Powerboat Forums at SpeedWake banner

seawater pump locked up

1.2K views 12 replies 8 participants last post by  Tux  
#1 ·
My buddy has a 2000 Rinker 232 with a 350Mag Bravo 3.

Last weekend he went boating and when he started the boat up, the seawater pump was locked up. It had ran fine over the 4th, so he was not sure what happened. Loaded it back on the trailer and came home.

After he got home, we looked at it. The serpentine belt screeched on the pulley. We figured the impeller was toast and pulled the pump out. The pump would turn the wrong way by hand, but would not turn the correct way.

After we got it pulled out, it seemed like the impeller was in there backwards. He got a new impeller today and put it in the boat, and then was sure that the other impeller was going the wrong way.

He even turned the engine over to make sure of rotation.

The old impeller was just fine, just backwards locking it up.

Now here's the kicker, the boat has ran fine all year (he just got it this spring).

Can an impeller flip around in there and then lock itself up?

Any ideas or thoughts would be great.

Eric
 
#4 ·
I am the owner of the boat, when I removed the impeller from the housing for inspection I could find nothing wrong with the impeller or the housing. I even brought it to a mechanic for a 2nd opinion. He could find nothing wrong with it and said he would re-use it.

I did buy a new impeller kit, installed it last night and plan on starting the engine tonight. But I am a little concerned because I don't understand what happen.

Any other ideas?
 
#10 ·
After sitting for a few weeks I have had them lock up and won't turn with the serpentine belt. So reached down and turned it by hand 1st then worked fine.

Impeller should be replaced every year. Only way you can be sure it will last the season...
 
#11 ·
Tux said:
I did check that, it seem fined. I was able to turn the pully by hand and there was no wobble in the shaft.

I started it last night ran it for 10 min and everything worked right. I am confused?

Thanks
His also turned with no wobble,it was not spinning freely though.It should be able to free wheel with a slight flip of the finger.When things get hot they get tight.