Today, I started it in the shop and it took forever for the gas to get up to the carb, like the fuel pump isn't working so good. But, it did start, so I took it out to do some rototilling, tilled one pass at full throttle the length of the 90 foot garden and it crapped out AGAIN. Died as far as possible from the house, of course. I let it sit for a short time, removed entirely the plastic anti-splash part under the gas cap, and it started. I made it back to the other end of the garden and it died again. No fuel in the transparent fuel line, just a bubble near the gas filter. I let it sit and fetched a new-in-the-bag fuel filter, installed it, and it took forever for the fuel to pump up and fill the filter.
I limped it back to the shop with the choke full-on, and throttle just above idle. The engine "hunted", like when the governor is mal-adjusted, but it was a lack of fuel causing it. I had the hood up and was watching the fuel bubble along just a drop at a time.
When the thing first starts, it runs very well from idle to full throttle, pulled the tiller with no problem, etc. Then, it dies for lack of fuel. I think I have, A) a bad fuel pump, although it is brand new, or, B) a vacuum leak somewhere in that fuel circuit.
I DESPISE THIS TRACTOR! I have owned it for going on 6 years and NEVER had it do a lick of work yet, despite a host of TLC and hundreds of $$$ in new parts.
Work done to it so far:
Rebuilt carburetor-all jets and gaskets/cleaned and passages blown out (and no, this ain't my first rodeo on carburetors), new fuel pump (integral to the Marvel Schebler carb), new fuel filter and yellow Tygon fuel line, washed out fuel tank.
New points, plugs, starter cable, starter solenoid, much new wiring, new ignition switch, new battery (much abused by this fuel problem).
New tires (Tri ribs and rear Ags) all around, sandblast and new paint/decals, rebuilt steering/wheel bearings/PMPS/Heim joints/steering bushings/bored and bushed sector gear, new muffler, new heat shields on engine.
New hydraulic hoses on 3 point and new hydraulic quick disconnects and hoses to tiller. Oil cooler cleaned and mount repaired. All fluids changed and topped off.
Added front weights, rear wheel weights, tool box, grease gun/mount, new seat, etc.
Most of the above does not apply to the fuel problem, but it gives an idea how much work has been done and what I have spent on the infernal thing. All to have a very nice looking tractor THAT WON'T RUN!
So. I hit the key on the old 446 with rusty fenders, scorched hood, and 30 year old tires. It starts, every time. It runs until either it is out of gas or I shut it off. RELIABLY! This is disgusting. Pretty tractor won't go. Ugly tractor goes and works like a slave.
Edited by machinist, May 28, 2013 - 03:40 PM.