Chemdawg
Petty Officer 2nd Class
- Joined
- Aug 31, 2013
- Messages
- 112
Hello everyone. Hoping someone here has seen this before and can pitch me some intel. I have the 3.0 mercruiser 4 cylinder. Went through everything, and the motor runs great. I had realized that It was getting a bit on the hot side, so I shut it down before It got too hot. I decided to check out the lower end water impeller since I didn't know the last time it was replaced.
Wow, what a mess. It was completely melted, and the upper housing was pretty messed up with all the burnt rubber. So I spent 110 bucks and bought the lower housing, upper housing, gaskets, impeller, and oil and all that stuff. Rebuilt the whole thing, and started it, and it ran great.
I rewired everything this last week, and today I went to start it again, and realized it wasn't pumping water again. Pulled off the hose that goes to the thermostat housing from the lower unit, and saw I wasn't getting any water. Put my rabbit ears on instead of using the 30 gallon tub that I normally use, and tried to force water up there, and NOTHING. So I decided since it was easy enough to do, I pulled the lower end off again, connected the rabbit ears, and turned on the water to see if it would come out the tube. NOTHING. So now I pulled off the housing for the water impeller again, and it was totally burnt to a pulp again.
I am totally confused how this could happen when everything was brand new, and was ran for maybe 15 minutes total.
Now here is how it went together. Gasket-lower housing-gasket-metal plate-gasket-impeller in housing-housing, with of course the key in there. I know it should have been together correctly, since it was pumping water the first time I put it in, and I got the assembly print from my boat shop.
So how could this have burnt out so fast? Ideas?
Wow, what a mess. It was completely melted, and the upper housing was pretty messed up with all the burnt rubber. So I spent 110 bucks and bought the lower housing, upper housing, gaskets, impeller, and oil and all that stuff. Rebuilt the whole thing, and started it, and it ran great.
I rewired everything this last week, and today I went to start it again, and realized it wasn't pumping water again. Pulled off the hose that goes to the thermostat housing from the lower unit, and saw I wasn't getting any water. Put my rabbit ears on instead of using the 30 gallon tub that I normally use, and tried to force water up there, and NOTHING. So I decided since it was easy enough to do, I pulled the lower end off again, connected the rabbit ears, and turned on the water to see if it would come out the tube. NOTHING. So now I pulled off the housing for the water impeller again, and it was totally burnt to a pulp again.
I am totally confused how this could happen when everything was brand new, and was ran for maybe 15 minutes total.
Now here is how it went together. Gasket-lower housing-gasket-metal plate-gasket-impeller in housing-housing, with of course the key in there. I know it should have been together correctly, since it was pumping water the first time I put it in, and I got the assembly print from my boat shop.
So how could this have burnt out so fast? Ideas?