In Reply to: carb posted by Poneykeg on May 10, 2019 at 09:10:21:
Size doesn't matter. An engine is an engine in this case. Three things required: Fuel/Spark/Compression. Did tractor run OK when you first tried it? Battery needs to be tested by a starter shop for specific gravity. If it won't sustain a full charge under load, it needs to be replaced. How old is it? Good,correct battery cables are essential but if the battery is junk, a moot point. Is the electrical system OEM 6V/POS GRN or has it been jerry rigged to 12V? Get a copy of 'WIRING PICTOGRAMS by JMOR' from our HOW-TO's forum and find your setup to verify the wiring is correct. As JMOR said, perform the spark test first. If you have spark, move on to the fuel flow test. Compression is always the last thing but most problems are one or both of the first two mentioned. Once you determine true root cause problem(s) and fix, you can concentrate on rebuilding the carb and distributor and doing a tune-up but avoid just replacing parts with new ones until identifying the problems is resolved. Rebuilding the original parts is always the first choice when working on these old Fords. Second choice is to find an original used part online like on ebay and buy it and then rebuild it. Avoid buying any parts made 'new' as most are junk. Having the essential manuals is also important. The original 600/800 Operator's Manual is filled with valuable information and some do it yourself procedures for maintaining basic systems. The I&T FO-20 manual is also a huge tool for the 800 to have.