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No Oil Pressure on 9N

Jay My 9n starts up and runs good while cold but when it starts to heat up, it sounds like it starts to sieze up and cut off. the oil does not flow through the oil filter canister and no pressure. I have blown out the oil line and changed oil but still no pressure.
Thier is a relief valve in unit but looks like its got alot of wear. could this be the problem?
Thanks for any HELP!

Bob G If the spring looks good in the relief valve, i doubt that is the problem. Don't tink i would run it any more until you find the problem. The drive gear may be a fiber type (oringial). I would remove the front cover and check the drive gear. You should be able to get oil pressure just by cranking the motor with the key off.
If you do not have one I would get the I&T FO-4 service manual.

Good Luck

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