In Reply to: 8N Newbie, need advice posted by Cliff on September 04, 2020 at 15:23:49:
If you worked it hard all day it sounds like you can get by for awhile. Fouled plugs have numerous causes.
Is the tractor exhaust smokey? Internal oil leak would, exhaust would be blue. Rich fuel mixture? Rich fuel, exhaust would be black.
Have you done a compression check? 12v conversion may indicate that the previous owner used that as a bandaid for a weak (low compression) engine.
How is oil pressure both at idle and at wide open throttle (WOT)?
What brand are your spark plugs and what heat range? (what is number on the plugs)
All of these factors have an affect on engine operation and performance.
Go through all of these before considering an overhaul. Until you can answer all of these, don't spend big bucks.
Others will chime in.