Re: 1972 Johnson 2hp – low speed and idle problem

[stan-k]

quote Pappy:

Stan, that looks like the carb bowl I was thinking about. If so, there is no way to run a wire through the idle circuit on that carb and there is a great chance it is plugged up. The circuit takes a 90 degree turn in the fuel bowl.
The only way to clean that circuit is to either let the bowl sit in cleaner for ??? until it is clean or drill the lead shot out of the other side with a 1/16″ bit and let the bit cross the nozzle well and clean out the passageway on the other side.
Pull your bowl again and see if it is plugged there. Won’t take long on a 2hp.
Also interested in the answer to Fleetwin’s question.

Yes, you’re right about not being able to trace that 90 deg. path, but I had the carb well cleaned (ultrasonic) and I also tested it with air pressure and it seems unobstructed. I also removed the top core plug for access (all clear). I have the carb all apart now and did a thorough examination…very clean.

Would the level of fuel in the bowl effect the flow to the low speed fuel supply? The reason I ask is because I noticed the float did need some adjustment, so now it is sitting level with the face of the bowl casting. If you think it may have some effect, then I’ll put it back together and test it again. Doesn’t take long…I’m almost able to assemble this motor blind folded by now.

Thanks.