YS-FZ63
Contents
1. PART DESCRIPTION F6101 Crankcase F6102A Cylinder Head Assembly F6102 Cylinder Head amp Liner 1 F5103 Intake Valve 1 F5104 Exhaust Valve 1 F5105 Valve Spring Set 2 F9106 Spring Retainer Set 2 F9107 Valve Spring Retainer Clips 4 F5108 Cylinder O ring 1 F5110 Head Screws 4 F5111 Valve Cover 1 F5112 Valve Cover Gasket 1 F5113 Valve Cover Screws 2 F5114 Intake Pipe 1 F5115 Intake Pipe O ring 2 F6116 Crankshaft 1 F5117 Rear Bearing 1 F5118 Front Bearing 1 F5119 Front Bearing Oil Seal 1 F5120 Drive Washer 1 F5121 Drive Washer Retainer 1 F5122 Propeller Washer 1 F5123 Propeller Nut Set 2 F6124 Piston 1 F6125 Piston Ring 1 F6126 Wrist Pin 1 F5127 Wrist Pin Retainer 2 F5128 Rocker Arm Set 2 F1213 Tappet Adjusting Screw Set 2 F1214 Tappet Adjusting Lock Nut 2 F5131 Rocker Arm Shaft 1 F5132 Rocker Arm Screw 1 F1217 E Ring Set 2 F5134 Cam Gear 1 F5135 Cam Gear Cover 1 F5136 Cam Gear Cover O Ring 1 F1234 Cam Gear Screws 2 F5138 Cam Gear Bearing Set 2 F5139 Cam Followers Set 2 F5140 Push Rods 2 F5141 Push Rod Covers 2 F5142 Push Rod Cover O Ring 4 F5143 Con Rod 1 F5144A Back Plate Assembly F5144 Back Plate 1 F5145 Disc Valve 1 F5146 Disc Valve Pin 1 F1229 Disc Valve Set Screw 1 F5149 Back Plate Gasket 1 F5150 Back Plate Screws 2 F5151A Carburetor Assembly F5151 Carburetor Body 1 F5152 Throttle Barrel 1 F5153 Throttle Barrel Seal 1 R6124 Thorottle Barrel Retainer 1 F1260S Throttle Arm Set2. position 2 The low speed needle valve should be set after the high speed needle valve has been adjusted Close the throttle gradually to a idle approximately 2500rpm Let it idle for 20 to 30 seconds and then slowly advance the throttle The adjustment is satisfactory at low speed if transition is smooth at this time 3 If the engine is running rough on idle the low speed mixture is rich If the engine starts to speed up and dies on idle or starts to detonate when advancing the throttle the mixture is lean Turn the low speed needle valve clockwise to richen and counterclockwise for a leaner mixture note that the direction of the low speed needle valve is opposite the high speed needle valve Adjustments to the low speed needle valve should be 1 8 to 1 4 of a turn increment at a time to achieve smooth throttle response IMPORTANT The regulator adjusting screw on this engine is factory set No further adjustments are necessary If for some reason you have to disassemble the regulator assembly the regulator adjusting screw should be set flush with the regulator body TAPPET CLEARANCE ADJUSTMENT 1 Tappet clearance is factory preset No adjustment is necessary until after 1 hour of operation including break in period 2 Clearance adjustment should be done when the engine is cool When the engine temperature is high clearance is higher due to thermal expansion 3 The proper clearance setting should be at 0 04 0 1mm The adju
3. 1 F1258 Throttle Stop Screw 1 F1259 Throttle Stop Spring 1 F5158S Needle Valve Assembly F5158 Needle Valve 1 F1546 Needle Valve O ring 1 F1555 Needle Soket 1 F1256 Needle Soket O ring 2 F1557 Needle Valve Detent 1 F5163 Fuel Nipple 1 F5186 Low Speed Needle Valve 1 F5187 Low Speed Needle Valve O Ring 1 F5164 Carburetor Gasket 1 F5165 Carburetor Screws 1 F5166A Regulator Assembly 4 F5166 Regulator Body F1245 Regulator Adjusting Screw 1 F1246 Regulator Adjusting Screw O ring 1 F5169 Diaphram 1 R6138 Regulator Plunger 1 F5171 Plunger Spring 1 F5172 Regulator Screw Set 2 F5173S Muffler Set F5173A Muffler Assembly 1 F5174 Exhaust Pipe 1 F5175 Rock Nuts 2 F5180 Gasket Set 3 F5181 O Ring Set 11 WARRANTY Strict quality control is implemented by our factory in all phases from parts manufactiring to final assembly If performance deteriorates or a part fails within one year of purchase due to a manufacturing error YS will repair or replace the engine at no charge Warranty will not cover normal wear Should the engine be modified incorrectly assembled or abused there will be a normal charge for parts and labor The use of four cycle fuel due to low oil content will also void warranty YAMADA MFG CO LTD 67 Tsuchitori Inuyama Aichi 484 0917 JAPAN
4. FZ63 engine we have equipped it with a double lock system for safety 1 Mount the propeller and tighten the rear nut Next tighten the front nut as shown in Fig 1 2 Select a good quality propeller that will turn in the 9 000 to 12 000 rom range We recommend sizes 11x7 11x9 12x6 12x8 START UP 1 Remove tube B from the filter remove tube A from the check valve then fill the tank CAUTION If tank is filled or under pressure remove tube A first then tube B Fuel will eject if tube B is removed while the tank is pressurized 2 Open the needle valve 2 1 2 turns from the fully closed position 3 Open the throttle fully and slowly turn the propeller 10 times This primes the system by pressurizing the tank and sending fuel to the carburetor 4 Close the throttle to the idle position and connect the glow plug battery The engine is now ready for starting DO NOT ATTEMPT TO START FULL THROTTLE AS THIS IS VERY DANGEROUS BREAK IN To maximize engine performance and increase durability please follow this break in procedure Use the same size or slightly smaller propeller than you intend to use in flying 2 Use a good quality fuel which contains 15 30 nitromethane and oil content of 20 24 Synthetic or castor oil can be used or a combination of synthetic and castor Do not use four cycle fuel due to low oil content 3 The needle valve should be set so that the engine is running at a rich setting Run th
5. OPERATORS MANUAL Fig 1 Bore 26 2mm Valve Cover Screws Stroke 19 0mm Weight engine 460g muffler 33g Practical rom 2 000 15 000rpm 48 20 i 31 87 FEATURES The FZ63 is the most powerful 4 cycle engine of its size and was developed for sport flying as well as power demanding acrobatics e Supercharged system e Fuel injected e Regulated and pressurized fuel system e Muffler The pressurized fuel and injection system makes throttle response superior and is unaffected by tank level GLOW PLUG Select the most appropriate plug from those designed specifically for 4 cycle engines Glow plug selection greatly affects the maximum engine output and low idle We recommend the YS 4 INSTALLATION Connect the engine to the tank as shown in fig 1 Since high pressure is applied to the tank tighten all connections carefully Care must be taken to prevent pressure leakage due to under tightening of the check valve or by kinking the fuel lines 2 Always use a fuel filter We recommend the YS fuel filter 3 Match the direction of the check valve arrow fig 1 with the arrow facing to wards the tank FZ63 SPECIFICATIONS High Speed needle Valve Check Valve Tubg AQ Tubg Bi Fuel Filter Low Speed needle Valve PROPELLER INSTALLATION Due to the high torque of the
6. e engine approximately 20 minutes with this setting 4 Mount the engine to the model and fly ten times with this setting This concludes the break in procedure it is advisable to always use a slightly rich setting to keep the moving parts lubricated even after the break in period HIGH SPEED ADJUSTMENT 1 Adjustment of high speed is done by the carburetor needle valve When the needle valve is turned clockwise the mixture is leaner When it is turned counterclockwise the mixture is richer A good starting position for the high speed needle valve is 2 1 2 turns open from the fully closed position 2 When the engine is started open the throttle gradually Next find the peak position highest RPM by adjusting the needle valve Then the needle valve should be opened approximately 1 8 of a turn from full RPM to achieve best performance The engine may stop if the throttle is opened to full immediately after starting Wait until the engine temperature rises and then open the throttle slowly 3 For flying it is advisable to use a slightly richer mixture setting By using a richer mixture the engine temperature is maintained and RPM stability improves LOW SPEED ADJUSTMENT This engine is equipped with a new low speed needle valve to adjust the mixture from low to mid throttle This needle valve is located on the side of the throttle barrel opposite the throttle arm Fig 1 1 Open the low speed needle to 1 turns from fully closed
7. stment is achieved by loosening the locknut fig 2 and turning the adjusting screw Tighten the locknut after the adjustment is achieved Alter the initial 1 hour adjustment this procedure should be performed a few every 2 hours of use Fig 2 0 04 0 1mm CAM GEAR TIMING ADJUSTMENT If for some reason you have to disassemble your engine please follow these important steps on reassembling the cam gear 1 Remove the carburetor and backplate assembly Notice the impression made on the crankshaft counterweight Position it directly straight down or in line with the case outer seam line 2 When reinstalling the cam gear the side with a point mark should be facing the opening of the gear box Note that it should also be mounted with the point mark located towards the top of the engine just below the cam followers DIAPHRAGM AND CHECK VALVE DISASSEMBLY Diaphragm 1 Remove the adjustment screw of the valve and then remove the inside valve and spring 2 Clean the inside with alcohol or appropriate cleaner Reassemble 3 Screw in the regulator screw until flush with the diaphragm body Check valve 1 Open the valve by rotating the body counterclockwise 2 Reassemble the check valve carefully IMPORTANT Silicone rubber is used in many parts of the YS engine Use only glow fuel or methanol for cleaning Gasoline and other volatile solutions will damage the silicone if used aq
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