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a.dumont

K482 Poor Idle

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a.dumont

Just completed a K482 rebuild. Everything is within tolerance/specs. Valves and points adjusted. New plugs gapped to spec. Timing adjusted. Brand new carburetor and air filter.

 

Runs great off idle, but will only idle if a bit of choke is added. I started the idle screw at a base adjustment of 1 1/4 turns. Still won't idle at 3+ turns.

 

I'm curious if I have a bad carb, or possibly a bad gasket between the carb and the 90 degree elbow. I did notice the gasket blocked a passage, so I punched a hole thinking it was for a vent. (See picture). Is this port supposed to be blocked?

InkedCarb_LI.jpg

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Sarge

No, that hole should be open. Sounds like you might have some gunk in the idle circuit, it's not unusual to have a new carb show up with debris in it - especially aftermarket ones. I hope with the rebuild you replaced all the fuel lines - ethanol fuel or just plain age can cause the hoses to break down over time internally, plugging up the carb.

 

Sarge

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