JD 317 lawn tractor

Kow Farmer · Aug 30, 2019

Does anyone know what the thread pitch is on a engine oil drain plug on an Onan engine? Not sure what model engine I have. I just acquired this lawn tractor recently. I want to replumb the oil drain to make oil changes easier in the future. Thank you.
Kow Farmer Kurt

Bob · Aug 30, 2019

If it's the P-218G Onan that was sold by DEERE as an upgrade to the original Kohler, jdparts.com shows the main drain plug to be 1/2-13 UNC, and sealed with a nylon washer.

(This is the drain plug screwed from the bottom up into the engine base. There's some pipe plugs in other locations in the engine base that are 3/8" NPT.)

JD 317 lawn tractor

Kow Farmer

Well-known Member

Bob

Well-known Member

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