I took both tractors out today to do some garden work. The old, ugly 446 worked like a champ cultivating then hilling potatoes, then disking the unplanted gardens.
The 448 was the one that got the new paint, and LOTS of new parts and rework this past winter. Hooked it up to the tiller to work a small patch behind the house and it did fine. For a while. Then it vapor locked. Again. Repeatedly.
It has a rebuilt carb, new fuel pump (broke the old one getting that nasty black rubber gas line off of it), new air filter, new fuel line from the tank forward, new porous bronze gas filter, new intake manifold and carb gaskets, and the gas line was rerouted farther away from hot areas, the heat shields were repaired to original condition, and the overheating muffler was replaced. The gas line is the yellow Tygon tubing that doesn't get hard like the old black rubber stuff. It is fastened with zip ties to keep it in place, and away from heat shields and such.
No luck. It still vapor locks. I could see the gas bubbling in the line near the carb when it died. Let it sit until it cooled off and it takes off like a new one. Right up until you work it with that tiller and the gas boils and it dies. Again. I am pretty tired of this. It doesn't do this except when I run the tiller. I did have pretty good success with the tiller since the soil was in PERFECT condition for tilling, but of course it takes 3 or 4 passes to get a decent seed bed in this clay loam.
I decided to heck with the tiller and drove toward the garage with it, but barely got out of the garden before it vapor locked again. When it had cooled a while, I went to get it and it would not start. Not even a click. Turns out that either the detents or the neutral safety switch if bent, broken, or something, and the travel control lever wouldn't move off neutral. Nor would the switch "make" to allow it to start. It can't be anything very serious in there, but it IS a B!TCH to get in there to work on it. Remove battery, drain hydraulics, remove all the wiring by the dash, take out the hydraulic tank, remove the panels, etc., etc., ad nauseum.
I got the 446 and a chain, unhooked the tiller since it was on the ground, and wife my wife steering the dead 448, I towed it to the garage door. It is cramped quarters, so I had to put the snow blade on the 446 and pushed the 448 into the garage. Did some digging in the gravel driveway, since the 448 has a holding valve and does not push easily, but it did go inside. Now the tiller is down for the season, which doesn't break my heart since it isn't very useful to me anyway, but it is IN THE WAY.
And there it will sit until next winter when I MIGHT have time to work on "Old Unreliable". Again. Repeatedly.
I HATE THIS TRACTOR!!!!
Edited by machinist, May 13, 2013 - 07:17 PM.