Ryobi pressure washer oil leak
Posted: Sun May 03, 2026 9:43 am
I've been watching this oil leak get steadily worse. It wasn't obvious where the oil was coming from but I think I found the culprit.
At first I thought I localized it to the valve/head/cam cover. So I tried to buy a gasket. There isn't one because it's RTV. Except I also learned that it's not the cover/sealing surface that leaks. There is an O-ring on a shaft that runs through the cam gear.
https://youtu.be/tzY1UAz1nXk?si=M6lxcGrSsFow75IX
https://www.partstree.com/models/gcv160 ... -pulley-1/
Ordered Honda 91301-ZM0-V3 from Amazon. None of the four O-ring assortments I have seem to have the right size.
At first I thought I localized it to the valve/head/cam cover. So I tried to buy a gasket. There isn't one because it's RTV. Except I also learned that it's not the cover/sealing surface that leaks. There is an O-ring on a shaft that runs through the cam gear.
https://youtu.be/tzY1UAz1nXk?si=M6lxcGrSsFow75IX
https://www.partstree.com/models/gcv160 ... -pulley-1/
Ordered Honda 91301-ZM0-V3 from Amazon. None of the four O-ring assortments I have seem to have the right size.