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Leaking carburetor NH125
Posted: Sun May 31, 2020 7:11 am
by sculpt
I've been putting a NH125 back together that had been trashed with only has 791 miles on it. The fuel tank and carburetor with new fuel lines have been labor intensively cleaned as it had gas sitting in it for over30 years. Starts up now right away but after I turn it off there is a small amount of fuel that runs out of the fuel overflow tube. The petcock has been replaced with a new one. What should I be looking for in order to solve this problem?
Re: Leaking carburetor NH125
Posted: Sun May 31, 2020 9:48 am
by bonesv
There’s an metal adjustment tang on the float to set the height but it’s best to look up the specs in the service manual first for correct measurement. You have to remove the carb to do this.
Re: Leaking carburetor NH125
Posted: Sun May 31, 2020 1:44 pm
by motormike
It is possible that the float height is set too high, and the fuel escaping through overflow is the excess amount running off.
It is also possible that the brass tube in the bowl for the overflow has split over the years from water in the bowl freezing.
Examine closely for a split...can usually be soldered to repair or replaced.
Re: Leaking carburetor NH125
Posted: Sun May 31, 2020 11:02 pm
by sculpt
Thank you both. I will give both the float and the tube my attention. It's nice to know where the problem might be.
Re: Leaking carburetor NH125
Posted: Tue Aug 18, 2020 12:11 am
by motormike
I'm sorry if my comment about float being set to high gave you the wrong idea about floats being adjustable.
I'm old, and have adjusted a lot of floats, but I had no idea if the float in question was the kind that could be adjusted.
Obviously, we have covered this issue now in your recent thread....motor