DLE-20 Operator`s Manual
Contents
1. No 3 clockwise will increase the idle speed Turning the Idle Screw counter clockwise will decrease the idle speed Low Speed Needle Adjustment Turning the Low speed Needle No 4 clockwise will lean the fuel air mixture at low speeds Turning the Low speed Needle No 4 counter clockwise will richen the fuel air mixture at low speeds The default or factory setting of the Low speed Needle is as follows turn the needle to the fully stop closed position and then turn back 1 1 turns High Speed Needle Adjustment Turning the High speed Needle No 5 clockwise will lean the fuel air mixture at high speeds Turning the low speed Needle No 5 counterclockwise will richen the fuel air mixture at high speeds The default or factory setting of the High speed Needle is as follows 13 turn the needle to the fully stop closed position and then open the needle 1 5 turns It is recommended that the High speed needle be adjusted by the use of a tachometer to obtain maximum speed Smooth acceleration and deceleration is an indicator of proper engine performance Ignition Timing Adjustment The ignition timing is preset on the DLE 20 at 38 40 beforeTop Dead Center TDC The ignition timing can be advanced or retarded by loosening the 2 ignition sensor Phillips head screws and sliding the sensor to the full extent clockwise 41 advancing the ignition or counter clockwise 37 retarding the ignition Be sure to retighten the Phillips2. head screws after adjusting the ignition timing It is best to attach the sensor with the screws centered in the slot as a starting point Advancing the timing causes combustion to occur earlier resulting in higher performance of the engine However advancing the timing also causes higher engine temperatures and can cause premature wear of internal engine components Carburetor Adjustment Troubleshooting Problem If The engine hesitates when accelerated rapidly or The rpm increases at idling or The engine stops when the throttle is moved from high to low Solution The low speed needle L is too lean Open it up about 1 8 of a turn and try again Problem If The idle is not steady Solution The low speed needle L valve is too rich Close it 1 8 of a turn and try again Problem If Engine stops at full throttle or Engine hesitates when accelerated rapidly or The engine will not come up to full rpm at full throttle Solution The high speed needle valve H is too lean Open it up 1 8 of a turn and try again Problem If Your engine does not reach full rpm or Carbon build ups appear consistently on your spark plug Solution The high speed needle valve H is too rich Close it up 1 8 turn and try again O Starting Procedures SEE When starting the engine the first time and during break in it s recommended that you run the engine without the cowling Also for safety reasons do not adjust the
3. the ignition point For optimum performance please use fresh or recently purchased 93 octane gasoline 87 octane gasoline will suffice with a 30 1 gas oil mixture GAS OIL Mixing Chart 1 Gallon Gasoline 128 fl 0z 3 78L 2 Cycle Oil 4 26floz 125 68ml 30 1 ratio Excessive running of the engine at idle speed can result in a seriously carbonized spark plug Keep the surface of the engine clean to ensure proper heat dissipation Ensure proper cooling ventilation around the cylinder with adequate air exhaust To avoid permanent damage to the electronic ignition system NEVER rotate the propeller on your DLE engine with the electronic ignition system switched on and the plug not installed in the plug cap O Installation Instructions ma Prepare the engine for installation Before beginning installation it s a good idea to plan location of the various components of the engine Many of the following steps may need to be completed in a different order than listed 1 Check to see that all screws and bolts are tight Check carefully for any cracks broken or missing parts Tighten or replace any damaged or missing parts before proceeding From Sensor eu PS e 2 Install the silicone wire cover over the pick up lead coming from the engine cut the excess silicon wire cover and connect the lead to the pick up lead from the Electronic Ignition Module Secure the connection with the included three pin connector securing
4. Block Gasket Carburetor Gasket Muffler Gasket Head Gasket Reed Valve Gasket Woodruff Key Propeller Jam Nuts 2 Spark Plug Cap Spark Plug Optional Parts DLEG5525 Digital Tachometer See page 17 22 3 56 in 90 mm 23 DLE 20 Mounting Pattern with DUBG1307 Engine Mount De in 70 mm a Co ay y 2 75 in 70 mm
5. DLE 20 Operators Manual O Specifications Displacement Performance Idle Speed Ignition Style Recommended Propellers Spark Plug Type DLE 2010 Hobbico Inc Diameter x Stroke Compression Ratio Carburetor Weight Fuel 20cc 1 2 cu in 2 5 HP 9 000 rpm 1 700 rpm Electronic Ignition 14x10 15x8 16x6 16x8 17x6 CM6 Gap 0 018in 0 020 in 0 45mm 0 51mm 1 26 in 32mm x 0 98 in 25 mm 10 5 1 DLE MP 148 100424 with Manual Choke Main Engine 1 43 lb 650g Muffler 1 76 oz 50g Electronic Ignition 4 23 oz 120 g 87 93 Octane Gasoline with a 30 1 gas 2 stroke 2 cycle oil mixture DLEG0020 Mnl 1 DLE 20cc Gas Engine w DLE MP 148 100424 1 DLE Spark Plug NGK CM6 size with additional spring 1 Muffler with gasket 2 4x14 mm SHCS muffler mounting 1 Electronic Ignition Module with additional tachometer lead 1 Silicone Pick up Wire Cover Ignition Wire Cover 1 Red Three Pin Connector Lead with Pig Tail ignition switch 1 Long Throttle Arm Extension with installation screw and nut 2 Three Pin Connector Securing Clips 1 DLE Decal not pictured gt Safety Tips and Warnings se This engine is not a toy Please place your safety and the safety of others paramount while operating DLE will not be held responsible for any safety issues or accidents involving this engine Operate the engine in a properly ventilated area Before sta
6. LE 20 on Your Airplane Note The DLE 20 must be installed on at least a 6mm 1 4 firewall The firewall must be securely glued to the airplane Use triangle stock and pin the firewall with hardwood dowels to reinforce the firewall glue joints Never install the DLE 20 onto a firewall thinner than specified because it may fail due to the power of the engine 1 Select an engine mount A two piece engine mount that does not interconnect or overlap at the firewall is preferred for the DLE 20 like the Dubro Vibration Reducing Engine Mount 1 20 1 80 DUBG1307 2 Before securing the engine mountto the firewall test fit the engine onto the mount and place the mount onto the firewall Use this positioning to create an engine mounting template Use the template to drill the mounting holes in the locations on the firewall Note A Template for mounting the DUBG1307 is provided on the back of this manual Press the blind nuts into the rear of the firewall If you choose to use regular nuts or lock nuts be sure to place washers on the bolts before securing the nuts onto the bolts on the rear of the firewall Be sure to use Threadlocker on the screws holding the engine mount to the firewall 3 Place the engine on the engine mount and atthe recommended distance from the firewall and test fit the cowling on the aircraft to verify the distance When you re satisfied with the engine s position mark the location of the four holes on the mount 4 Re
7. carburetor while the engine is running There are two recommended ways to start the DLE 20 A Manual Starting Note When hand starting the DLE 20 use a thick glove or heavy duty starter stick to protect your hand 1 The propeller should be installed on the drive washer atthe one o clock position and at the beginning of the compression stroke so that it s comfortable to flip it through compression 2 Have someone help you hold the airplane while you start the engine 3 Switch the ignition to ON close the choke on the carburetor and open the throttle slightly from the idle position 4 Flip the propeller counter clockwise several times briskly until a popping sound is heard This indicates that the engine is firing 5 Move the choke lever to the OPEN position 6 Set the throttle to a high idle Set the propeller so that it is at the beginning of the compression stroke 7 Flip the propeller through compression rapidly If this is done properly the engine will start after several brisk flips of the propeller 8 After starting let the engine idle for 30 to 45 seconds Open and close the throttle slowly until the engine runs smoothly at idle and at full throttle Acceleration should also be smooth If acceleration is not smooth adjustments to the carburetor may be necessary see Adjustment of the Engine page 12 14 9 If your engine does not start repeat steps 2 8 15 B Electric Starter Starting A 24V elect
8. ce spark plug or check for spark Remove plug disconnect fuel line rotate prop to remove fuel Check for a fuel in tank b fuel tubing cut blocked or kinked c carburetor clogged This can be done by removing the spark plug from the cylinder and attaching the plug on the outside of the crankcase Have an assistant turn the engine over while checking this and be sure to have the spark plug firmly plugged into the ignition wire Warning The high voltage from the ignition can cause bodily harm especially when checking for spark in this manner gt Optional oe Tachometer not included mmm 17 An optional Digital Tachometer is available that can be directly connected to the ignition and display the RPM of the engine The Futaba DSC Charge Adapter FUTM4243 can be mounted in the fuselage and allows easy external plug in of the Digital Tachometer a will wa Many of the DLE Ignition modules have an additional lead to plug into the Digital Tachometer If your ignition module does not have this additional lead the DigitalTachometer can still be used Simply use theY harness included with the DigitalTachometer to connect to the pick up lead from the engine Be sure to secure all connections and to secure the Digital Tachometer or leads on the aircraft used O Engine Maintenance Please clean the fuel filter in the DLE Carburetor periodically Failure to do so may result in miss calibration of th
9. clip From the Battery Input or Kill Switch 3 Connect the kill switch lead to the red connector from the ignition control module using the lead from the kill switch or with the included three pin connector with pig tail Use one of the included three pin securing clips to secure the connection 4 Connect the ignition module battery to the kill switch Any 4 8 6 0V 1000mAh and above capacity battery will work well for this Use heat shrink tubing to secure this connection 5 Install the ignition kill switch and charge jack on the aircraft so that it is easily accessible from the outside of the plane 6 Install the ignition module securely in the airplane forward area It is recommended that a thin piece of foam rubber is placed between the module and the mounting surface and that Velcro is used to hold the module in place 7 Secure all connections with heat shrink tubing not supplied 8 Install the silicone ignition wire cover over the ignition wire 9 Install the spark plug into the engine head 7 8 Ibs torque rn gt Switch Not included Ignition Control Switch Wire To On Off Switch ELECTRONIC IGNITION SYSTEM l I I I l I l l l l Charge Tachometer Lead Lead ea Ignition Wire RPM Optional Battery To Spark Plug Pick Up a Tachometer t Put i Lead Sensor Wire ut Pu l Not included To Sensor On Engine n oe md N gt Installing the D
10. e Install all electronic radio devices as far away from the engine as possible The throttle and choke pushrods should be non metallic If the engine is not to be used for more than a month drain the fuel tank and remove any fuel from inside the carburetor Do this by running the engine at idle until it quits by running out of fuel Keeping gasoline inside the carburetor over an extended period of time will damage the diaphragm valve and clog passages inside the carburetor Due to the carburetor being more complicated than those used in glow engines keep the fuel clean by using a fuel filter Use a filter intended to be used with gasoline engines Metal filters intended for glow engine are too coarse and will not screen out finer particles Always filter your fuel by using an appropriate filter before putting it into the airplane s fuel tank Gasoline is extremely flammable Keep it away from an open flame excessive heat or sources of sparks Do not smoke near the engine or the fuel tank This engine was designed for use in a model aircraft Do not attempt to use it for any other purpose Always install an ignition system kill switch on the aircraft used Caution Running the engine with a lean gas mixture will cause the engine to overheat and burn the electrode of the spark plug Pay close attention to the High speed Needle adjustment Running the engine with the proper gas mixture will cause the spark plugs to appear yellow at
11. e needle adjustments In order to do this it is necessary to remove the Phillips head screw which secures the carburetor filter cover and the carburetor filter gasket Use only carburetor cleaner to clean the opening around the filter Ss Phillips Head Screw a Fuel Filter an 18 Warranty Information The DLE 20 has a two year limited warranty through Hobby Services beginning at the date of purchase Please retain your receipt as your proof of purchase gt Contact Us Hobby Services 3002 N Apollo Drive Suite 1 Ph 217 398 8970 Champaign ll 61822 Fax 217 398 7721 E mail enginesupport Hobbico com Web address www hobbyservices com 19 O Replacement Parts memme 21 Stock Key No No DLEG2001 DLEG2002 DLEG2003 DLEG2004 DLEG2005 DLEG2006 DLEG2007 DLEG2008 DLEG2009 DLEG2011 DLEG2012 DLEG2013 DLEG2014 DLEG2015 DLEG2016 DLEG2017 DLEG2018 DLEG2019 DLEG2020 DLEG2021 DLEG5510 N N N oon nrnmon PN wm Description Cylinder Crankshaft Crankcase Back Plate Piston Wrist Pin C Clips Piston Ring Electronic Ignition Module Muffler Muffler Gasket Carburetor Complete Connecting Rod Reed Valve Assembly Carburetor Block Front Bearing Set Rear Bearing Set Electronic Ignition Sensor Back plate O Ring Screw Set Propeller Drive Hub Assembly Thrust Washer Prop Washer Needle Bearing For Connecting Rod Gasket Set Carburetor
12. movethe engine from the mount Drill and tap the engine mount atthe position of the four mounting holes Use an appropriate size screw we used 2 1 1 4 and 2 1 8 32 thread SHCS It s a good idea to drill and tap all the way through the mounting beams in order to secure each screw with a lock nut 5 Secure the four screws with lock washers flat washers and lock nuts Drain Vent Pressure Relief Line Route to top front of fuel tank interior to prevent siphoning Fuel Tank Supply Line to Carburetor Fuel fill line Plug This line must be extend d F to exit the bottom of the aircraft 6 Install the fuel tank in the airframe Use only gasoline safe fuel lines and a gasoline safe stopper One line should go to the carburetor and the other is to be used as a vent a vent line is simply an open ended fuel line from the fuel tank which exits the engine compartment or the fuselage most vent lines exit at the bottom of the firewall You can fill the tank by using the carburetor line as fill line if you have access to it or install a third line to be used as fill line Installing a third line is the cleanest and easiest way to add fuel An alternative fueling set up is a 2 line system with aT fitting approved for gasoline use Be sure to use a filler plug with either a 2 line or 3 line set up It is a good idea to add an extension to the vent line as shown that goes up and to the rear of the tank This helps to av
13. oid draining fuel from the tank when the model is pointed down Throttle Servo 7 Install the throttle servo as far as possible from the engine Make sure that you get the carburetor s full range of rotation with your servo travel If needed use the included LongThrottle Arm Extension Be sure to use a non metallic linkage through an outer pushrod tube and a screw lock connector so that the linkage is adjustable FasLink for Choke or Screw Lock Connector tor Throttle Linkage Inner Pushrod Ball Link 2 56 Pushrod Components for the non metallic linkage can be purchased at your local hobby shop 8 Once the throttle servo is installed it s a good idea to deactivate the throttle return spring with a pair of needle nose pliers Gently grab the spring and remove it from tension on the throttle lever Deactivating the spring will remove the load or stress on the throttle servo 10 9 Install the choke servo optional at the same distance as the throttle servo from the engine Be sure to use a non metallic linkage and a Faslink to secure the throttle linkage to the servo 10 Connect the ignition wire from the ignition module to the spark plug 11 Install the muffler onto the engine Be sure to use threadlocker and that the ignition wire does not contact the muffler 12 Cut all necessary clearance carburetor adjustment cooling and exhaust holes in the cowl A 1 3 ratio of airflow intake area to airflow exhaus
14. ric starter is recommended to start the DLE 20 1 2 Make sure you use a good quality lightweight aluminum spinner Have someone help you hold the airplane while you start it Switch the ignition to ON close the choke plate on the carburetor and open the throttle slightly from the idle position Use your electric starter to turn the engine over for several seconds until a popping sound is heard This indicates that the engine is firing Move the choke lever to the open position Set the throttle to high idle and use your electric starter to turn over the engine until it starts After starting let the engine idle for 30 to 45 seconds Open and close the throttle slowly until the engine runs smoothly at idle and at full throttle Acceleration should also be smooth If acceleration is not smooth adjustments to the carburetor may be necessary see Adjustment of the Engine page 12 If your engine does not start repeat steps 2 7 O Engine Troubleshooting sx 16 If your engine fails to start after the preceding starting procedures please check the following Symptom Engine does not fire Engine starts then rpm increases till engine cuts out Diagnosis Ignition battery voltage low Battery wires faulty or loose Faulty spark plug or not firing Engine flooded Fuel not reaching engine Fix Charge or replace battery Replace wires or Re connect check connections Repla
15. ropeller Make sure that nothing can be sucked in by the propeller Never start the engine on loose gravel or sand Do not attempt to stop the engine by throwing anything into the path of the propeller Make sure the fuel line is well secured to the engine and to the fuel tank so that it won t come off in flight Do not use silicone fuel line because it will be dissolved by the fuel Use gasoline approved vinyl or neoprene rubber fuel line Always secure the fuel line away from the cylinder The engine s heat can damage the fuel line Never touch the engine immediately after a run The engine will be hot Before transporting your model remove all the fuel from the fuel tank and fuel lines Always use high quality oil intended for 2 stroke 2 cycle engines It s a good idea to use a petroleum based 2 cycle motor oil like Lawn Boy All Season Ashless Generation II oil for the break in period Break in should be considered about the first 3 5 gallons you run the engine A high quality synthetic 2 cycle oil is recommended for optimum performance and a longer engine life Synthetic 2 cycle oils leave fewer combustion byproducts than natural oil which can foul the engine and exhaust ports resulting in reduced performance Synthetic oils also reduce friction and provide more fluidity at low temperatures Do not install your throttle servo or kill switch servo inside the engine compartment Doing so could cause radio interferenc
16. rting the engine please make sure all components including the propeller and the engine mount are secure and tight It is strongly recommended that a screw sealant is used Great Planes Threadlocker GPMR6060 during engine installation During the break in period it is recommended that the engine be installed on the aircraft or a test stand with an appropriate shock absorber Otherwise it is probable that vibration could rebound back to the engine and serious damages may occur during the break in period For your safety and the safety of others please do not stand in front or in line with the propeller when the engine is running Keep onlookers away from the running engine especially small children Always use a balanced spinner and a balanced propeller An unbalanced spinner and propeller combination will cause high levels of vibration and may cause the propeller shaft to break Always use a lightweight spinner on your engine Lightweight spinners are considered to be those with a cone wall of 1mm or less Heavy spinners could cause the propeller shaft to break Securely tighten the spinner and propeller on the engine to prevent itfrom being thrown off the engine while running Never use a propeller that has hit the ground Even though it may look good from the outside it may be cracked on the inside which may cause it to disintegrate while in use Do not use a nicked cracked or split propeller Keep foreign objects away from the p
17. t area is recommended for proper engine cooling 13 Make sure the cowl is secured to the airplane and thatthe knurled thrust washer protrudes from the cowl by at least 3 2mm 1 8 O Install the Propeller 11 1 It is recommended that you test run tune and or break in the engine before flying To make this easier we recommend that you remove the cowling 2 Set the engine near the beginning of the compression stroke Note the position of the ignition magnet with the engine inverted 3 Place the spinner back plate on the engine and the propeller on the crankshaft at the one o clock position 4 Install the prop washer and 8x1 0mm adapter nut DAVQ9810 on the crankshaft 5 Install the spinner cone Be sure to use thread locker on the spinner bolt gt Adjustment of the Engine mx 12 Each DLE Engine has been factory preset However differences in elevation will influence the performance of the carburetor To obtain optimum output of the engine slight adjustment of the carburetor may be necessary Engine Functions and Adjustments E Idle 8 Choke 1 1 Choke Control the choke control should be used when the engine is cold 2 Throttle 3 Idle Adjustment Screw adjust the idle speed 4 L Low speed Needle adjusts the fuel air mixture at low speeds 5 H High speed Needle adjusts the fuel air mixture at high speeds Idle Adjustment Turning the Idle Adjustment Screw
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