mestey2004
Seaman Apprentice
- Joined
- Apr 2, 2004
- Messages
- 38
I have a 305 99-01 mercruiser and a alpha one drive that I just put on the boat. All is running good, but it is over heating (at idle at the dock and running hot 165 or so with the hose). I have a closed cooling system (ie radiator fluid in the engine w/ a heat exchanger). Now the question.... I have heard of a secondary cooling/cirulating pump that assists the impeller pump in the drive to pump the water through the engine. I do not have one and it is not mentioned in my manual. Do I need one? The drive was used and I dont know what the condition/when the impeller was replaced last. If not, then I know the impeller must be bad. <br /><br />I got the drive from a mechanic and it could have been sitting around for a long time....<br /><br />Thoughts?<br /><br />thanks! Mike