I've had a few of the sprint 375 motors that after checking most of the usual things and not finding anything wrong ,I've
ended up throwing them out as scrap but have taken the lower case off first to have a look and the motors have been
run with low oil at some stage as the plastic cam has very worn lobes.

I've scrapped a lot of good 4 stroke motors Norm ,not worth spending time on them it's quicker to pick up
another free mower and fix that ,a couple weekends ago I picked up a few mowers with nothing much wrong with them
and only put new oil in one ,after the weekend of getting them working they were advertised and 7 mowers sold in 7 days
and the lowest I got for a mower was $100. ,summer isn't too bad for selling but any other season I'd have to sell at $50 a mower
also didn't spend a cent to fix them apart from a little oil and fuel.

Normally I wouldn't bother picking up mowers for free but I saw one that looked way too new and went back to pick it up
an hour later and it was still there and kept finding more on the way home.

Cheers
Max.