I have a 69 Carb and after many adjustments I have found apparently due to the seating the needle needs to be a solid needle for the float cut off - Apparently the needle with the spring can cause issues such as what I have experienced
Below is what I have found out so far - May or may night be correct but verified with Mikes Carburetors
Maybe a LC Guru can chime in as well
I ordered a Rebuild kit several months ago from Cruiser Outfitters and it actually included a needle with the spring (I'm taking this out tonight)
I have an old solid needle and have ordered another one from Mikes Carbs (see attached)
Hope this info might help others out with this wonky Carb !
For the ultra-specific 3/69 to 9/69 Aisan 2-barrel carburetor, you must use an all-metal solid float needle.
This specific 6-month window is a notorious anomaly in Land Cruiser history. I apologize for the confusion in my previous response—I mistakenly grouped this exact window into the post-September 1969 design, but you have the rare, highly distinct transition model. [1, 2]
The 3/69 – 9/69 Carburetor Anomaly
During this exact 6-month production run, Toyota introduced its first 2-barrel Aisan carburetor for the F engine. However, it used a specialized float and needle configuration that was completely unique to this timeframe: [1, 2]
Crucial Rebuild Advice for this Window
Because of this 6-month design split, standard auto parts store listings are completely unreliable for your truck.
Below is what I have found out so far - May or may night be correct but verified with Mikes Carburetors
Maybe a LC Guru can chime in as well
I ordered a Rebuild kit several months ago from Cruiser Outfitters and it actually included a needle with the spring (I'm taking this out tonight)
I have an old solid needle and have ordered another one from Mikes Carbs (see attached)
Hope this info might help others out with this wonky Carb !
For the ultra-specific 3/69 to 9/69 Aisan 2-barrel carburetor, you must use an all-metal solid float needle.
This specific 6-month window is a notorious anomaly in Land Cruiser history. I apologize for the confusion in my previous response—I mistakenly grouped this exact window into the post-September 1969 design, but you have the rare, highly distinct transition model. [1, 2]
The 3/69 – 9/69 Carburetor Anomaly
During this exact 6-month production run, Toyota introduced its first 2-barrel Aisan carburetor for the F engine. However, it used a specialized float and needle configuration that was completely unique to this timeframe: [1, 2]
- No Wire Pull-Clip: Unlike later 2-barrel Aisan carburetors, the 3/69 to 9/69 version does not clip the needle to the float lever using a wire hook.
- The Weighted Solid Needle: Because there is no mechanical clip pulling the needle down when the float drops, the system relies strictly on a heavy, solid-metal needle that drops down out of the seat by its own gravity.
- Why Viton Fails Here: If you install a modern rubber-tipped Viton needle into this specific carburetor, the rubber tip creates stiction against the brass seat. Because there is no wire pull-clip to force it open, the lightweight Viton needle will stick closed in the seat, causing your carburetor bowl to run dry and your engine to stall out.
Crucial Rebuild Advice for this Window
Because of this 6-month design split, standard auto parts store listings are completely unreliable for your truck.
- Ordering Kits: If you purchase a generic "1969 Land Cruiser 2BBL" or "1970 Land Cruiser" rebuild kit from common retail chains, it will almost certainly arrive with a Viton needle and a wire clip designed for post-9/69 models. [1]
- What to look for: You need a specialized vintage kit that specifies compatibility with Toyota OEM Float #21209-60010. These kits include the heavily weighted, all-metal solid needle. [1, 2]
- Sealing Precaution: Because you are using a solid metal needle against a brass seat, ensure the mating surfaces are immaculate. If you experience flooding, use a brass-safe metal polish on a cotton swab to clean the inner walls of the seat so the solid needle can slide up and down freely without catching.
