What am i doing wrong

C

CPB

Junior Member
Hi All,
I have been trying to get my 48 running but I'm having issues with it barley idling and missing on acceleration. Dist was checked on a machine and checks out ok. I have new plugs with the correct gap, points, wires, rebuilt carb by kt and a new electric fuel pump. The gas is fresh and new fuel lines. At idle vacuum jumps radically 13" to 15" and at a high rpm vacuum gauge reads a very steady 18" I have been lurking in the background for years and really appreciate the wealth of information all of have to offer. Thank you for all your help
 
CPB,
Will the motor continue to run with the 2 idle mixture screws turned all
the way in or nearly all the way in ?
How much up and down or back and forth slop is there when you wiggle the throttle shaft ?
Charlie ny
 
I was having problems with a V-12 after installing one piece guides and new valves, turned out one of the intake valves was tight. After allowing the engine to warm up fully, it unstuck itself. Then I dripped MMO down the carb and it hasnt stuck since. It sure sounds like you have a valve issue going on to me. I would get a bottle of Marvel Mystery Oil, the kind that goes in the gas tank or down the carb and dribble some down each side of the intake while running at a fast idle and see what happens.
 
Try a jumper wire direct to the coil ,Then try another coil .or a rotor .possible low on the list ,Manifold leak .
 
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