Stutter, threatens to stall when given a lot of gas

[bsmith123]

I hear ya

I hear ya the probs can be a downer but hang in there the rewards when it all gets sorted out are somehow sweeter when you've paid your dues!

https://forum.ih8mud.com/40-55-series-tech/400659-gas-oil-disappearing-fuel-sight-glass.html

https://forum.ih8mud.com/60-series-wagons/208542-carb-sight-glass-empty.html



https://forum.ih8mud.com/40-55-series-tech/11384-running-rich.html
from the above link, last post by crawlin60
"If you are running rich all the time, your enrichment circuit could be leaking (maybe the accelerator pump) or the float could be set so high that raw fuel dribbles from the vent tubes into the airstream, and enriches the mixture beyond the ratio created by the prim and sec jets. BTW, your secondaries should be closed for the emission test (ie. the butterfly should be closed) at idle and at 2500 rpm."

 

[TravelinLight]

I can't tell if the fuel in the bowl is too low or too high to see it. If it is too high, would that cause gas to pour into the secondary? What if the fuel return line going from the carb to the fuel tank was blocked, would that cause the float to rise too high?

 

[edwjmcgrath]

I have had that exact problem before. The fitting on the return line has a small orifice in it that can get clogged. When mine got clogged the bowl overfilled and fuel overflowed into the carb throat. Pull the return fitting and check the orifice by blowing through it. It's easy enough to clean with carb cleaner and high pressure air.

 

[TravelinLight]

I will try to blow it out. I assume I should remove the other end form the gas tank before doing that. I started a new thread about this topic since these are new symptoms that came with the new carb. The old symptoms from this post were gone when the previous new carb was replaced.

New thread: https://forum.ih8mud.com/40-55-series-tech/442276-secondary-venturi-pouring-gas-into-second-barrel.html