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Aisan FJ40 Carbs

 

 

Year

 

Carb Model

Notes

Jet Sizes/Flow Rates other facts
1951-1969

Single Barrel

Two versions: Large fuel viewing window and small fuel viewing window

1969-1974
Double Barrel

Mechanical secondaries, no emmisions, tall insulator block, no fuel return line

1975-1987
Double Barrel

Vacuum secondaries , emmisions

Note: Date code location changed in 1979 to the front edge of the air horn!

on my 78 2f sizes are 126 pri, 160 sec,on my usa carb , however on the nonusa carb sizes are 141 pri, 160,secondary
these were in the acces holders, i assume these smaller jets are for high altitude

The 1976 Carb flows 425CFM '76 carb.

The 79 is a sub-optimal carb configuration it only flows 350CFM



Identifying YOUR Aisan Carb

Here's some useful info that applies to all Toyota vehicles. The date of manufacture on any Aisan carburetor from 1963 to the present is stamped in small letters on the top front of the carb. The format is Y M DD.

Y is a single digit for the year,

M is a single letter for the month with A= Jan, B=Feb C=MArch and so on

DD is two digits for the date.

A carb with the code <6 F 22> would have been manufactured on the 22nd day of June of a year ending in 6. It's up to you to figure out if it is '76 or '86 or '96.

This code also applies to throttle bodies on all Toyotas and some Aisan manufactured fuel pumps.

Carbs prior to 1963 have a funky letter code that I have not figured out yet. If anyone has any information on this code contact me with it please! fj40jim@aol.com

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