User manual YS FZ53

[. . . ] Alter the initial 1 hour adjustment, this procedure should be performed a few every 2 hours of use. To maximize engine performance and increase durability, please follow this break-in procedure: Fig. 1 SPECIFICATIONS Bore Stroke Weight (engine) (muffler) Practical rpm 24. 0mm 19. 0mm 460g 33g 2, 000-15, 000rpm l. Use the same size (or slightly smaller) propeller than you intend to use in flying. Valve Cover Screws 45 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. FEATURES The FZ53 is the most powerful 4 cycle engine of its size and was developed for sport flying as well as power demanding acrobatics. · Supercharged system · Fuel injected · Regulated and pressurized fuel system · Muffler The pressurized fuel and injection system makes throttle response superior and is unaffected by tank level. PROPELLER INSTALLATION Due to the high torque of the FZ53 engine, we have equipped it with a double lock system for safety. Select a good quality propeller that will turn in the 9, 000 to 11, 000 rpm range. We recommend sizes 10x9-10x10, 11x7-11x8, 12x7-12x8. 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). The low speed needle valve should be set after the high speed needle valve has been adjusted. 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. 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). [. . . ] Match the direction of the check valve arrow fig. 1 with the arrow facing to wards the tank. # 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 PART# F5101 F5102A F5102 F5103 F5104 F5105 F9106 F9107 F5108 F5110 F5111 F5112 F5113 F5114 F5115 F5116 F5117 F5118 F5119 F5120 F5121 F5122 F5123 F5124 F5125 F5126 F5127 F5128 F1213 F1214 F5131 F5132 F1217 F5134 F5135 F5136 F1234 F5138 F5139 F5140 F5141 F5142 F5143 F5144A F5144 F5145 F5146 F1229 F5149 F5150 F5151A F5151 F5152 F5153 R6124 F1260S F1258 F1259 F5158S F5158 F1546 F1555 F1256 F1557 F5163 F5186 F5187 F5164 F5165 F5166A F5166 F1245 F1246 F5169 R6138 F5171 F5172 F5173S F5173A F5174 F5175 F5180 F5181 DESCRIPTION Crankcase Cylinder Head Assembly Cylinder Head & Liner Intake Valve Exhaust Valve Valve Spring Set Spring Retainer Set Valve Spring Retainer Clips Cylinder O-ring Head Screws Valve Cover Valve Cover Gasket Valve Cover Screws Intake Pipe Intake Pipe O-ring Crankshaft Rear Bearing Front Bearing Front Bearing Oil Seal Drive Washer Drive Washer Retainer Propeller Washer Propeller Nut Set Piston Piston Ring Wrist Pin Wrist Pin Retainer Rocker Arm Set Tappet Adjusting Screw Set Tappet Adjusting Lock Nut Rocker Arm Shaft Rocker Arm Screw E Ring Set Cam Gear Cam Gear Cover Cam Gear Cover O-Ring Cam Gear Screws Cam Gear Bearing Set Cam Followers Set Push Rods Push Rod Covers Push Rod Cover O-Ring Con Rod Back Plate Assembly Back Plate Disc Valve Disc Valve Pin Disc Valve Set Screw Back Plate Gasket Back Plate Screws Carburetor Assembly Carburetor Body Throttle Barrel Throttle Barrel Seal Thorottle Barrel Retainer Throttle Arm Set Throttle Stop Screw Throttle Stop Spring Needle Valve Assembly Needle Valve Needle Valve O-ring Needle Soket Needle Soket O-ring Needle Valve Detent Fuel Nipple Low Speed Needle Valve Low Speed Needle Valve O-Ring Carburetor Gasket Carburetor Screws Regulator Assembly Regulator Body Regulator Adjusting Screw Regulator Adjusting Screw O-ring Diaphram Regulator Plunger Plunger Spring Regulator Screw Set Muffler Set Muffler Assembly Exhaust Pipe Rock Nuts Gasket Set O-Ring Set QTY 1 1 1 1 2 2 4 1 4 1 1 2 1 2 1 1 1 1 1 1 1 2 1 1 1 2 2 2 2 1 1 2 1 1 1 2 2 2 2 2 4 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 4 1 1 1 1 1 2 1 1 2 3 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. [. . . ]