User manual YS 61ST-2

[. . . ] On the final flight of the day, the fuel line clamp should be used to stop the engine in order to prevent rust and corrosion. 24mm 22mm 9. 95cc 540g 2, 000 ~18, 000 Idle, Hover and High needle valves all work the same way. Turning the needles clock-wise will lean the fuel mixtures and counter clock-wise will richen the fuel mixtures. Adjust as needed. FUEL AND GLOW PLUG 3. [. . . ] It is correct when you see a noticeable steady smoke trail. Adjust the high-speed needle valve to obtain slightly rich but consistent setting. We have found that the fuel and glow plugs listed below will give the best engine performance. Fuel Powermaster 30% Special Heli Blend Cool Power 30% Special Heli Blend Glow Plug Enya #3 OS #8 OS-A3 Hover Needle Fuel Filter Low Needle Tube (B) High Needle Check Valve Factory Set Do Not Adjust Tube (A) IMPORTANT! Silicone rubber is used in many parts of the YS engine. Use only glow fuel of methanol for cleaning. Gasoline and other volatile solutions will damage silicone if used. Tube (C) 3 15/16"(10cm) FEATURES The 61ST-2 is the 2nd generation of the ST series. Designed from the ground up, the 61ST-2 will meet all your helicopter competition needs. The 61ST-2 incorporated many features from the 61ST and more New short stroke piston and liner design New Carburetor with low end adjustment New Pressurized regulated and fuel injection system New 3 independent needle system Besides that add more power and you have an unbeatable performer. PLEASE NOTE that the hover position is at 40% see FIG 2. START UP 1. Always remove Tube(A) at the check valve first before fueling. The fuel tank is pressurized and you need to relieve the pressure first. Disconnected Tube-b at the filter and fill the tank. From the fully closed (clock-wise) position, turn the needle valves counter clock-wise as follows. STARTING SETTINGS / OPERATING SETTINGS Hover 1. 75open 1. 75 ~1. 50 Low 1. 25open 0. 75 ~0. 50 Full 1. 5open 1. 25 ~0. 75 3. Close the throttle to the idle position and connect the glow plug driver. The engine is now ready for starting. High Speed 100% Fig. 2 Low Speed 0% INSTALLATION 1. The fuel lines should be connected to the fuel tank as shown in the above figure. [. . . ] If performance deteriorates or a part fails due to a manufacturing error, YS 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. Should the engine be modified, incorrectly assembled or abused, there will be a normal charge for parts and labor. [. . . ]