Posted by jcip on September 13, 2009 at 16:10:57 from (72.231.145.53):
I have been tinkering on this H for some time now, convinced I have a carb. issue, but now not sure. Seems to start and run good at first, then begins to falter. It runs quite well under load. It will not idle well, it pops and flutters. At any speed with no load it acts the same. I have replaced plugs, points, dist. cap, rotor, condenser, wires. I have tried changing timing. I have rebuilt carb. involving submersion in a great cleaning solution that eats away everything, and have done this to two separate carbs. Both seem to run the same, but today I noticed with one it seems to be freezing on throttle body. This seems to coincide with when it starts to run poorly. It does help having choke closed a bit, indicating lean mixture. I put yet another carb. on today from another H that has not been run in a long time, it looked hideous, but it ran a bit better with this one, although not right yet. I tried spraying around manifold with wd-40 to see if I got any reaction, thinking maybe a manifold leak, but no changed noticed. Anyone have any ideas? I also noticed today that the H I took last carb from had a completely different manifold. It was wider it base where carb fits.The H and W-4 I had been interchanging carbs from seem to have the same manifolds. Anyone know why a change? This tractor does run well under load, but I really would like it to run well not under load, and at idle. Any help would be great! Thanks. John
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