FJ40 Carburetor Decision: 2F 1976, Non USA NOS 21100-61010 or 21100-61012?

Ackcruisers

SILVER Star
Joined
Nov 24, 2019
Messages
727
Location
MA
I found a Non USA Genreal Markets NOS 21100-61010 OEM NOS carb which was originally on my truck in 4/1976 according to this parts link. I’m now running an aftermarket H3662 version of 21100-61012. What are the differences between OEM # 21100-61010 vs OEM #21100-61012?

My distributor is small cap vacuum advance non USA #19100-61010 link here

Anyone have a point of view on which one to choose for my application if I want to go with an OEM carb.

21100-61010
023D4391-3901-4B28-B647-5A46D0C3F93B.jpg

21100-61010
8CE3C1AC-CF42-4D3F-8BF1-1F31B4FE0CA4.jpg


21100-61012
9E3811AA-384F-4B18-88C7-B3CFE578CC73.jpeg

21100-60012
51CF4651-9C58-43EF-836C-6B05930CAE81.jpeg
 

77mustard40

SILVER Star
Joined
Nov 28, 2010
Messages
1,812
Location
Austin, TX
I’m not worthy to take a shot at answering your question, but your thread caught me eye. I’m running 21100-60032 which was from 76 (I can’t remember the exact date) and Jim C was a big contributor to a thread I started when I was converting back to a stock carb, he indicated it was a good choice for my application.

Are you going to run a fuel return line? What’s prompting the change?
 

flx

Joined
Jan 4, 2019
Messages
365
Location
France
Jets may be different between the two but I don't know in which way.
The biggest functional difference I see is that the 21100-61010 has a choke breaker that the 21100-61012 does not have.
 

Ackcruisers

SILVER Star
Joined
Nov 24, 2019
Messages
727
Location
MA
I’m not worthy to take a shot at answering your question, but your thread caught me eye. I’m running 21100-60032 which was from 76 (I can’t remember the exact date) and Jim C was a big contributor to a thread I started when I was converting back to a stock carb, he indicated it was a good choice for my application.

Are you going to run a fuel return line? What’s prompting the change?
Thanks for your post. My non USA 1976 truck has no smog and no fuel return line. My current aftermarket H3362 or 21100-61012 is made in China. Almost everything on my restored truck is now Toyota except the carb. It runs well as Is but want to go with the OEM Aisin carb.
 

Ackcruisers

SILVER Star
Joined
Nov 24, 2019
Messages
727
Location
MA
Jets may be different between the two but I don't know in which way.
The biggest functional difference I see is that the 21100-61010 has a choke breaker that the 21100-61012 does not have.
Thanks. I’m not familiar with the purpose of a “choke breaker” on a de smogged 2F with a manual choke. I’m leaning towards replacing with
OEM 21100-61012.
 

mattressking

10 digits to freedom
Joined
Nov 27, 2016
Messages
2,478
Location
Idaho
Thanks. I’m not familiar with the purpose of a “choke breaker” on a de smogged 2F with a manual choke. I’m leaning towards replacing with
OEM 21100-61012.
It is for drivers who forget to close the choke knob after warming up - it forces the choke to open
 

Users who are viewing this thread

Top Bottom