420c... broke throttle shaft

redkneckracer · Post by **redkneckracer** » Thu Jun 09, 2011 5:36 pm

well my throttle shaft broke across the butterfly , so i took a shaft out of an old 40 carb the only difference is the little lever on the end was on th wrong side. so i changed the lever around set my load and adjusted my idle but now i can keep her from backfiring and over reving? ever since i ran the 2cyl hot shes always been bogging and sputtering and burnin a mess of fuel. starting to think about a diesel conversion. i got a nice little yanmar 2 cyl and a hatz 2 cyl air cooled that i think are narrow enough and only making i think a little over 20hp. fire away thanks

Willyr · Post by **Willyr** » Thu Jun 09, 2011 6:07 pm

Good luck!

JD440ICD2006 · Post by **JD440ICD2006** » Thu Jun 09, 2011 7:21 pm

Always enjoy seeing pictures of special drop ins like that.

Post by **Lavoy** » Thu Jun 09, 2011 9:11 pm

I must be missing something, because the lever on the throttle shaft is identical between 40 and 420 as far as I know. The difference is the length of the shaft, and the relief for the throttle plate is wider due to the 420 having a larger bore and bigger throttle plate.

redkneckracer · Post by **redkneckracer** » Fri Jun 10, 2011 4:55 pm

anyone know the exact hp and torque of the johnny popper 2 cylinder?

Post by **Lavoy** » Fri Jun 10, 2011 5:10 pm

Depends on which one, but assuming you mean 420, 30HP, about 80FT-lbs.
Lavoy

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420c... broke throttle shaft

420c... broke throttle shaft

420c throttle shaft

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