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Hello out there. I just picked up my new toy , its a 1953 M37 in fair condition as far as I can tell so far. I just started to pull it apart.
It runs well but it spits and back fires if I give it too much throttle too fast.
I figured it may be the accelerator pump.
This carb is a Carter B&B and has the vacuum operated style pump.
I took the top lid off the carb and found it to be very clean inside as if it has been looked at at some point.
What I found was that if I pumped the accelerator piston by hand gas does NOT come out the jet in the throat it squirts out of a small drill hole at the back end of the accelerator jet area where the screw cap is . It squirts up into a chamber that seems to be conected to the float bowl vent.
If I put my finger on the drill hole the gas then squirts out the jet.
My question is " should that hole be blocked" ? Was this carb never right ? I have taken a good close up of it but I have not been able to load a picture on a url with the system I have up here in the woods of Pa. I can email anyone a photo if they think they can help
Thank you , Alan in North central Pa.
It runs well but it spits and back fires if I give it too much throttle too fast.
I figured it may be the accelerator pump.
This carb is a Carter B&B and has the vacuum operated style pump.
I took the top lid off the carb and found it to be very clean inside as if it has been looked at at some point.
What I found was that if I pumped the accelerator piston by hand gas does NOT come out the jet in the throat it squirts out of a small drill hole at the back end of the accelerator jet area where the screw cap is . It squirts up into a chamber that seems to be conected to the float bowl vent.
If I put my finger on the drill hole the gas then squirts out the jet.
My question is " should that hole be blocked" ? Was this carb never right ? I have taken a good close up of it but I have not been able to load a picture on a url with the system I have up here in the woods of Pa. I can email anyone a photo if they think they can help
Thank you , Alan in North central Pa.
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