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mac28
10-05-2005, 03:39 PM
What could be causing the overheating on an 89' Johnson 175 outboard? I'm thinking the impellor. Thanks.
Tom Brown
10-05-2005, 03:43 PM
impellor
Forkin' Crazy
10-05-2005, 08:23 PM
What is happening? Alarm going off? Impeller or thermostats or an obstruction. :confused:
Towndrunk
10-06-2005, 08:16 AM
Do you have a temp gauge or are you taking the alarms word for it. Older OMC's were bad about shorts to the horn. If no gauge check the horns wiring for a short. If so then disregard my opinion.
TD
riverbound
10-06-2005, 08:23 AM
I have no idea ;)
mac28
10-06-2005, 09:03 AM
Thanks, it is a boat that I am thinking about buying. Owner said last time out it was overheating. I was thinking a H2O pump impeller. I can get a good deal on the boat. I just want to make sure it is not going to be a major fix. Thanks for the wisdom.
Towndrunk
10-06-2005, 10:03 AM
Most times on an outboard it is the impeller. Take a compression test on it at the very least. The cyls need to be no more than 15 percent of each other.
mac28
10-06-2005, 10:18 AM
Thanks drunk.