So your suggestion is that I don't get enough fuel to go from idle to high speed, due to limitation in lean fuel supply? Makes sense as a bit of choke helps to pass that stage and then all is running well.
But these carbs are really simple, the idle circuit has no adjustable needle valve and...
Thanks. Yes to good spark, carbs opening full. Tank and hose is new. All carb throttles open and close in sync . Advance timing linkage moves easy, roller ok. Compression is 9.5 to 10 bars on all 3 cylinders. Fuel pump is new and feeds all carbs evenly. Reed valves are good, gaskets carb/inlet...
Thanks for feedback. We are 99 % sure carbsvare clean, we took them apart 3 times. Compression equal on all, vacuum at carb inlet also. Timing we checked with a lamp, goes from TDC to about 18 degrees advance at max.
Floats we are not as certain, found it hard to say what is correct adjustment...
I have a 70 hp Johnson 2 stroke 1987.
When trying to accelerate a 20 ft boat from idle, the rpm increase to about 2500 rpm and no more. If more throttle is given , engine hesitates , slows down and finally dies. If I choke it, just a few light pushes and no more (solenoid type choke) , it...
