Break In No idle

[mrbg]

I put a new motor in and I've run about a tank of gas through it, and I can't get to idle. I was checking it today and there was a little oil around the plug as I shut it off there was a slight bubble coming off 1 of the head studs. So I think maybe it's a airleak that's causing the no idle symptom. It runs good through the rest of the powerband. What do you think?

 

[mikedabomb]

Spray ether near any vacuum leaks. If the engine revs, fix it. If it's the exhaust leaking, don't worry about it.

Research how to adjust idle on the carb you're using. Should be pretty easy and it should only take a screw driver

 

[Purple Haze]

Usually with an air leak, the idle will be too high. Try adjusting the needle height, and check float level. Sometimes it can be something as simple as the throttle cable being out of adjustment.

 

[crassius]

any oil on or near head means a compression leak - check head gasket and check that spark plug is sealing tight