mercruiser4.3 engine fault

[nigelandadam]

We have a mercruiser4.3 v6 1992 in a bayliner. It is running on only one bank of 3 cylinders. I'm going to do a compression test tomorrow, assuming it is OK, what else could the problem be? All 6 spark plugs are sparking OK. Thanks.

 

[Don S]

Re: mercruiser4.3 engine fault

Did this just suddenly happen or was the engine work on then it wouldn't run right?

 

[nigelandadam]

Re: mercruiser4.3 engine fault

It was running fine a week ago, then when we took it out yesterday it was like it is now.Also what sort of compression figures should I be looking for. Thanks again.

 

[Don S]

Re: mercruiser4.3 engine fault

http://www.boatfix.com/merc/Bullet/97/97_25.pdf