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Old 07-15-2013
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Re: Yanmar Oil Pressure Pegged

Originally Posted by fryewe View Post
I'd pull the sender and clean it as a first step.
If you can get a mechanical gauge as a test you might try that before ripping into the engine pressure relief valve. Some oil filters, maybe all, have pressure relief or by-pass valves. Maybe try a different brand and make sure they meet the engine specs.

Paul T
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