User manual YS FZ63S

[. . . ] Alter the initial 1 hour adjustment, this procedure should be performed a few every 2 hours of use. Fig. 1 Regulator Adjusting Screw To maximize engine performance and increase durability, please follow this break-in procedure: SPECIFICATIONS Bore 26. 2mm Stroke 19. 0mm Weight (engine) 460g (muffler) 33g Practical rpm 2, 000-15, 000rpm l. 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%. [. . . ] Select a good quality propeller that will turn in the 9, 000 to 12, 000 rpm range. We recommend sizes 11x7-11x9, 12x6-12x8. 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). Open the low speed needle to 1 turns from fully closed position. DIAPHRAGM AND CHECK VALVE DISASSEMBLY Diaphragm 1. Remove the adjustment screw of the valve, and then remove the inside valve and spring. Gasoline and other volatile solutions will damage the silicone if used. START UP 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. 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. Open the needle valve 2 l/2 turns from the fully closed position. 2. 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. [. . . ] Exhaust pipe Rock nuts Gasket set O ring set QTY 1 68 13 WARRANTY 70 69 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 4 1 1 1 1 1 1 1 1 1 1 1 1 1 4 11 78 11 72 73 12 7 32 6 10 5 33 80 30 2 71 74 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. [. . . ]