Sight unseen? Twenty bucks max, and be prepared to have to scrounge low cost parts (likely used) that will cost you twice that to get it running well.
If the outside shows no damage, then a little more. If the screws have never been removed (original style and not marked up) then a couple bucks more.
If has hit the ground (pavement) then 10 or 15 bucks max. It may never have run again. The crank may be bent or the case cracked. If you get to look at it closely and the crank shows no dings on the end, well.....
I will say that an old Fox that is stuck is a better deal than more recent engines, especially R/C engines. The reason is that it was likely run on a fuel with a lot of castor. And a gummed up engine is almost the equivalent of storing it in cosmoline and can be dealt with, a rusted one--especially one with ball bearings--is going to need more replacement parts.
If the outside is not busted up, then the next thing to look at is the compression. As Dane said, a Fox can be "weary." After that, look at the main bearing fit. Check it at TDC and 90 degrees from TDC using a prop as a lever and compare the wobble. If the engine won't turn, then you don't get an assessment of the compression or the main bearing. So 20 bucks, max.
What Danish said about the needle valve. If you have to replace it, the deal starts to cost what a clean engine cost, but one that you could have determined if there was a compression or bearing problem.
The deal has to be cheap because the risk is high.
On the other hand, if you gotta have a Fox 40, and this one is somehow the very one you gotta have, then the sky is the limit....
Divot McSlow
Topic: Mid 70s Fox .40 pb cL engine stuck tight with dried lol Value? (Read 650 times)
