Hi PRD,
That's interesting you've had a similar experience! Unfortunately mine didn't loosen easily when it cooled so I suspect some metal transfer has taken place. It's disappointing as I'd only rebuilt it the year before & now the grass is growing so the little Victa Utility is taking it's place.
The Cox Stockman is also in bits as when I loaned it to someone the throttle butterfly came off & they didn't think of turning the motor off until the valve keeper broke. (They also accidentally cut some heavy steel pipe that was hiding in the grass, which then bent the blades & cutter disc into an unusual shape!)
Unfortunately the cast iron guide has shattered so the piston is scrap but although Briggs say the guide is cast integrally with the head & not replaceable, they are only pressed in! So I've turned down some brass stock to replace it & see how it goes.
I've also seen a Cox with the same Intek 21A engine on eBay that 'revved really fast & won't restart' so I wonder if there was a faulty batch of engines at some stage. However they both have failed at around 1,000 hours.
Last edited by LRT; 24/11/17 06:02 PM.