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I'm Einsteining the carb side of 1946 Lauson RSC


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Old 07-12-2011, 07:18:13 PM
mschreiber mschreiber is offline
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Default I'm Einsteining the carb side of 1946 Lauson RSC

These are pics of a rsc on a jari mower. Craig and i been going around about screw in manifold and bolt on ones. This one has the cast with block threaded flange to bolt the manifold to. It looks like its separate of the block and used as a spacer with this carb. it ain't, but the carb is screwed into it. Note unused treaded holes for other applications. Another note, the choke wire going thru its guide thats fastened to the carb... u guys think this might be original?? Last note, This mower has brass mower guards, anyone seen brass ones before? thanks.



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Old 07-12-2011, 07:20:49 PM
mschreiber mschreiber is offline
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

This one doesn't use the plastic aircleaner, its the same as my rsm.



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Old 07-12-2011, 09:51:08 PM
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Craig DeShong Craig DeShong is offline
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

My literature states that the RSC-541 was equipped with carburetor part number 22267, a zenith carburetor as you show in your pictures. We have to assume that the RSC-541 Jari engine was built with this block, but the input intake was threaded for the zenith carburetor. It might be interesting to check and see if the two manifold holes are threaded; even if they are it doesnít prove anything but if they arenít, it proves that the manifold flange was never used.

My Jari has a RSC-703, and it is equipped with carburetor 21419, a Tillotson YA2A. This carburetor has an inlet tube attached to the flange.
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Old 07-12-2011, 10:34:23 PM
mschreiber mschreiber is offline
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

They're threaded as barely seen in 1st pic. What do think about simpleton choke. The wire rod is copper. How simple and functional, theres a spring pulling it off choke as soon u let go of the wire. I guess I shouldn't argue with success.
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Old 07-13-2011, 07:38:14 AM
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

That's the standard choke set-up for the this Zenith carburetor

oh- and hold onto that air cleaner mount off the Zenith carburetor, they're hard to come by.
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Old 03-18-2013, 07:04:07 PM
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

hello i also have a jari with the exact same set up, so im assuming its correct.yep also has the simple choke wire but its wire, not copper.
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Old 03-19-2013, 12:08:22 AM
Restofire Restofire is offline
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

Didn't some of these come with an unusual type Marvel Schebler ? I believe AH 22, 24, or 28 , these carbs have the 2 bolt pattern, but I believe the models they came on was standard,or deluxe and maybe not this jari. I'm for sure unclear on this but I do remember reading the application in some old Schebler literature, sorry if incorrect. Paul
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Old 03-19-2013, 04:28:03 PM
BWegher BWegher is offline
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Default Re: I'm Einsteining the carb side of 1946 Lauson RSC

Some refs show that as a Zenith Model 10
My 1956 Lauson master catalog shows Zenith carb 22267 had been replaced by Tillotson ML1b and MT types
The RSC591 does show a note to this page in the back.
Here is the scan of that page showing both versions.

http://i14.photobucket.com/albums/a3...ps5998dc70.jpg

My 1956 manual does not list Jari in the vendor list.

---------- Post added at 03:28 PM ---------- Previous post was at 03:12 PM ----------

Forgot to mention I have a Clinton 774AT (around 1948) with the same Zenith. They call it model 10D. The intake is threaded into a flange mount. The flange is bolted to the intake with a gasket. I can't tell if the flange is the same as the Lauson. The choke is operated by a rod link going below the carb to a simple hinged lever.
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