so i'm looking at buying a 425. owner says it has low compression. its a 94, so i think it has a plastic cam. i don't mind having a winter project to work on, especially if i end up with a tractor i can put a FEL on eventually.
so, could the plastic cam be causing the low compression?
is there anything else i should look at when i see it in person (without taking anything apart)?
The compression will show low if checked when the engine is cold, so it might be OK. You have to check it warm, and 160 PSI is the minimum, with a good one being @ 200-220 PSI. Definately a plastic cam. Hours?