1964 40 hp big twin

[djwlbk]

I have a 64 40 hp big twin I tuned the ignition system and now have great spark, the compression is 102 psi on both cyclinders and I have rebuilt the carb. It will now start and run ( in a water barrel as I have much more work to do on the boat itself) but I am having trouble getting it to idle at low speed. It is as if th low idle adjstment doesnt change anything. Any suggestions?

 

[samo_ott]

Re: 1964 40 hp big twin

If the low speed adjustment doesn't do anything it's time to rebuild the carb. It means the tiny holes are probably clogged/gummed up inside. And if you have a generator on that engine it's no fun taking the carb off.