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350 CID Kodiak 5.8 L chevy marine engine has water in oil

First start up after winter. Engine started & sounded good. I closed sand trap & petcocks. After about 10 minutes idle run time I noticed temp light was on & running at 250 deg. I shut motor down and trolled back to boat ramp with trolling motor. What are the possible causes & expected repair costs of each?

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Stuck thermostat bad water pump impellar about only 2 causes first check thermo should be located in the housin where all the hoses go into the motor u can check it with a pot of boiling water and a temp gaige put in water nd see what temp it opens at shop cost estimate $85.00 with part impellar estimate depending on location $200.00

Posted on Jun 27, 2009

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Posted on Jan 02, 2017

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I have a 1985 140hp 2stroke Yamaha outboard . When I start it up it runs rough , then when it's at full throttle it stalls and the engine stops.


Take it to a Yamaha marine mechanic and get it checked for compression and a good service. it sound like a fuel starvation problem. It may need a new pump diaphragm, perhaps new spark plugs. It almost certainly needs the carbs balanced.

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Many of GM pickups that have 70,000 miles on the engine will not start due to low oil pressure or a bad low oil pressure switch. So before having a truck or car hauled off to the shop check your oil level. No need to pay $65.00 for shop charge plus the tow and one quart of oil. The location of the oil-sending unit is on the back of the block between the fire wall and motor. It has a three-wire connector. Buy a pressure switch so you can see what size wretch you will need to get it off with.
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I have a sand rail with a 1972 Ford 2.0 liter pinto motor. I had sitting over the winter and would start it up 2 times a month. It just started knocking. Changed oil and adjusted the lifters. No luck.


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Take a look at these instruction videos.

How to Winterize an Outboard boat, step by step guide in ...

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