When you test drive it... Run it at high rpm/speed for a long time... Get it hot... This will help with backyard quick fixes...
Also I own a 2000 honda 40hp tiller...
Amazing motors... We have had a couple 50hp tillers growing up...
Only issue we ever really had was with the starters...
But we "over use" our boats...lol
And that's only a couple hundred
bucks...
Good luck with your purchase... Hope it goes well...