1979 35 hp evinrude throttles good out of water but its cut in half in water?????

[Tattoo_Topher]

it starts and runs good til I put it in gear in the water that I cant get past 10 mph.

 

[HighTrim]

Re: 1979 35 hp evinrude throttles good out of water but its cut in half in water?????

Have you tested the spark and compression?

 

[Tattoo_Topher]

Re: 1979 35 hp evinrude throttles good out of water but its cut in half in water?????

checked spark but not compression

 

[F_R]

Re: 1979 35 hp evinrude throttles good out of water but its cut in half in water?????

It's running on one cylinder. Has to be either a compression problem or an ignition problem, or water getting into the cylinder. How did you test the spark? It needs to be able to jump a 7/16" gap. Disconnect and ground one plug wire and run it. Repeat with the other wire. It probably won't run at all with the good one disconnected. That will tell you which cylinder isn't working so you can zero in on it.

 

[Tattoo_Topher]

Re: 1979 35 hp evinrude throttles good out of water but its cut in half in water?????

both cylinders have great spark. how do i check the compression without a gauge?

 

[F_R]

Re: 1979 35 hp evinrude throttles good out of water but its cut in half in water?????

Put your thumb over the hole. That's only for people that know what to expect. Compression gages are cheap.

 

[Tattoo_Topher]

Re: 1979 35 hp evinrude throttles good out of water but its cut in half in water?????

thanks alot!