User manual YS 50ST

[. . . ] The fuel tank is pressurized by the engine and you need to relieve the pressure. Then, disconnect tube (B) and fill between the filter and the tank. If you make a mistake in the procedure, fuel will squirt out. [. . . ] Return to low throttle and start the engine. After starting, return the main needle to its running setting before advancing the throttle. Fig. 2 High Speed 100% Hover 40% B A Low Speed 0% Check Valve 37 Tube (A) Tube (C) : 35mm BREAK-IN It is not necessary to mount this engine on a test stand for break-in. However, the engine should be adjusted slightly on the rich setting for the first few flights to ensure proper breakin. Always use a good quality fuel which contains 30% nitro and an oil content of 20-30%. FEATURES The YS 50ST Engine features the patented YS regulated fuel system for positive fuel flow during all types of flight conditions. Factory authorized parts and service available worldwide. INSTALLATION 1. The fuel lines should be connected to the fuel tank as shown in the above diagram. Be careful to install the check valve in the correct direction. Since the tank is exposed to high pressures, be sure that all connections are secure to prevent pressure leakage. Since the engine is sensitive to dirt in the fuel, a fuel filter must be used. Tube (C) should be set exactly at 35mm between the engine and the check valve. The check valve is designed exclusively for the 50ST. Use only YS factory parts for replacement. CAUTIONS 1. Take care not to touch the engine immediately after shutdown to avoid painful burns. Do not attempt to fly with engine problems as it can be dangerous. When starting the engine, do not use full throttle but set throttle to low speed before applying the glow driver. This engine is intended for helicopter use. Aircraft conversion parts are available from our service department. This engine is intended for use by experienced modelers only. [. . . ] PART# 1 2 3 4 5 6 7 8 9 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 YS5180 YS5185 YS5190 YS5195 YS5200 YS5205 YS5210 YS5215 YS5220 YS5362 YS5230 YS5235 YS1050 YS5240 YS5243 YS5245 YS5250 YS5255 YS5260 YS5270 YS5275 YS5280 YS5285 YS5290 YS5295 YS5300 YS0380 YS5305 YS5310 YS2695 YS5315 YS5320 YS2710 YS4845 YS4150 YS0200 YS5325 YS5332 YS5335 YS5340 YS5343 YS5345 YS5362 YS5365 YS2510 YS5370 YS5375 DESCRIPTION Crankcase Cylinder head Head gasket Head set screws Liner and piston set Liner piston Piston ring Wrist pin Wrist pin retainers Con rod Crankshaft Front bearing Rear bearing Drive washer spacer Prop nut Back plate Back plate O ring Back plate set screws Carburetor body Carburetor gasket Carburetor O ring Carburetor insulator Insulator set screws Insulator gasket Throttle barrel Throttle barrel retainer screw Needle valve set Needle valve Needle valve O ring Needle socket Needle socket O ring Needle valve detent Low speed needle Low speed needle O ring Throttle arm set Carburetor screws Regulator body A Regulator body B Diaghram Regulator valve Regulator O ring Regulator set screws Crankcase plug Check valve Gasket set O ring set QTY 1 1 1 6 1 1 1 1 2 1 1 1 1 1 1 1 1 4 1 1 1 1 4 1 1 1 1 1 1 3 1 1 1 1 2 1 1 1 1 1 2 1 1 2 8 30 29 31 28 33 32 19 34 25 21 37 26 41 20 22 23 24 8 40 38 9 27 4 2 3 7 9 39 6 36 10 18 16 5 17 11 13 12 14 15 42 35 1 WARRANTY Strict quality control is implemented by our factory in all phases, from parts manufacturing to final assembly. If performance deteriorates or a part fails due to a manufacturing error, YS Parts and Service will repair or replace the engine at no charge in the period of one year from date of purchase. Warranty does not cover normal maintenance. [. . . ]