Stalls going uphill

[KMacNH]

Hi. Rebuilt my 53 NAA. Runs great except going uphill. Stalls out. Get it on level ground. Starts and runs. Go uphill in Reverse. No stall. Understand that is a float adjustment issue. What is the best method to adjust the floats? How do I know if I have the correct size floats. It’s a MS T428. Did a complete rebuild on it including floats. I just want it to go uphill. That’s the last issue. (Until the next one. I know.) Do I increase the distance from the top of the carb or decrease? Thanks a ton.

 

[Dogsix]

I had the same problem and finally cured it by going back to the original old brass float.

 

[Sean in PA]

Is the fuel line routed as per the original? Is the gas tank the original design or an after market tank with the fuel outlet in a different location? Does it still stall going uphill when the tank is completely full?

 

[KMacNH]

Is the fuel line routed as per the original? Is the gas tank the original design or an after market tank with the fuel outlet in a different location? Does it still stall going uphill when the tank is completely full?

Yes to line routing. Fuel outlet is on opposite side of carb. New fuel bowl. Tank was completely cleaned out. Power washed out. Dried and sloshed alcohol to soak up any moisture. Half full tank. Gas is 4.20 a gallon here in NH. Put 5 Gal in. Have not filled it up.

 

[sotxbill]

Occasionally it could be a coil wire or primary wire moving/loose, but usually the float setting too high or too low. On a ford 3000 it was a fuel pump bypass when going up extremely steep hills. Even had a 6700 that would have the pto cut off, while going down steep hills... floats can do many different things when your not looking.

 

[kz1000]

Chinese carburetor, use the brass floats from the old carb.

 

[Btzj02]

Similar problem here too. After I had a carburetor rebuilt by an "expert" I started having the same problem you have. After much trouble shooting I narrowed it down to the brass float sticking to the side of the bowl. I attempted to re-solder the bracket to the floats to get the float to move freely but in the end I bought a new float that ultimately solved my problem.

 

[KMacNH]

Yes. It’s fixed. Took it apart. Wriggle it. Double checked floats were level and true. Replaced the little pin that goes through back of float/hinges it. That work. As the pros here say: 1. Do you have spark? 2. Do you have fuel? Work from there.