Exhaust water hot

jcupo6

Chief Petty Officer
Joined
Jul 13, 2009
Messages
512
Just ran my 1969 7.5hp merc this morning. It fired right up and seemed to be running well. I did notice the exhaust water was pretty hot. I was able to keep my hand in the stream, so it wasn't scalding but MUCH hotter than my other 140hp I/O motor. This is my first OB, so I'm not sure if this is normal for these old Mercs or maybe running in a trash can would cause the motor to run a bit hotter?

The previous owner said the impeller was changed, but I'm going to change it again anyway. Could this a sign of some bigger issues, or just normal?

 
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