Well the update is the boat ran perfect, better than before. We did a lot of other work on it but we are convinced getting the vacuum hose attached back where it belonged helped a lot at low idle. Thanks.
OK. We checked the regulator on the fuel cooler and, lo and behold, there was no vacuum hose connected to the regulator.
We are not sure how it was we left that off given how visually obvious it is when the hose is missing. We think there is a good chance that during other steps in completing...
Thanks for the feedback. We changed the pump and the regulator on the cooler system before the past boating season here in Michigan. The boat fuel pump was acting up and the new one (with the new regulator) worked well. I read in another post that the regulator may allow a higher pressure in the...
We have a 2002 Mercruiser 4.3 L MPI engine with a group of small hoses connected to a Tee at the top of the engine. We can see them connected at the top but the longest line routes to the stern and seems to be dangling free down in the bilge area, not connected to anything.
This does not make...
Hi. Thanks for the response. The pump is getting pretty noisey and has intermittent issues with starting. I have some info on the boat but already removed the pump to get a closer look. In addition to the J 1171 tag there are numbers stamped on the casing. Hopefully this will come through with...
Has anyone changed the electric fuel pump on a 2002 4.3L Mercruiser with MPI? The pump has a cooler manifold for the fuel. When searching for replacement on line I have noticed that there are some pumps that warn that one of the pump ends is 'not' threaded. This seems weird considering the...
