engine starts, but stalls after 1 or 2 mins, just chenged impeller

pocoloco

Cadet
Joined
Aug 20, 2005
Messages
23
Hello all,

Have a 4.3LH 1998 Mercruiser I/O.
I just finished putting the outdrive back on the boat after having chenged out the impeller/water pump. I also changed the U-joint bellow while I was at it.
As I went for a test run my engine had a little difficulty starting, when it did it ran for a minute or 2 before stalliung and quitting. It was worse when I reved the engine up to say 2000-3000 rpm in neutral, Iwould keep it at say 2000rpm and it would then start dropping in rpm until dying.

I don't know if this could be related to the work I did in chenging the impeller and seals and changing the bellow. I have a manual I went by and the only thing I think I did differently is add a lot of grease to the gimbal bearing and u-joints, which were like new.

Could the problem I have with the engine stalling be something toptally different from the service work on the drive and how can I narrow down the problem. Just changed out the spark plugs.

Any advice would be appreciated.
 
Top