The Stovebolt Site Forums The Shop Area Engine Shop Carter C-RJH-08 Carburetor how to ID

OK, on my quest for a Carburetor for my 1930 Chevrolet AD Universal - Canopy Express Truck I know that it calls for a Carter C-RJH-08 150S Part Number 836300. In looking around at the Carbs how can you ID which Carter Model/ Version it is between the 125S, 136S, and 150S ?? See them listed on eBay and most never say which version/ Model.

Are they all the same casting ?? Do they all look the same, just different internals/ guts, or are there actual Physical Differences the eye can see ??

How can you identify and distinguish between them ?? 125S, 136S, and 150S

Thanks for all the input...

Its simple, you look at the number stamped on the red cardboard tag

Seriously (yes, they once did have a red cardboard tag):

125s - short, large diameter accelerator pump
136s - tall, small diameter accelerator pump
150s - tall, small diameter accelerator pump

THERE ARE OTHER, NON-CHEVROLET VERSIONS OF THE RJH-08 CASTINGS!

The internal calibrations are all different in the 136s and 150s; because the 150s has a larger venturi.

The "C" on the casting means the carburetor was produced by Chevrolet in the Bay City plant (under Carter license).

Those carbs actually built by Carter do not have the "C".

The 136s can be converted to the 150s specifications by changing the venturi and all of the jets. Unless you have the special Carter tool set, you have a 90 percent probability of breaking the venturi and all of the jets anyway. If you do have the Carter tool set, the probability of breakage drops from 90 percent to 89 percent (actually, probably 60 percent).

The two most critical pieces to examine when buying the Chevrolet version of the RJH-08 are the bowl and the float. Everything else in the carb (while expensive) is available.

And would you really believe an Ebay seller if they listed which model they were selling???

Jon.

Thanks a Million,and I take it that about 99.9% of those ID Tags are GONE ?!?! sure they did not last long.

so a Visual Difference is easily seen between the 125s & 136S/ 150S, mainly the Accelerator Pump Size & Location. But to tell the difference between a 136S & 150S comes down to internals.

I do not Believe an eBay Seller 100% on anything, hence why I am here asking and doing my homework :-)

I have seen several that did NOT have the Acc Pump... Are these rebuildable or stay away ?? And how could you tell if it is a 125S, 136S, or 150S ?? And cost for these parts to COMPLETE the carb ?? Also cost to change from a 136S to a 150S ??

I am looking for a RJH-08 150S for my 1930 Chevrolet Huckster. Do not need one right now, but always looking, just in case I find a great steal of a deal.

From my findings the average price of a complete RJH-08 150S is about $450. So what would a good price for a core carb for rebuild be worth, and then the cost to rebuild it PROPERLY to the 150S Configuration ??

What should I be looking for in a Rebuildable Carb ??\

-Figure a good solid Body/ Casting.
-Solid Non-Cracked/ Fractured Acc Pump Body.
-Solid Brass Bowl w/ no holes or fractures.

What else ??

Just weight my options !!

OK Guys... Actually got time and ran out and pulled what I had out of the box and shot some pictures.

This is what I have on hand at home right now in way of a Carburetor: Huckster: Carburetor

I know that it is a Carter RJH08 Produced by Chevrolet, as the Casting Number on the side. I also know that it is missing the Accelerator Pump. The Float and Bowl look in great shape no leaks, cracks or such. All parts move freely and easily.

My thought was to buy a RJH08-150S complete and then have it rebuilt, as I figured it would be cheaper then rebuilding this one, considering the parts i would have to buy. Or I could buy a rebuilt one from one of the Qualified - Experienced Builders on here and then offer trade/ core for this one or worst case try and sell it ??

It is not a necessity right now, as I am STILL working on the frame. Stripping, Priming, Painting. Then on to Brakes & Suspension. Trying to get a Rolling Chassis, then on to Drive Train Engine, Tranny, Rearend... Make me one of those cool 1930 Frame Go-Karts ( lol ) Milk Crate Seat and ALL !!

Any Thoughts ??

First thing to remember is the sentence in my first post:

THERE ARE OTHER, NON-CHEVROLET VERSIONS OF THE RJH-08 CASTINGS!

Now the bad news (you started asking about prices).

You can purchase a 1957 Chevrolet dual quad setup for less than a professionally restored 150s!!!

When restoring, a professional has the following approximate odds in BREAKING the following internal parts from the 150s (ALL of which must be removed for proper restoration):

Venturi - 95 %
Choker cone - 80 %
Standpipe - 100 %
Idle jet - 95 %
Main discharge nozzle - 90 %
Pump jet - 50 %
Accelerator pump assembly 50 %

The odds for a non-professional grow to roughly 100 % for each.

The good news is .....ALL of the above are available.

The bad news is ...... the list price for all of the above is about $2800.

Now when you add the probability of replacing the idle mixture screw, the throttle shaft, maybe the choke shaft, maybe the metering rod..............this is NOT an inexpensive carburetor.

The floats and the bowls are made from unobtanium which is why I posted they were the critical parts.

Once the carb is finished, it looks gorgeous on the engine; but on a scale of 1 (awful) to 10 (wonderful) it rates about a 3.

We suggest that these be placed on either a showcar or a museum car that is never started. For a driver, there are a number of less expensive, and much better carbs.

Jon.

Jon,

Just brought a '31 Chevy into the shop today. 1st thing on the list: Rebuild the carb! So this is very important to me. The client is not able to spend a lot on this truck, so I would be interested in the "less expensive, much better carbs" you speak of. Can you point me in a good direction for a more reasonable, reliable carb to replace his Carter RJH-08? That way, I don't have to try and disprove your odds of breakage!

Thanks,

-Michael

Michael - give me a call at 573-392-7378 (9-4 Mon-Wed central time). Will be happy to discuss (pro's and con's) of replacements by Carter, Stromberg, and Zenith (Tillotson also made a replacement, as did the Borg/Warner group; but cannot recommend these).

Jon.