AQ125A Runs Rough

[raven1978]

Here's the low down, just doing the spring commissioning on my motor and have done a full tune up. New points set at 0.016, Dwell is at 62 deg, timing is at 10 btdc. This thing runs like a bag of hammers, and im not quite sure why. When it does stay running and i try to give a bit of throttle i can hear air being sucked in thru, im guessing, the carb. Now not really knowing carb'd setups very well, is it possible that the throttle linkage needs to be adjusted, or is it the idle screw in the carb etc etc etc. Also not sure if it makes a difference and could be a contributing factor or not but while running the coil is pretty hot to the touch. Any ideas on how to pursue? It runs fine on cold start up

PS I should add that it does this after a hot soak, meaning once it warms up to 180*.

 

[bb4k]

Re: AQ125A Runs Rough

Got the same set up..

1st Are you getting good spark at the spark plugs?
If you are not walk yourself back..

2nd fuel. Your pick up to the tank is on top. But picks up from bottom of tank. Water sinks. There might also be a cone filter in the pick up ( in the shaft itself). Do you have a water filter next. replace filter. Drain the bowl on carb. Drain plug on the bottom. If you store the boat with less than full water will get in there from worm to cold changes.

You can get a electric ingnition for it. No points again

 

[captmello]

Re: AQ125A Runs Rough

Did you try runnning it before doing the tune up? How'd it run then? Are the plug wires mixed up?

Is there a chance the timing belt could have jumped? Did you do a compression test by chance?