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Re: [GMCnet] Onan - Vapor Lock? [message #178472 is a reply to message #178444] Mon, 30 July 2012 21:49 Go to previous messageGo to previous message
k2gkk is currently offline  k2gkk   United States
Messages: 4452
Registered: November 2009
Karma:
Senior Member

Hi, Rob.

Somebody here said about two or three weeks back
that O'Reilly and maybe others have a blister pack
electric fuel pump that will work great for an Onan
for just under $50!

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
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> From: robmueller@iinet.net.au
> To: gmclist@temp.gmcnet.org
> Date: Mon, 30 Jul 2012 20:04:22 -0500
> Subject: [GMCnet] Onan - Vapor Lock?
>
> G’day,
>
> It seems that whenever the OAT gets to the mid nineties the Onan plays up. When the gas is "cold" it runs just fine. As the day
> heats up or if we drive with it on it starts to hunt and then finally shuts down. If I try to restart it immediately no joy but if I
> let it sit for about 5 minutes I will start and run for a few minutes then it dies again.
>
> When I was here in February I disassembled the carb and cleaned it thoroughly which must be true as when it's cool it runs PERFECTLY
> with a voltage output of 120.
>
> Last week before we left I removed the fuel pump and disassembled it. The "piston" moved up and down in the "bore" nicely, both
> plastic check valve balls were in fine shape and moved easily.
>
> I removed the solenoid at the inlet to the pump as I reckoned it was one thing less to fail.
>
> I installed a Pertronics mod a couple of years ago and a new Onan coil.
>
> I really think this is a vapor lock problem - it was 97° in Carlsberg, NM today,
>
> Oh yeah, I did check the fuel level in both tanks and both above 1/2.
>
> As they say in this neck of the woods - any idears?
>
> Regards,
> Rob M.
> USAussie - Downunder
>
> PS - SURE GLAD I INSTALLED A SECOND ROOF AIR LAST YEAR!

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