IH 666 gas

I have a IH 666 gas. This winter when I go more than 1/2 throttle the engine dies. But will start right up and idle just fine. It has new plugs, wires, air-filter,cleaned sediment bowl it looked rusty. HELP!

carb needs cleaned and rebuilt. Its best to soak the carb in a carb tank after it is taken apart. I always run metal tag wire through the small orfices and jets.

(quoted from post at 03:40:38 01/31/09) I have a IH 666 gas. This winter when I go more than 1/2 throttle the engine dies. But will start right up and idle just fine. It has new plugs, wires, air-filter,cleaned sediment bowl it looked rusty. HELP!

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Been through that with my 2606. You've got rust in your tank. It blocks the inlet to your sediment bowl after a while and won't let it rev up. The fines go into your sed bowl but the big chunks plug the bottom of the tank. Pull the drain plug on your carb and let it run into a can for over 5 minutes with a good stream. If it doesn't then you have your problem. You can pull the sediment bowl and put a short piece of rubber/plastic hose over the inlet so the hose sticks up into the tank an inch or so (or find a screen to do that or I made one with window screen) and keeps the rust from plugging it. They you can try to acidize the tank or do something for the rust or just use the hose or a screen.

Absent a fuel problem, change the coil and condenser. Could be a governor problem also.

Last fall and winter I just was able to idle around on quarter to half power. Anymore power and it quit. Try to chug up a hill and it would quit. It wouldn't restart imediately, but after a couple minutes of gas filling the carb back up, then it would start. Was told here it was either gas flow or the governor. It was gas flow.

I fixed my fuel problem and then it would still run for a while and sometimes quit. Even with new points, condenser, plugs, and wire. Finally got a coil from NAPA.

Does your carb have a shut off selenoid with a wire going to it? If so, could be the selenoid going bad. I have a 756 gas. When I bought it, the previous onwer had tried cleaning the sediment bowl under the tank and was adding a screen. Big mistake- he didn"t remove one of the battery cables and while gas was draining, he touched the cable to the starter directly below the tank with his wrench -yup up in flames went the tractor. After I bought it and repairs were made, it still had the loss of power and would quit but I"d choke it and it would start, run a while and quit again. I again changed the sediment bowl added a screen. Still had the problem and it was getting worse with time-now the tractor wouldn"t keep running without being choked all the time. Finally it wouldn"t start but for a minute or two. After asking about my problem on this site, I was told to replace or remove the selenoid. No more problems since.
Yes it very well could be rust flakes in the tank or the coil, but if those aren"t the trouble, maybe the selenoid could be the cause.
Good luck-

Rust and/or crap in the tank like BC says.

Unscrew that sediment bowl assembly and you"ll find it real quick.

Allan

I do not know about a 666 but I worked on a smaller IH, may have been a 444, for a guy with about the same problem. I did all of the normal stuff. Pulgs points condenser. I di not find anything obvious. I was about to send it home when I notice the fuel fitting in the carb leaking a little so I remove the fitting to add a little teflon tape. When I removed the fitting I FOUND the problem. The fitting had a fine screen on it and the screen was full of straw and dirt from the fuel tank. Cleaned the fitting and fixed the problem.

Kent

If your weather is very cold could be iceing up the carb. Heat riser needs attention.

Our 706 did that a couple years ago, turned out that birds had built a nest in the air intake tube between the grill and the air filter.