YS 1.40 FZ sport engine problem
I have YS 1.40 FZ engine. Last week it was working great but this weekend(Today) the engine made me angry. The problem was;
İt was working very difficult then after working when I hit the throttle the engine detonates and kick backs then stops, I could not succeeded to reach up high speed. Each time I hit the throttle it detonates kick backs then stops. Dosens of time i tried. I tried to arrenge via low speed needle valve and also pump screw. All these are now not in a good position to work the engine.
My engine stays inverted position.When the engine stops I found that fuel drops a lot from the carbutareur area.
First please tell me where to check then also tell me how to set the pump screw and low speed needle valve screw from fully closed postion???
I have other 3 ea YS engines, my 91FZ makes the same , I do not know My DZ Dingo engines behaivour yet. I am fed up to deal with YS engines problems.
Urgent reccommendation is highly requested
Thaks & Regards
Ahmet KARAHAN/TURKEY