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FZ63S

1. s achieved by loosening the locknut tig 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 0 1mm 7 CAM GEAR TIMING ADJUSTMENT f 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 7 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 7 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 NO PART DESCRIPTION QTY 1 F310
2. 1 Crankcase 1 WARRANTY F3102A Cylinder head assy Se eu Hs ae Sing Strict quality control is implemented by our factory in all phases 4 F5104 Exhaust valve from parts manutactiring to final assembly 5 F5105 Valve spring set f performance deteriorates or a part fails within one year of purchase 6 F9106 Spring retainer set due to a manufacturing error YS will repair or replace the engine at no 7 F9107 Spring retainer clips charge Warranty will not cover normal wear 8 F3108 Cylinder gasket 10 F5110 Head screws 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 11 F5111 Valve cover 12 F5112 Valve cover gasket 13 F5113 Valve cover screws 14 F5114 Intake pipe 15 F5115 Intake pipe O ring 16 F6116 Crankshaft 17 F5117 Rear bearing 18 F5118 Front bearing 19 F5119 Front bearing oil seal 20 F5120 Drive washer 21 F5121 Drive washer retainer 22 F1266 Propeller washer 23 F1267 Propeller nuts 24 F3124 Piston 25 F6125 Piston ring 26 F6126 Wrist pin 27 F5127 Wrist pin retainer 28 F5128 Rocker arm set 29 F1213 Tappet adjusting screws 30 F1214 Tappet adjusting lock nuts DETAIL A 31 F5131 Rocker arm shaft 32 F5132 Rocker arm screw 33 F1217 E ring set 34 F5134 Cam gear 35 F5135 Cam gear cover 36 F513
3. 6 Cam gear cover O ring 37 F5137 Cam gear screws 38 F5138 Cam gear bearing set 39 F5139 Cam follower set 40 F5140 Push rods 41 F5141 Push rod covers 42 F5142 Push rod cover O ring set 43 F5143 Con rod F5144A Back plate assy BP BRNMINNMNNM ABAD BABINNNNM AB E N S E BoB Boe eA MAB BAO RONDA AO 44 F5144 Back plate 1 45 F5145 Disc valve 1 46 F5146 Disc valve pin 4 47 F1229 Disc valve set screw 1 49 F5149 Back plate gasket 1 50 F5150 Back plate screws 2 F5151A Carburetor assy 51 F5151 Carburetor body 1 52 F5252 Throttle barrell 1 53 F5153 Throttle barrell seal 1 54 R6124 Throttle barrell retainer 1 55 F1260S Throttle arm set 1 56 F1258 Throttle stop screw 1 57 F1259 Throttle stop spring 1 F5158S Needle valve assy 58 F5158 Needle valve 1 59 F1546 Needle valve O ring 1 60 F1555 Needle socket 1 61 F1256 Needle socket O ring set 2 62 F1557 Needle valve detent 1 63 F5163 Fuel nipple 1 64 F5186 Low speed needle valve 1 65 F5187 Low speed needle valve O ring 1 66 F5164 Carburetor gasket 1 67 F5165 Carburetor screws 4 F3168A Regulator assy 68 F3168 Regulator adjusting screw 1 69 F3169 Regulator adjusting screw O ring 1 70 F3170 Plunger spring 1 71 F3171 Plunger 1 72 F3172 Regulator body A 1 73 F3173 Diaphram 1 74 F3174 Regulator body B 1 75 F3175 Regulator bracket set 1 76 F3176 Under cover set 1 77 F3177 Under co
4. OPERATORS MANUAL Fig 1 Regulator Adjusting Sc FZ63S SPECIFICATIONS Front Nut 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 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 trom those designed specitically for 4 cycle engines Glow plug selection greatly affects the maximum engine outout and low idle We recommend the YS 4 INSTALLATION Connect the engine to the tank as shown in fig 1 Since high pressure s 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 ward s the tank Bore 26 2mm Stroke 19 0mm Weight engine 460g muffler IIg Practical rom 2 000 15 000pm High Speed N eadleV alve Fud Filter Tube B Tube A Check Valve Low Speed N eadle Valve PROPELLER INSTALLATION Due to the high torque of the FZ63 eng
5. ine 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 7 2 Selecta 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 trom the titer remove tube A trom 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 s pressurized 2 Open the needle valve 2 1 2 turns trom 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 fying 2 Use a good quality fuel which contains 15 30 nitromethane and oil content of 20 24 Synthetic or castor oll can be used or a combination of synthetic and castor Do not use four cycle fuel due to low oi content 3 The needle valve should be set so that the engine s running at a rich setting Run the engine a
6. on 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 s satisfactory at low soeed f transition Is smooth at this time 3 Ifthe engine is running rough on idle the low speed mixture is rich f 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 soeed 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 7 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 s high clearance Is higher due to thermal expansion 3 The proper clearance setting should be at 0 0 1mm The adjustment
7. pproximately 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 s turned clockwise the mixture s leaner When It is turned counterclockwise the mixture Is richer A good starting position Tor the high speed needle valve is 2 1 2 turns open from the fully closed position 2 When the engine s started open the throttle gradually Next tind the peak position highest RPM by adjusting the needle valve Then the needle valve should be opened approximately 1 8 of a turn trom full RPM to achieve best performance The engine may stop if the throttle s opened to full immediately after starting Wait until the engine temperature rises and then open the throttle slowly 3 For flying itis 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 7 Open the low speed needle to 1 turns from fully closed positi
8. ver gasket 1 F5173S Muffler set 78 F5173A Muffler assy 1 YAMADA MFG CO LTD 79 F5174 Exhaust pipe 1 67 Tsuchitori Inuyama Aichi 484 0917 JAPAN 80 F5175 Rock nuts 1 F3180 Gasket set 4 F3181 O ring set

FZ63S

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