Engine Help > Tecumseh Engines

tvt691 won't rev

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Mower Militia:
I've got a stock tvt691. Put arc flywheel and Briggs coils on it. Bought ohv 170 carburetors and put blue emulsion tubes and brown main jets. Now the problem is when I start it full choke and wot it revs great as long as it doesn't go back to idle. It idles great as well but as soon as I give it throttle it pops and tries to die. It just won't rev up. I've sync the carbs the best I can. Checked for vacuum leaks with carb cleaner nothing. Am I missing something here?  Low side jets maybe?  Or transfer port?

George Herrin:
Arc coil gap .040 minimum. And low side ciruit needs recalibrating.

Mower Militia:
I'll double check coil gap with a feeler gauge. Just used a match book. Redline got with me on low side. Bought a dandy flywheel from him.

berthyd:
I would also double check your carb to intake and intake to head gaskets. Sounds like a leak to me. I assume being stock, the intake has not been cut to accommodate head shaving.

Bert

Mower Militia:
I sprayed carb cleaner around all the gaskets while running and no change in rpm. Ya everything stock.

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