lane hog wrote:
I've tested the fuel pump and filter, and both seem to be fine, so I'm moving on to pulling the carb and doing a soak.
Totally unnecessary to do all that work.....probably.
Get some Berryman's B12 Chemtool. It is made to be a carb cleaner.
Given the tests that you have already done, you should be able to get a healthy dose of that into the carb while on the machine to soak right there.
A 50/50 mix with gas fed into the fuel pump intake until it stumbles a little should do the trick.
Let it sit overnight and then run it normally for a bit to see if it is better. If it IS, put a recommended dose of B12 in the regular gas supply and pray.
When I got mine it had been neglected so bad that two attempts at professional cleaning failed and it required a new carb; about $250 installed at a Cummins dealer. I enjoyed screwing with things like that when I was younger; NO MORE. It's been running like a top with it's new carb. Well worth the money.