markwemple
markwemple UltraDork
4/25/17 2:49 p.m.

Replacing O-rings on my kohler's carb. (w/o spending a ton on a rebuild kit). 2 of them are just a tad too big on the of but fine on the id. These are small and I bought the smallest ones I could. Any ideas?

Dr. Hess
Dr. Hess MegaDork
4/25/17 3:36 p.m.

HF sells 2 O ring kits, one metric, one SAE. They are not expensive and have a bunch of sizes. Use one O ring and you've paid for the kit.

Otherwise, if you have one that is too long (circumference), you can cut and super-glue it to smaller.

markwemple
markwemple UltraDork
4/25/17 3:55 p.m.

It literally is too wide? OD is too big. ID is fine. These are tiny buggers. I bought the smallest ones at Ace.

Dr. Hess
Dr. Hess MegaDork
4/25/17 4:16 p.m.

Well, you can either find thinner ones or buy a kit. They make O-Ring DIY kits where you get lengths of various diameter O ring material, a razor blade, super glue and a jig. I think that while theoretically, you could thin what you have, in practice, it would be pretty hard to do and still have a functioning seal.

Oh, also, go to the auto parts store and ask to look at their AC O ring sets. That has a bunch of different sizes.

dean1484
dean1484 MegaDork
4/25/17 4:22 p.m.

How expensive is the rebuild kit? Time versus $$$ sometimes it is wise to spend a little more $$$ depending on what your time is worth.

markwemple
markwemple UltraDork
4/25/17 4:22 p.m.

Used a grinding stone on a dremel and removed the material very carefully until they just fit.

markwemple
markwemple UltraDork
4/25/17 4:23 p.m.

Rebuild kit is $60 and takes time to get it in. If this doesn't work I'm getting a new carb. Under $100.

Dusterbd13
Dusterbd13 UltimaDork
4/25/17 5:22 p.m.

Look on amazon and ebay for a carb. Usually 20 bucks there for a briggs.

dean1484
dean1484 MegaDork
4/25/17 5:42 p.m.

Got a carb for my chain saw for $12. Rebuild kit was $20. I just don't get how this happens.

BrokenYugo
BrokenYugo MegaDork
4/25/17 6:23 p.m.

What's the engine model number? The aftermarket kits are fine and a lot less than $60.

markwemple
markwemple UltraDork
4/25/17 7:08 p.m.

Kohler v twin with keihin carb. Trust me, I looked. Was shocked to find a carb for 70. Some places want near 300.

BrokenYugo
BrokenYugo MegaDork
4/25/17 7:29 p.m.

Yeah that's like saying "Chevy V8 with a 4 barrel" get the model number off the data sticker. $60 minimum for a carb gasket and seal kit can't be right, maybe for over the counter genuine Kohler parts but there are usually other options.

markwemple
markwemple UltraDork
4/25/17 7:44 p.m.

Keihin 24 053 32

jarrettp
jarrettp New Reader
4/25/17 7:57 p.m.
markwemple wrote: Replacing O-rings on my kohler's carb. (w/o spending a ton on a rebuild kit). 2 of them are just a tad too big on the of but fine on the id. These are small and I bought the smallest ones I could. Any ideas?

Measure out the necessary dimensions and order them off McMaster-Carr or another industrial supply type place.

BrokenYugo
BrokenYugo MegaDork
4/25/17 8:43 p.m.

I think this the kit you're after? Seems there isn't much demand for parts on these and the aftermarket kits are just reboxed OE ones based on the price.

http://www.ebay.com/itm/OEM-Kohler-Carburetor-Kit-2475703S-24-757-03S-24-757-03-S-7-070009-CH18-25-/252795115421?hash=item3adbc3579d:g:mDQAAOSwEzxYeo8q

Appleseed
Appleseed MegaDork
4/26/17 6:32 a.m.

If you decide to trim the O ring, put it on a wood dowel, freeze it, chuck it in a drill, and run it lightly over a fine (220?) sandpaper.

Datsun310Guy
Datsun310Guy PowerDork
4/26/17 7:06 a.m.

We fabricate a lot of rubber parts. It's next to impossible to machine rubber but the above suggestion on freezing the rubber is one of tricks.

Knurled
Knurled MegaDork
4/26/17 12:21 p.m.
Dr. Hess wrote: HF sells 2 O ring kits, one metric, one SAE. They are not expensive and have a bunch of sizes. Use one O ring and you've paid for the kit.

It's the same kit, just different units of measurement.

Yes, the metric kit is like twice as much.

fasted58
fasted58 MegaDork
4/26/17 3:01 p.m.

Fastenal has o-rings. I looked for an oddball size and it was in stock... or they can order it. Very reasonable too.

gearheadmb
gearheadmb Dork
4/26/17 3:25 p.m.

What is the id and od you are looking for?

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