In my experience you must use after run oil or the bearing will quickly fail. I did a test: Ran the engine dry after use but no after run oil - the bearing had to be replaced after 10 gallons of fuel. Another Webra 1.45, where after run oil was used, still has the original bearing after 2 years - I lost track of how much fuel has been through it, but a lot. It was my primary engine until I acquired a 1.60 this season.

Lee Davis
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