at wits end runs rough

[jeff6898]

1979 Evinrude 85HP 85999R

Rerbuilt carbs, 4 new coils, wires, Champion plugs, fuel pump, gas line and bulb.
Motor runs rough and stalls. I start it and it runs then it seems to skip and shuts off. I am going to taker it to a shop for a linc and sinc but don't want to waste my money if it won't help. ANy ideas?

 

[Benny1963]

Re: at wits end runs rough

check it for spark with spark tester should jump 7 /16 and be blue
check your timeing .

 

[quackaddict1]

Re: at wits end runs rough

Have you tinkered with your air/fuel mix? This adjustment is located on your carb, you might not be adjusted correctly here, which caused a problem in my case.

 

[jeff6898]

Re: at wits end runs rough

Spark is real strong, compression 130 all cylinders. I just put the carb back together and didn't do any adjusting so that may very well be my problem

 

[ezeke]

Re: at wits end runs rough

Nothing to adjust, it has all fixed jets. You do need to be sure that the throttle plates are opening properly antd that they are perfectly synchronized. Watch the small roll pins on the starboard sides of the carburetors. They should move together as you advance the throttle and be straight up at WOT.

Be sure the chokes are off once you get it started. The manual lever on the port side should be in automatic position.