Aisin/Chinese carburetor hybrid rebuild kit?

[dmtfab]

After a bit of searching and some head scratching, I think the PO of my FJ40 may have taken the bowl cover from the OEM Aisin carb and put it on the top of a Chinese clone. I am doing a tune up and after setting valve lash, setting timing, setting points gap, plug gaps and filters, I am not able to get a steady idle of 650 RPM. It bounces around 650-800 for a few minutes and then eventually drops to 350-400 and dies. I am going to tear the dirty carb apart and see what treasures I find inside...

I have a 6/1976 FJ40 and the bowl cover on my carburetor has a date code 6 F 8 and a metal tag with H3662.

The bowl cover appears to be older than the rest of the carb and it has the banjo fitting for the fuel return. The bowl does not have the Aisin logo near the sight glass. I believe the PO put the OEM carb bowl cover on the chinese carb so they would have the fuel return.

I am trying to find the correct rebuild kit for this carb. I have used Mikes Carburetor Parts for rebuild kits for years. They have have a kit (K4422) that supposedly covers 75-87 Aisin 2 barrel carbs. I have looked at Cruiser TEQ as well, but their kit does not appear to include the gaskets for the base (CARB61024).

Does anyone have any insight they could offer as far as which rebuild kit might cover my needs? I will eventually get an Aisin carb to restore and install, but for the moment I just want to get what I have working (if possible).

 

[charliemeyer007]

I'd say almost every carb kit I ever bought had extra and missing parts. Making gaskets is a basic and useful skill. Having several thickness of gasket material is handy. A couple of o-ring kits is useful too.

 

[ranchdawg]

The Cruiser Teq site offered two kits for my 6/75 carb, one of which was more comprehensive, and neither of which had the base gaskets.

Got my base gaskets from City Racer.

Carburetor Base Gasket for '69 to '87 Land Cruiser FJ40 FJ45 FJ55 FJ60

Carburetor base gasket for 3/'69 to 8/'87 Toyota Land Cruiser FJ40, FJ45, FJ55, FJ60 with 2 barrel carburetor. This gasket fits beneath the base of the carburetor and atop the carb insulator. It was never offered as an individual part by Toyota, as it came melded on top of the carb insulator.

www.cityracerllc.com

 

[Pighead]

Got my base gaskets from City Racer.

I got that phenolic spacer between the carb and manifold, I don't use those gaskets.

 

[dmtfab]

I'd say almost every carb kit I ever bought had extra and missing parts. Making gaskets is a basic and useful skill. Having several thickness of gasket material is handy. A couple of o-ring kits is useful too.

I anticipate the extra and missing parts. It appears there are many different options for the Aisin carbs, so I was making an assumption that there are more model specific kits. I have lots of gasket material in our shop and o-ring kits ready to go.

 

[Spike Strip]

The metal tag H3662 is the Aisan number for the 21100-61012 world carb and all the aftermarket Chi-carbs use that number. Looks like someone used the Air Horn from the old Aisan carb on the CCP replacement so they could hook up the fuel return line. The CCP 61012 carb wouldn't have that fitting.

Any late 2F kit should work fine. The gaskets are the same. Jets will differ depending on kit and if it even contains jets. Personally, I like the kits that have the leather plunger, which is actually more durable than the Viton when using ethanol-gas . It really takes two different kits to get all the good bits, like a leather plunger AND a needle/seat with a built-on fine mesh screen filter and metal ring gaskets instead of the fiber ones.

NAPCO are the best but not available in the USA unless you order off fleabay from SE Asia where they've been sitting in a humid enviro for who knows how bloody long.

From Hemmings a few years ago:

Feature	Leather Plunger	Rubber/Viton Plunger
Ethanol Resistance	Excellent (Does not swell)	Poor to Moderate (Prone to swelling)
Longevity	Very High (Can last decades)	Low to Medium (Degrades faster)
Dry Storage	Can dry out (Requires re-soaking)	Does not dry out
Bore Tolerance	High (Expands to fit worn walls)	Low (Requires a perfect bore)