I posted some about this yesterday. Just to make it clear I know very little about engines and carburetors so I may need directions to be broken down barney style. The problem I am having is that the motor will start up and run just fine at high rmp if I start it with the throttle up till the butterfly is open. It begins to run rough and will die when I get close to bring the throttle the whole way down. I have cleaned the carb and it seemed that all orifices were clear. The s/s needle valve was set at 3.4 turns from seat. I set it to 1.5 turns and it still wont run at idle. The plugs were black and dirty when I changed them out.
I am including a picture of where the butterfly begins to open. What are the two notches for on the plastic part(don't know name)? Should it start to open at those notches?
I thought this could be fuel pump bit it runs excellent under high rpm's. Maybe a weak fuel pump?
I am including a picture of where the butterfly begins to open. What are the two notches for on the plastic part(don't know name)? Should it start to open at those notches?
I thought this could be fuel pump bit it runs excellent under high rpm's. Maybe a weak fuel pump?