XLS .52A - Hobby People
Contents
1. Email service globalhobby net For product warranty inFormation please reFer to the warranty card provided with your engine 280110 46609 Muffler Gasket 280201 40228 Propeller Nut and Washer 280713 S52204 Connecting Rod 281151 400160 Sleeve Index Pin 281154 S91225 Drive Washer Spacer 281155 S91109 Ball Bearing Front 281159 40120 Cylinder Head Mounting Bolts 6 281160 80841 Lock Washers 2 281163 91130 Lock Washer 281166 12862 High Speed Needle Valve Seat Complete 281168 46871F Rear Needle Valve Mount Plug 281240 S40119 Carburetor Retaining Bolts 2 281242 S40219 Drive Washer 281244 S40873F Rear Needle Valve Mount Only 281245 S40813 Throttle Barrel 281246 S40901 Bolt Set Cylinder Head and Backplate 281265 S40863 Carburetor Body with Spray Bar 281306 28123 Rear Needle Valve Mounting Bolts 2 281420 40110 Ball Bearing Rear 281601 40134 Backplate Mounting Bolts 4 281715 120616 Muffler Axial Bolt with Nut 281720 S40120 Muffler Mounting Bolts 2 281798 S15860 High Speed Needle Valve Assembly Complete 281799 S15861 High Speed Needle Valve with O Ring 281800 S40874F Rear Needle Valve Assembly Complete 281901 12833 High Speed Needle Valve Detent Spring 281903 12847 Needle Valve Seat Plug Gasket 282002 12819 Fuel Nipple with Gasket 282004 12114 Fuel Nipple without Gasket 282130 46814A Throttle Barrel Spring 282159 S32868F Carburetor Plug 282201 46866 Throttle Arm2. For proper cooling the total cowl air exit area should be 30 greater than the total air intake area 1 Global Services l 18480 Bandilier Circle l Fountain Valley CA 92708 l Phone 714 963 0329 l Fax 714 964 6236 l Email service globalhobby net For product warranty information please refer to the warranty card provided with your engine Magnum XLS series engines are distributed exclusively by Global Hobby Distributors All contents copyright 2009 Global Hobby Distributors August 2009 Displacement 52ci 8 47cc Bore Stroke 22 4mm 21 5mm Practical RPM 2 200 18 000 Weight w Muffler 17 4oz Crankshaft Thread Size 1 4 28 l ABC Piston and Sleeve l Dual Ball Bearing Supported Crankshaft l Dual Bushing Supported Connecting Rod l High Flow Quiet Muffler for More Power l Rear Mounted Needle Valve Option Included Engine Orientation Your XLS series engine can be orientated in any position on the firewall Keep in mind that when the engine is mounted inverted carburetor adjustments will need to be made differently and the fuel tank may need to be lowered See fuel tank size and orientation to carburetor on the next page XLS 52A AIRCRAFT ENGINE SPECIFICATIONS AND FEATURES INTRODUCTION BECOMING
3. Set low speed needle valve richer E Low speed needle valve set too rich E Set low speed needle valve leaner F Air leak in fuel system and or engine F Replace fuel lines and or tighten all engine bolts G Propeller too large G Replace with one size smaller propeller 5 Throttle barrel does not A Throttle servo linkage out of adjustment A Adjust throttle linkage to close throttle barrel close completely completely B Idle stop screw out of adjustment B Turn idle stop screw counter clockwise until throttle barrel closes fully C Low speed needle valve set too lean C Set low speed needle valve richer 6 Engine overheats A Engine running too lean A Richen high speed needle valve B Cowl too restrictive B Open larger vents in cowling to allow air to exit C Wrong type of fuel used C Use fuel with recommended oil content and type D Engine not fully broken in D Allow engine further break in time 7 Engine stops abruptly A Engine running too lean A Richen high speed needle valve B Piston and sleeve out of tolerances B Return engine to Global Services C Engine overheating C See 6 above D Low speed needle valve set too lean D Set low speed needle valve richer E Failed glow plug E Replace glow plug with new one F Fuel tank empty F Refill fuel tank PROBLEm CAUSE SOLUTION Global Services 18480 Bandilier Circle Fountain Valley CA 92708 Phone 714 963 0329 Fax 714 964 6236
4. and do NOT work well in Magnum engines If there is any question it s always safe to use a castor oil synthetic oil blended fuel regardless of brand as long as the oil content matches what is specified above HIGH AND LOW SPEED NEEDLE VALVES High Speed Needle Valve The high speed needle valve is used to meter the air fuel mixture at full throttle Turn the needle valve clockwise to lean the mixture or turn the needle valve counterclockwise to richen the mixture When you start the engine for the very first time the needle valve should be turned in completely then backed out 2 1 2 turns When you start the engine after that leave the needle valve in the same position it was in when you shut down the engine Global Services l 18480 Bandilier Circle l Fountain Valley CA 92708 l Phone 714 963 0329 l Fax 714 964 6236 l Email service globalhobby net IMPORTANT Your XLS series engine is an ABC engine The cylinder sleeve is tapered at the top causing severe resistance when the piston moves through the top of the stroke This is normal When the engine heats up to operating temperature this resistance will decrease and the proper clearance will be achieved The break in procedure will guide you through the steps necessary to properly break in your new ABC engine The break in process allows the engine parts to perfectly fit each other and properly protect each part from premature wear The engine should be broken in using the type of f
5. 281715 281715 281163 284230 282004 284229 280110 284231 281246 282201 282310 282412 281245 282401 282130 282608 281265 282002 281903 282159 283022 283023 281168 282501 281244 284206 281901 282452 281799 281798 281166 281800 282002 281903 281160 281160 281159 XLS 52A AIRCRAFT ENGINE DIMENSIONAL DRAWING DImENSIONS A 3 3 8 B 3 1 2 C 4 3 4 D 2 7 8 E 3 1 2 F 11 16 G 1 1 8 H 1 7 16 I 1 3 4 J 2 1 16 K 1 1 16 L 1 7 16 m 1 3 4 N 7 16 Use this drawing to help you determine engine mounting requirements Drawing is not to scale and is generic in nature Xls
6. aircraft or on a suitable engine test stand to run the engine Follow the mounting instructions in your aircraft s instruction manual or on the plans for individual mounting recommendations Do not clamp the engine in a vise to test run it l Use the recommended size propeller and follow the proper procedure for mounting the propeller Use the correct size wrench to tighten the propeller nut Do not use pliers l Inspect the spinner propeller and propeller nut on a regular basis looking for any signs of nicks cracks or loosening l To stop the engine adjust the throttle linkage to completely close the throttle barrel and therefore cut off the fuel air supply You can also pinch the fuel line to stop the engine but only if it is accessible Do not throw anything into the spinning propeller or attempt to use your hands to stop the engine l While the engine is running stand behind the engine to make any adjustments to the needle valves Do not reach over or around the propeller Do not lean toward the engine Do not wear loose clothing or allow anything to be drawn into the spinning propeller while the engine is running l If you need to carry your model while the engine is running be conscious of the spinning propeller Keep the aircraft pointed away from you and others at all times l Do not use a tight fitting cowl over the engine It can restrict air from flowing over the engine which could result in engine damage from overheating
7. securely to prevent the muffler cone from loosening q 3 Install a glow plug into the cylinder head making sure to use the copper gasket provided with the glow plug q 3 Install the propeller to the engine using the propeller nut and washer provided Tighten the nut securely using an adjustable wrench q 4 Connect the fuel lines from the fuel tank to the engine The fuel pick up line should be connected to the fuel nipple on the carburetor and the pressure line should be connected to the pressure nipple on the muffler Engine Starting q 1 Carefully turn the high speed needle valve in completely until it stops then turn the needle valve out 2 1 2 turns This is the mixture setting for initial starting IMPORTANT Do not adjust the low speed needle valve at this time It s factory adjusted for the break in process q 2 If hand starting prime the engine by opening the throttle barrel completely placing your finger over the carburetor opening and flipping the propeller through compression 2 3 times If you will be using an electric starter do not prime the engine The starter will turn the engine over fast enough to draw fuel on its own q 3 Connect the glow starter to the glow plug Open the throttle barrel to about 1 4 throttle and start the engine If you are starting the engine by hand you will need to vigorously flip the propeller several times before the engine will start Once the engine begins running immediately turn
8. 282310 46810F Low Speed Needle Valve with O Ring 282401 40816 Carburetor Base O Ring 282412 40845 Low Speed Needle Valve O Ring 282452 46845F High Speed Needle Valve O Ring 282501 91137 Fiber Washer 282608 46837F Idle Stop Screw with Nut 283022 S40801F Carburetor Assembly Complete 283023 S40803F Carburetor and Rear Needle Valve Assemblies 284206 12830 High Speed Needle Valve Seat 284220 S52103X Cylinder Head 284221 S52112 Cylinder Head Gaskets 2 284222 S52203 Piston and Sleeve Set 284223 S52213 Wrist Pin and Retainer Set 284225 S52101 Crankcase 284226 S52210 Crankshaft 284227 S52111 Backplate Gasket 284228 S52102 Backplate 284229 S52601X Muffler Complete 284230 S52604X Muffler Middle 284231 S52416 Gasket Set Cylinder Head and Backplate ORDER REFERENCE DESCRIPTION Revision 3 August 2009 Replacement parts can be ordered directly from your local Magnum engine hobby retailer If your hobby retailer does not stock Magnum engines you can order replacement parts direct from us Global Services 18480 Bandilier Circle Fountain Valley CA 92708 Phone 714 963 0329 Fax 714 964 6236 Email service globalhobby net XLS 52A AIRCRAFT ENGINE EXPLODED PARTS VIEW 284220 284221 284222 284223 280713 281720 281160 281240 281240 284225 281155 281154 281242 280201 281420 281151 284226 284227 284228 281800 281306 281601 281160
9. FAMILIAR WITH YOUR ENGINE If you are familiar with the operation of two stroke model engines or just can t wait to run your new engine please read through the Quick Start Guide included The Quick Start Guide will help you get started right away and also includes some good recommendations We do recommend reading through these Operating Instructions in their entirety to familiarize yourself with the features and operation of your new engine We have also included a Troubleshooting Guide should you encounter any problems Please use the photos below to familiarize yourself with the components of your new Magnum XLS series engine CAUTION PLEASE READ BEFORE USE ENGINE INSTALLATION XLS 52A AIRCRAFT ENGINE P N 210760 Due to running manufacturing changes and improvements your engine may differ slightly from that shown OPERATING INSTRUCTIONS Engine Bolts and Firewall Requirements The engine should be mounted to either a glass filled nylon engine mount a machined aluminum engine mount or an integrated hardwood beam mount Use only high quality 6 32 or 4mm steel socket cap screws and related hardware to mount the engine to the engine mount The firewall in the aircraft should be aircraft grade 5 ply plywood no less than 1 4 thick and the firewall should be reinforced to meet the torque and weight of the engine Fuel Tank Size and Orientation to Carburetor Ideally the stopper in the fuel tank should be level with the hig
10. Fountain Valley CA 92708 l Phone 714 963 0329 l Fax 714 964 6236 l Email service globalhobby net Using a 1 4 drill bit or a propeller reamer enlarge the hole in the propeller hub to fit the crankshaft Slide the propeller onto the crankshaft up against the drive washer then slide the propeller washer up against the propeller and thread the propeller nut into place Tighten the propeller nut firmly to secure the propeller into place When tightening the propeller nut use an adjustable wrench or a 4 way wrench Do not use pliers WARNING If you are installing a spinner onto your engine the spinner cone must not rub against the propeller Allowing the spinner cone to rub against the propeller could lead to propeller damage and eventual propeller failure Your XLS series engine can be started using an electric starter or it can be started by hand For safety and ease of starting especially when the engine is new we recommend using an electric starter The following two procedures should be done with the power to the glow plug off WARNING ABOUT ENGINE HYDRO LOCKING If the engine becomes hydro locked do not force the propeller through the compression stroke The excess fuel should be expelled from the engine l Completely close the high speed needle valve until it bottoms out then remove the glow plug from the cylinder head l With a rag over the top of the engine turn the crankshaft several times using your electric star
11. Thank you for choosing a Magnum XLS series aircraft engine The XLS 52A is a single cylinder two stroke engine incorporating ABC Aluminum piston Chrome plated Brass sleeve technology for long life high power output and easy break in The engine features a dual needle valve carburetor with optional rear mounted needle valve for precise fuel airflow metering dual ball bearing supported crankshaft dual bushing supported connecting rod and a high flow quiet muffler Your Magnum XLS series engine was designed by expert engineers and built by master craftsmen using only the highest quality materials and CNC machinery These qualities provide the long life and dependability you have come to expect from an engine of this caliber Magnum XLS series model aircraft engines will consistently give you dependable performance and reliability and will be a source of satisfaction and pleasure if you follow these instructions as to the engine s proper and safe use You alone are responsible for the safe operation of your engine so act sensibly and with care at all times This Magnum XLS series model aircraft engine is not a toy It is a precision built machine whose power is capable of causing serious injury to yourself and others if abused or misused or if you fail to observe proper safety precautions while using it l Keep spectators especially small children at least 20 feet away from the engine while it is running l Mount the engine securely in the
12. While holding the carburetor firmly down into place install and GENTLY tighten the socket cap screws using the hex wrench provided WARNING Do not overtighten the socket cap screws or you might strip the threads in the carburetor resulting in replacement of the carburetor Muffler Installation The muffler is mounted to the engine using the two socket cap screws two split washers and one of the two gaskets provided The second gasket should be kept as a spare Tighten both screws firmly to prevent the muffler from loosening during flight The exhaust cone on the back of the muffler can be adjusted to better match the installation of your particular application To adjust the exhaust cone loosen the retaining nut rotate the cone to the desired angle then tighten the retaining nut firmly while holding the axial bolt in place from the front of the muffler It is important to tighten the retaining nut firmly to prevent the exhaust cone from loosening during flight Carburetor Idle Stop Screw and Adjusting the Idle Speed The idle stop screw holds the throttle barrel in the carburetor body and also adjusts the closure of the throttle barrel We recommend adjusting the idle stop screw to allow the throttle barrel to close completely This will allow you to adjust the idle speed via your transmitter therefore you will need to set up your transmitter throttle trim lever to keep the engine at a low idle when the trim lever is centered th
13. ating and heat dissipation qualities Fuel Tank Dubro 12oz Fuel Tank Product Number 412 Dubro fuel tanks are a perfect match for your XLS series engine This size recommendation will give you about 10 15 minutes of run time at full throttle Dubro fuel tanks are possibly the easiest fuel tanks to assemble and maintain and feature a chin at the base of the fuel tank that prevents the fuel tubing from kinking when installed in your aircraft Glow Plug Thunderbolt 3 Glow Plug Product Number 115559 The Thunderbolt 3 glow plug is designed to be used in high performance engines using fuels containing 10 30 nitro content and in any environment It is a hot type of glow plug for easy starting excellent transition and incredible top end The glow plug is also very durable and able to withstand repeated use day after day Propeller APC 10 x 6 Propeller Product Number LP10060 We have found that XLS series engines run best using APC brand props They are designed to be very efficient and run quiet at high rpm s and they are also durable Use this size propeller to break in your engine then change to the propeller that best suits your application Use the guide in the Operating Instructions to help you find the right size propeller Glow Starter Magnum Glow Starter w Meter Product Number 237438 The Magnum glow starter is an excellent choice for heating the glow plug It uses a Sub C NiCD includes a meter to determine t
14. en to shut off the engine when the trim lever is pulled all the way back To adjust the idle stop screw first loosen the hex nut using an adjustable wrench then loosen the idle stop screw turn counter clockwise to allow throttle barrel to close more or tighten the idle stop screw turn clockwise to make the throttle barrel stay open more When satisfied with the adjustment tighten the hex nut firmly Needle Valve Extension If an extension is required to adjust the high speed needle valve use a 1 5mm diameter wire of the necessary length not included Loosen the grub screw in the side of the needle valve using a 1 5mm hex wrench insert the wire into the end of the needle valve then tighten the grub screw firmly Throttle Arm Position The throttle arm angle can be adjusted to better suit your particular application Using a 1 5 hex wrench loosen grub screw in the side of the throttle arm then adjust the angle of the throttle arm either forward or backward and firmly tighten the grub screw Propeller Installation WARNING Before installing the propeller it must be balanced Running your engine using an out of balance propeller can lead to excessive vibration which will result in excessive stress and wear on both the engine and the airframe Balance the propeller using the method recommended by the propeller manufacturer Several products are available to properly balance propellers Ask your local retailer for more information abo
15. essive white smoke coming from the exhaust Let the engine run for approximately 10 minutes then stop the engine q 6 Let the engine cool for approximately 10 minutes then restart it Set the high speed needle valve mixture to a slightly leaner setting about 1 4 turn more in Let the engine run for about 5 minutes at this setting then stop the engine and let it cool for approximately 10 minutes q 7 Repeat the procedure in step 6 while leaning the needle valve slightly more each time In all you should run the engine about a total of 45 minutes of actual running time After 45 minutes of run time the engine is ready for flight Fly the aircraft with the engine set as rich as possible but with adequate power to fly the aircraft After each flight lean the mixture slightly Continue to do this for about 5 flights At this point the engine should hold a good setting on the high speed needle valve and you can begin to fine tune the needle valve settings to increase performance BREAK IN PROCEDURE Setting the High Speed Needle Valve q 1 Start the engine and remove the power from the glow plug Allow the engine to warm up for about 30 seconds q 2 After the engine has warmed up slowly lean the high speed mixture until the engine reaches peak rpm After reaching peak rpm richen the mixture slightly until an audible drop in rpm is heard If you are using a tachometer this should be between a 200 300 rpm drop q 3 With the engine runnin
16. g at full power carefully lift the nose of the aircraft about 45 into the air The mixture should not become too lean but you may hear a slight increase in rpm If the engine sags or loses rpm when you hold the nose up the mixture is too lean If this is the case slightly richen the mixture and follow the test once more IMPORTANT Rpm will increase about 10 30 in the air This is due to the forward motion of the aircraft as it is flying Because of this more air is entering the carburetor at a higher force which causes the mixture to lean out Additionally as the fuel level in the fuel tank goes down fuel draw becomes more difficult for the engine especially during aerobatics thus causing the mixture to go lean It is imperative that you set the mixture rich while on the ground to compensate for the leaning tendencies that will happen in the air Always watch the exhaust during your flight The engine should leave a noticeable white smoke trail at all times If there is no smoke trail the engine is running too lean You should land immediately and reset the mixture Setting the Low Speed Needle Valve q 1 Start the engine and lean out the high speed needle valve as per the previous steps Close the throttle until the slowest reliable idle is reached Allow the engine to idle for about 15 20 seconds q 2 Quickly advance the throttle to full If the engine just stops running as soon as the throttle is advanced the idle mixture is
17. h speed needle valve or just slightly below it Some models will only allow the fuel tank to be mounted higher than the ideal location A fuel tank that is positioned higher than the ideal location usually doesn t pose any problem except when it is mounted excessively higher and or is used in conjunction with an inverted mounted engine or during extreme aerobatic flight If you mount the engine inverted we strongly suggest lowering the fuel tank so the stopper assembly is slightly below the high speed needle valve Doing this will prevent fuel from siphoning into the engine and flooding it If you cannot lower the fuel tank far enough we suggest lowering it as far as can be allowed in your particular application The size of the fuel tank used should be 10oz 12oz depending on the model and the length of flights desired Use of a 12oz tank will provide approximately 15 minutes of run time at full throttle Use of a fuel tank any larger than 12oz can lead to excessive leaning of the engine during flight and is not recommended Carburetor Installation The carburetor is held in place using two socket cap screws provided Slide the base of the carburetor into the crankcase being careful to keep the carburetor perpendicular to the front of the engine Using your thumb push down firmly on the carburetor so that the base of the carburetor sets completely into the crankcase An o ring is installed on the carburetor throat to seal the joint
18. he quality of your glow plug and it also includes a charger to recharge the battery It s a very economical product to purchase and can be used with any engine that uses a glow plug Engine mount Dave Brown Engine Mount Product Number 4650 The Dave Brown engine mount is a glass filled reinforced nylon mount that mounts to a plywood firewall in the model It is lightweight strong and easy to install XLS 52A AIRCRAFT ENGINE QUICK START GUIDE The following information is provided to get your new Magnum XLS series engine running right away with minimal effort We have listed our recommendations for fuel propeller starting procedures and other recommended accessories Also included is general information about the accessories needed for the engine that we hope you will find helpful This Quick Start Guide should not be used as a replacement for the Operating Instructions included rather it should be used along with the Operating Instructions We highly recommend reading through the Operating Instructions to familiarize yourself with each part of the engine along with the proper procedures for engine break in and tuning Engine Preparation q 1 Mount the engine to the recommended engine mount A wood beam mount built into the airframe would also be sufficient q 2 Install the muffler onto the engine using the hardware provided The muffler cone can be rotated to better suit the installation in your model Be sure to tighten the nut
19. ill also be lowering the amount of lubricant entering your engine Less lubricant means more chance of your engine overheating and possible engine failure OPTIMIZING THE MIXTURE SETTINGS l Avoid running the engine under dusty conditions If you are in a dusty environment we suggest using an air filter over the carburetor l At the end of every flying day purge the engine of fuel by disconnecting the fuel line and allowing the engine to run dry of fuel l Use a high quality after run oil in the engine after you have purged the engine of fuel Inject the oil into the engine through the carburetor and through the glow plug hole Rotate the crankshaft several times to distribute the oil throughout the engine This will prevent the engine from forming rust BASIC ENGINE MAINTENANCE OUR RECOMMENDATIONS The following items are recommended for use with your Magnum XLS series aircraft engine These items are recommended for initial start up and running Please read through the Operating Instructions for further details Fuel Power Master 15 2 Stroke Premium Sport Fuel Blend for Break In and for Normal Use We suggest using Power Master brand fuels Power Master fuel comes in many different nitromethane contents that can be used in your XLS series engine Power Master fuels are blended using only high quality nitromethane methanol castor oil and synthetic lubricants to provide high power output along with easy starting and unmatched lubric
20. oo large will cause the engine to run at too low an rpm cause it to lug down too much and make tuning difficult In both instances this can lead to premature engine wear and eventual failure PROPELLER SIzE RECOmmENDATIONS Use for Break In 10 x 6 9 x 6 10 x 5 8 11 x 4 8 12 x 3 6 Glow Plug Recommendation Glow plugs can make a big difference in the performance of your engine We recommend using a long reach hot heat range glow plug intended specifically for high performance two stroke engines Do not use a cold heat range plug and do not use glow plugs that use an idle bar This can lead to erratic engine runs difficult tuning and eventual engine wear and failure Fuel Recommendation Fuel can make a big difference in the way your engine performs We recommend using a fuel containing 10 20 nitro and 18 20 castor oil synthetic oil blend lubricant The same fuel can be used for both break in and normal running Do not use a fuel containing less the 18 oil IMPORTANT We highly recommend that the first gallon of fuel run through the engine contains either a castor oil synthetic oil blend or all castor oil Do NOT use an all synthetic oil fuel for the break in period After the first gallon of fuel you can switch to an all synthetic oil fuel but only if the fuel is of high quality For example some sport all synthetic fuels use low grade oils or oils with the wrong thermal properties they do not transfer heat well
21. ot charged and or faulty B Fully charge glow starter and or replace C Engine not being turned over fast enough C Use an electric starter to start engine D Low speed needle valve set too lean D Reset low speed needle valve to factory setting E Old or contaminated fuel E Replace with new fuel F Engine flooded with too much fuel F Remove glow plug and expel fuel from cylinder G Faulty fuel tank and or stopper assembly G Check and or replace fuel tank assembly H Air leak in fuel system and or engine H Replace fuel lines and or tighten all engine bolts 2 Engine does not draw fuel A Air leak in fuel system and or engine A Replace fuel lines and or tighten all engine bolts B High speed needle valve fully closed B Reset high speed needle valve to factory setting C Low speed needle valve set too lean C Reset low speed needle valve to factory setting D Fuel lines kinked D Check and straighten fuel lines E Defective fuel tank E Replace fuel tank 3 Engine vibrates excessively A Propeller out of balance A Balance propeller B Engine and or engine mount loose B Tighten engine mounting bolts 4 Engine does not transition A Failed and or wrong type glow plug A Replace with new recommended glow plug B Old and or wrong type fuel B Replace with new recommended fuel C High speed needle valve set too rich C Set high speed needle valve to leaner setting D Low speed needle valve set too lean D
22. ter or flipping the propeller by hand The excess fuel will be expelled out of the engine and into the rag l Check to make sure that the glow plug has not been fouled then reinstall it and reset the high speed needle valve Low Speed Needle Valve The low speed needle valve is preset from the factory for initial starting and break in Do not adjust it until after the engine is broken in The low speed needle valve regulates the air fuel mixture at idle and during transition from idle to full throttle Turn the needle valve clockwise to lean the mixture or turn the needle valve counterclockwise to richen the mixture The low speed needle valve is preset from the factory but minor adjustments may need to be made after the engine is broken in To reset the low speed needle valve to the factory setting follow these procedures l Open the throttle barrel completely l While holding the throttle barrel open turn the low speed needle valve clockwise GENTLY until it stops From this point while still holding the throttle barrel open turn the low speed needle valve counter clockwise 3 full turns This is the factory setting WARNING It is possible to adjust the low speed needle valve so lean that the engine will not draw fuel The low speed needle valve should not need to be adjusted more than one full turn in either direction from the factory setting If the engine does not idle or transition reset the low speed needle valve to the factory set
23. the high speed needle valve in about 1 4 turn to keep the engine running q 4 Advance the throttle to full while turning the high speed needle valve in to keep the engine running The engine should be producing a very noticeable white exhaust from the muffler and sound like it is running rough Allow the engine to run only for about 5 minutes then shut the engine off q 5 Now that you have started your engine it must be properly broken in Proper break in will seat all of the moving parts particularly the piston and cylinder This procedure takes about 20 30 minutes of run time and is highly recommended An engine that is properly broken in will produce more power be more user friendly and last much longer than an engine that does not receive a break in period For this reason we highly recommend following the break in procedure detailed in the Operating Instructions before running the engine further QUICK STARTING PROCEDURES XLS 52A AIRCRAFT ENGINE TROUBLESHOOTING GUIDE This troubleshooting guide has been provided to help you diagnose and solve most problems that you may encounter with your XLS series engine Most problems encountered can be solved by carefully following the problem cause solution sections below If you cannot solve the problem using this troubleshooting guide please feel free to contact us using the information below 1 Engine does not start A Failed glow plug A Replace glow plug with new one B Glow starter n
24. ting STARTING PROCEDURE Starting Using an Electric Starter It s best to use an electric starter only when your engine as a spinner installed Prior to use make sure that the electric starter is turning counter clockwise When using an electric starter it is not necessary to prime the engine The starter turns the engine over fast enough that the engine draws fuel on its own Priming the engine prior to using an electric starter can cause the engine to hydro lock flood Turning the engine over with an electric starter while the engine is flooded can cause extreme damage to the engine and or cause the propeller assembly to come loose Turn the propeller through the compression stroke one time by hand to check for a hydro locked state before applying the starter 3 PROPELLER GLOW PLUG AND FUEL Propeller Recommendation The diameter and pitch of the propeller needed for the XLS 52A engine will vary greatly depending on the application the engine is used in The weight drag and the type of model and how you intend to fly it are all factors in determining the correct size propeller to use Experimentation will be necessary to find the optimal size propeller for your particular application Ideally you want a propeller that the engine will turn in the 10 000 15 000 rpm range on the ground yet power the aircraft sufficiently Using a propeller that is too small will cause the engine to run at too high an rpm Using a propeller that is t
25. too lean With the engine stopped richen the idle mixture about 1 8 of a turn q 3 Repeat steps 1 and 2 until the engine will transition from idle to full throttle smoothly Minor hesitation in the transition is normal q 4 If you quickly advance the throttle from idle to full and the engine seems to be very rich during transition i e lots of smoke coming from the exhaust the mixture is too rich With the engine stopped lean the idle mixture about 1 8 of a turn q 5 Repeat steps 1 and 4 until the engine will transition from idle to full throttle smoothly Minor hesitation in the transition is normal 4 Starting by Hand When starting the engine by hand always use a chicken stick or a heavy leather glove Never just use your bare hand or serious injury could result To make the engine easier to start by hand it should first be primed This is done by opening the throttle barrel completely and covering the tip of the muffler with your finger Fuel can then be drawn into the engine by pulling the propeller through the compression stroke 2 3 times This will draw fuel into the engine After fuel begins to enter the carburetor remove your finger from the muffler and pull the propeller through the compression stroke once to check for a hydro locked condition WARNING Be careful never to lean the engine out too much Remember that the lubricants for your engine are suspended in the fuel If you lean out the fuel mixture too much you w
26. uel recommended in the Fuel Recommendation section on page 3 Fuel containing only synthetic lubricants should not be used during the break in procedure For the break in procedure we recommend mounting the engine into the aircraft it will be used in This way the muffler fuel tank and throttle linkage can all be tested in combination with the engine If your aircraft uses a cowl it should be removed during the break in procedure q 1 Turn the high speed needle valve out 2 1 2 turns from the fully closed position q 2 If you are using an electric starter to start the engine follow the procedure in the previous section on page 3 If you are starting the engine by hand follow that procedure in the previous section above q 3 Open the throttle barrel to approximately 1 4 throttle then connect the power to the glow plug Start the engine using an electric starter or by hand If starting by hand you will need to vigorously flip the propeller through the compression stroke several times before the engine will start q 4 Once the engine starts open the throttle barrel to about 1 2 throttle You may need to lean the high speed needle valve in about 1 4 turn to keep the engine running at half throttle q 5 After the engine has been running about 1 minute remove the power from the glow plug and slowly advance the throttle barrel to full throttle Adjust the high speed needle valve so that the engine is running very rich You should notice exc
27. ut these items 2 Global Services l 18480 Bandilier Circle l Fountain Valley CA 92708 l Phone 714 963 0329 l Fax 714 964 6236 l Email service globalhobby net Rear Needle Valve Assembly Installation Optional Your XLS Series engine comes with the needle valve preinstalled in the carburetor Also included is a rear needle valve assembly which can be installed in place of the carburetor mounted needle valve assembly By using the rear needle valve assembly adjusting the needle valve is safer because it s further behind the spinning propeller To mount the rear needle valve assembly use an adjustable wrench to unscrew and remove the needle valve assembly from the carburetor and to unscrew and remove the plug from the rear needle valve mount Carefully thread the needle valve assembly into the rear needle valve mount and tighten it firmly then carefully thread the plug into the carburetor and tighten it firmly Remove the two upper backplate mounting screws then install and tighten the two longer socket cap screws and split washers included with the rear needle valve assembly to secure the rear needle valve assembly to the engine backplate Connect the length of fuel tubing provided between the chrome fuel nipples on the rear needle valve assembly and the carburetor The fuel pick up line from your fuel tank should be connected to the larger brass nipple on the rear needle valve assembly Global Services l 18480 Bandilier Circle l
Download Pdf Manuals
Related Search