Replacing Onan KV-C Carb

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Don S - 17 Nov 2005 17:01 GMT

I have an Onan Microlite 2.8 Series KV-C that is surging. I have
replaced the spark plug, run about a quart of Berrymans mixed 50:50
with gasoline through it, and "toyed" with the altitude mixture
adjustment.

The local Onan dealer says they don't repair these, just replace the
carb.

The carburetor looks pretty accessible. Are there any surprises I'll
encounter if I buy a new carb & replace it myself? Are there any
adjustments I may have overlooked?

Thanks!

Don S
Dallas, TX

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Jim - 17 Nov 2005 18:15 GMT

Replacing Onan KV-C Carb

Group: alt.rv Date: Thu, Nov 17, 2005, 5:01pm (EST+5) From:
nomailhere@nomail.com (Don S)

>I have an Onan Microlite 2.8 Series KV-C that
> is surging. I have replaced the spark plug, run
> about a quart of Berrymans mixed 50:50 with
> gasoline through it, and "toyed" with the
> altitude mixture adjustment.

..

Don, don't know how difficult the carb replacement is, but a maybe a
tip, FWIW. I had the same problem on a 2.8, and used straight Techron
(I'm assuming that Berryman's is a fuel system cleaner, also). I put it
into the carb by filling the fuel filter housing with it using a
syringe. I figure that it was diluted to about 50-50 by the fuel
pushing it in, and what was already in the bowl.

The key for me was _letting it sit_. I ran the engine very briefly
each day to pull some fresh Techron into the carb, then let it sit
overnight. Literally cranked it 'til it started, then immediately shut
it off each day. I did this for four or five days, and refilled the
Techron mid-week. Then I put two cans of Techron into about 20 gallons
in the tank, drove on a rough road to mix, and ran the generator for
several hours. That was about a year ago, and it 's still running
fine.

It just depends on how much patience you've got; mine is under a
Roadtrek Chevy in an Onan sound enclosure box. I didn't want to try to
get all the springs and such hooked back up thru the little 'access'
door, or drop the whole thing.

Jim, "'Good morning' is an oxymoron."

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Don S - 17 Nov 2005 18:54 GMT

>Replacing Onan KV-C Carb
>
[quoted text clipped - 30 lines]
>
>Jim, "'Good morning' is an oxymoron."

Jim,

Thanks for the input. At about $200 for the carb & $85 an hour for
labor, I can find a lot of patience.

Berryman's is a carb cleaner. I mixed it in a container with gas and
dipped my generator fuel line in it. (I too have a Roadtrek & the fuel
line connected to the main gas tank under the rear seat).

I'll keep letting it feed on the mix a little each day & see what
happens.

Thanks,

Don S

PS: I like your tag line. What is a morning?

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JerryD(upstateNY) - 18 Nov 2005 00:50 GMT

> The local Onan dealer says they don't repair these, just replace the carb.
> The carburetor looks pretty accessible. Are there any surprises I'll
> encounter if I buy a new carb & replace it myself? Are there any
> adjustments I may have overlooked?

I had the same problem with my generator.
The dealer said the same thing.....they have to replace the carb.
On the older engines there was a mixture adjustment screw on the crabs.
Where the screw usually was, there was a piece of plastic.
I pried the plastic off and under it was a mixture adjustment screw.
It didn't have a spring under it like the old ones did and when the engine
was running the screw would vibrate out. ( the piece of plastic held it in
place)
I took out the screw and crushed the threads a little with some pliers and
screwed it back in.
When I adjusted it to where the engine ran good, the screw stayed in place.
It's run fine for 2 years.
Check and see if you have the same thing.
It can't hurt anything to try.

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JerryD(upstateNY)

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