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Smoke

M

mr_flintstone

Member
Hey guys, my 641 has been running on a Zenith 13878 carb for quite a while, and has always ran pretty good. I still have the Marvel TSX-765 that came on the tractor, but it needs a rebuild.

The other day I was baling hay, and I must have sucked something into the carb, because it started flooding, and when I pulled the breather hose, it poured gas out onto the ground. Well, I swapped to the MS carb and finished baling. Over the weekend, I took the Zenith apart, cleaned the needle and seat, and put it back together. When I put it back on the tractor, it won't accelerate properly, and when you first start it. It puffs white smoke.

I know black smoke is too rich mix, and blue smoke is burning oil, is white too lean? If so, does the Zenith adjust the same as the Marvel?
 
White smoke means you have some water in the system some place. As for adjustments they should be the same
 
OK, I got it figured out. I forgot that when I replaced the carb, I also installed a new set of universal plug wires from tractor supply. You know, the trim to fit with the little brass end caps.

I decided to check if this might be a problem. I put the old plug wires back on, and all was well again. No smoke, and it throttled like it used to. I must have not left enough wire sticking out of the end of the cable to fit through the end cap and make good contact.
 
(quoted from post at 18:57:47 10/14/14) OK, I got it figured out. I forgot that when I replaced the carb, I also installed a new set of universal plug wires from tractor supply. You know, the trim to fit with the little brass end caps.

I decided to check if this might be a problem. I put the old plug wires back on, and all was well again. No smoke, and it throttled like it used to. I must have not left enough wire sticking out of the end of the cable to fit through the end cap and make good contact.
Click to expand...

It's been a few years since I made up a set of wires but the way it was done was to trim the insulation back, leaving about a half inch of wire, bring the wire along side the untrimmed end and crimp the fitting over both, as opposed to sticking out the end.
 
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