New carb on CA floods

[Sel Larsen]

I installed a new Zenith carb from YT on our '55 Allis CA. In the cooler part of the day it seems to work well (I'm in AZ at 5000 ft. elevation). Right now we use it to pull a pumpkinfest haywagons at about 1/2 throttle - park it for 10 minutes - load wagon and then drive for 10 min. and do this all day long. Later in the day when I start it it is obviously flooded. Gas sometimes comes out the little drain hole at the bottom of the carb opening. My old carb did the same. Anyone with an answer why? Friend said it was typical of Zeniths but its messing my restored paint job on the block up!! Don't like it!
 

[old]

Check your fuel tank vent and make sure it is not clogged up. Pressure build up in the tank will cause that and as the day gets hotter so does the tank and that in turn can build up pressure and that pressure has to go some place and in this case maybe high enough to push the needle out of the seat and cause it to flood
 

[Sel Larsen]

Good thought. I'll try that. Last year the old gasket was so dried up gas would slosh out onto the tank on rough ground and mess up THAT paint and I replaced it. Maybe I did too good of a job!
 

[old]

One simple easy way to check that is when it messes up loosen the cap slowly and listen for pressure escaping from the tank. If you hear that then you know you got a problem
 

[Kip-Utah]

Sel, that's a pretty CA too!! So I can see why you don't want to mess it up! Are any of you guys from AZ coming up to the Regional EDGE Show in Cedar City next week? Kip
 

[John B.]

If your cap vent isn't clogged and working properly, pull the carb apart and check to make sure the seat is screwed into the carb body tight, make sure there is a gasket on the seat too! I've had so many people bring their carbs to me and tell me it drips. I ask them if it's new or if some one has had it apart. Most of the time it was one or the other. Many times there were no gaskets on the back of the seat or it wasn't tight in the body. Once that is all okay check your sediment bowl and make sure it has a screen on the top of it so no debris gets to the carb and causes your needle to remain open.
If your cap vent is clogged that can be dangerous and cause an explosion, this is why back in the early 1980's IH came out with free gas caps for older tractors that didn't have the new style cap.
 

[Sel Larsen]

Thanks Kip for the good words. Your B (if I recall correctly) was not too shabby either! I don't personally know of anyone going your way fro the Mile High Club or the Phoenix club. I'd love to but other obligations keep us close in Prescott. Hope you have a great show and wonderful holidays!!