mercruiser 120 i/o skipping and stalling

[Insufishent]

I am having an issue with my 83 larson 120 i/o it is skipping and gets worse the more throttle you give it. i have replaced the cap, rotor, plugs, wires, new petronics ignition, all new fuel line, new fuel pickup, all new gas ,water seperator, rebuilt the carb, checked the timing. The second problem is i stall after trolling for a while could be after an hour of after 6 hours. i am open to any ideas?

 

[Bondo]

Re: mercruiser 120 i/o skipping and stalling

Ayuh,.... Welcome Aboard,... Did ya do a Compression test,..?? I would,...

at 1st read, If the compression is up to snuff, I'd be lookin' at the carb again,...

 

[Insufishent]

Re: mercruiser 120 i/o skipping and stalling

ok i will try that first thing in the morning thanks will keep you posted!

 

[Insufishent]

Re: mercruiser 120 i/o skipping and stalling

compression is about 120 in every cyclinder.

 

[Bondo]

Re: mercruiser 120 i/o skipping and stalling

compression is about 120 in every cyclinder.

Ayuh,... then do the Carb again, it ain't right,...

 

[Insufishent]

Re: mercruiser 120 i/o skipping and stalling

seems rich on 1.5 turns out on the carb (rochester) adj. if i go tighter motor starts getting rough?