NH Carb Mixture Adj.

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules

Topic author
Professor Fate
Posts: 689
Joined: Tue Jan 08, 2019 12:39 am
First Name: Dan
Last Name: S
* REQUIRED* Type and Year of Model Ts owned: '23 and '26
Location: Taxachusetts
Board Member Since: 2015

NH Carb Mixture Adj.

Post by Professor Fate » Tue Jul 05, 2022 7:06 am

My friend is having trouble. The NH on his touring runs rich all the time. Mixture needle is binary and only turns fuel on and off. Trying to adjust does nothing.
Black smoke and gas soaked spark plugs. Advancing the throttle bogs the motor. Mix needle is perfect with not a mark or imperfection. Carb's been cleaned and blown out.

Why is this? Ideas?
________________
**FATE**
---------------------------
PM me if you have any Indian Motocycle parts!


speedytinc
Posts: 3839
Joined: Fri Feb 12, 2021 12:24 pm
First Name: john
Last Name: karvaly
* REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
Location: orange, ca
MTFCA Number: 14383
Board Member Since: 2020

Re: NH Carb Mixture Adj.

Post by speedytinc » Tue Jul 05, 2022 8:24 am

Check if main jet is in tight & float level & if its full of fuel.


Topic author
Professor Fate
Posts: 689
Joined: Tue Jan 08, 2019 12:39 am
First Name: Dan
Last Name: S
* REQUIRED* Type and Year of Model Ts owned: '23 and '26
Location: Taxachusetts
Board Member Since: 2015

Re: NH Carb Mixture Adj.

Post by Professor Fate » Tue Jul 05, 2022 8:52 am

Ok
Thanks
________________
**FATE**
---------------------------
PM me if you have any Indian Motocycle parts!


John kuehn
Posts: 3907
Joined: Sun Jan 06, 2019 8:00 pm
First Name: John
Last Name: Kuehn
* REQUIRED* Type and Year of Model Ts owned: 19 Roadster, 21 Touring, 24 Coupe
Location: Texas
MTFCA Number: 28924

Re: NH Carb Mixture Adj.

Post by John kuehn » Tue Jul 05, 2022 10:20 am

It could be a leaking float. Floats are soldered together and if it won’t “float” the gas level will overfill the bowl. They can get bad. From what your saying the gas is either on or off. Sounds to me the bowl completely fills up with no gas control. When the carb was cleaned was it checked to see if the needle valve is holding? The Ford service manual has a good explanation how to check it for sealing.

Read the carburetor repair section starting on page 206 and especially paragraph 888 and note fig. 440. If the needle and seat aren’t sealing it won’t run right for sure.

Hope this can help.


Topic author
Professor Fate
Posts: 689
Joined: Tue Jan 08, 2019 12:39 am
First Name: Dan
Last Name: S
* REQUIRED* Type and Year of Model Ts owned: '23 and '26
Location: Taxachusetts
Board Member Since: 2015

Re: NH Carb Mixture Adj.

Post by Professor Fate » Tue Jul 05, 2022 4:16 pm

The vendor went thru the carb and decided to send it back to their rebuilder for further eval.
________________
**FATE**
---------------------------
PM me if you have any Indian Motocycle parts!

Post Reply Previous topicNext topic