Trying to get my 55 up and running again. After cleaning out the fuel tank, purging the fuel lines and clearing out the carb it was ready to start. Once we started to the engine over, fuel was coming out of the throttle throat. Specifically out of that silver cylindrical port? Or rivet? I can’t find a description of it or for some interim repair. Any help or words of wisdom will do? Thanks, -max- Sent from my iPhone using The H.A.M.B. mobile app
this a little older but i m guessing yourhttp://chevy.oldcarmanualproject.com/shop/1949_53/06engine/6_079.HTM leaking at the throttle shaft part 43 in the pic
i am assuming six cylinder engine. if v8 still most likely the problem just different carb. tell us what the vehicle is and engine if you need advice. makes things a lot easier. welcome to the hamb
Leaks at that port. Not where the carb meets the the throttle throat Sent from my iPhone using The H.A.M.B. mobile app
Looks like the throttle bearing for the throat. So if I recall if it leaks there then there is too much fuel in the carb? Any advice will help. Sent from my iPhone using The H.A.M.B. mobile app
I think your describing a leak from the end of the throttle shaft. A pic would help as your terms are not familiar to me. If that is where it is coming from it is due to the float not sealing and overflowing gas into the throat. Either dirt, bad needle/seat or float misadjusted or stuck.
Mine did the same thing, the bowl cover (#2 in above diagram) was warped and leaked fuel down the throttle bore when engine was running and when I shut it off it would continue to leak a little and travel along the throttle shaft and out the ends. I could never get the cover to stop leaking.
The throttle shaft rotates, so sealing it might not be good. With it running look down the throat, is it spraying with throttle action, just idling is it dripping or misting. The lids warp on those, I went with a Carter YF on my 261.
These carbs are notoriously bad for warping the upper part of the casting and not sealing. There are threads here on the Hamb where guys have heated the casting 1/2’s up in the oven to some degree of success in getting them to seal again. If you look at any 216/235/261 that uses a Rochester b carb, most are weepy, not all. But it’s a common issue. I would not feel comfortable having a crab leak fuel over a hot engine and exhaust manifold. Rebuilt units are still available through nappa etc. Last time I looked it was around $200 buck with a core to exchange.
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