Mercruiser 5.0l overheating

jchaplain

Recruit
Joined
Aug 7, 2009
Messages
2
I have a 2002 5.0l Mercruiser with an alpha one outdrive. Raw water cooled.
New impeller, new thermostat. Runs cool at slow speeds or high speeds, but once I enter a turn at a higher speed it starts to overheat, as if it maybe started sucking air and isn't getting water through it. Any suggestions?
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,995
Ayuh,..... Welcome Aboard,....... It could be an obstruction on the hull, airiatin' the water,.....

More likely a kink in the hose from the drive to the transom, up-under by the bellows,.....

Were there any Missin' impeller blades when it was replaced,..??

If so, drop the lower unit, 'n back-flush at the in-comin' hose at the T-stat housin',.....
 
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