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Mikuni carb DT9.9C

gene_d

Regular Contributor
I cannot get my 9.9 to run without the choke on. It starts right up with choke, but if I take the choke off, the motor starts to rev up, then stalls.
I have checked fuel lines,and have cleaned the carb several times.
One thing I don't understand.
There are 2 vent holes on the top of the carb. 1 hole is to vent the bowl,so air can escape when fuel comes in.
The other hole goes to the ventricle tube/main jet area. If I shoot carb cleaner into the hole, cleaner shoots out of the ventricle tube and the lower main jet?
Would that mean that when the motor is trying to suck fuel, the motor would get air from this hole?
Is this normal?side.jpgfront.jpg
 
Turn mixture screw in untill lightly seated (clockwise).Then back it out ccw 1 and a half turns.Seems like your's is turned all the way in and the motor is not getting fuel after the initial bit from the choke.Once you get it running some fine tuning might be needed.Check that needle is not sticking and there is fuel in the bowl.
 
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