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[GMCnet] Onan - Vapor Lock? [message #178444]

Mon, 30 July 2012 20:04

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma:

Senior Member

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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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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[Message index]

		[GMCnet] Onan - Vapor Lock? By: USAussie on Mon, 30 July 2012 20:04
		Re: [GMCnet] Onan - Vapor Lock? By: armandminnie on Mon, 30 July 2012 20:35
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Mon, 30 July 2012 21:06
		Re: [GMCnet] Onan - Vapor Lock? By: ljdavick on Mon, 30 July 2012 20:42
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Mon, 30 July 2012 21:09
		Re: [GMCnet] Onan - Vapor Lock? By: Matt Colie on Tue, 31 July 2012 07:43
		Re: [GMCnet] Onan - Vapor Lock? By: ljdavick on Tue, 31 July 2012 11:35
		Re: [GMCnet] Onan - Vapor Lock? By: hal kading on Tue, 31 July 2012 11:56
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Tue, 31 July 2012 19:41
		Re: [GMCnet] Onan - Vapor Lock? By: Mr ERFisher on Wed, 01 August 2012 08:25
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Sun, 05 August 2012 15:15
		Re: [GMCnet] Onan - Vapor Lock? By: Ken Burton on Sun, 05 August 2012 16:03
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Sun, 05 August 2012 16:21
		Re: [GMCnet] Onan - Vapor Lock? By: Carl S. on Sun, 05 August 2012 20:37
		Re: [GMCnet] Onan - Vapor Lock? By: Ken Burton on Sun, 05 August 2012 22:39
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Mon, 06 August 2012 09:57
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Wed, 08 August 2012 23:13
		Re: [GMCnet] Onan - Vapor Lock? By: ljdavick on Thu, 09 August 2012 01:07
		Re: [GMCnet] Onan - Vapor Lock? By: Ken Burton on Thu, 09 August 2012 02:03
		Re: [GMCnet] Onan - Vapor Lock? By: Dennis sch on Mon, 30 July 2012 20:51
		Re: [GMCnet] Onan - Vapor Lock? By: Carl S. on Mon, 30 July 2012 22:54
		Re: [GMCnet] Onan - Vapor Lock? By: k2gkk on Mon, 30 July 2012 21:49
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Mon, 30 July 2012 22:32
		Re: [GMCnet] Onan - Vapor Lock? By: Ken Burton on Mon, 30 July 2012 23:49
		Re: [GMCnet] Onan - Vapor Lock? By: captjack on Mon, 30 July 2012 21:54
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Mon, 30 July 2012 22:30
		Re: [GMCnet] Onan - Vapor Lock? By: midlf on Tue, 31 July 2012 13:19
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Tue, 31 July 2012 19:30
		Re: [GMCnet] Onan - Vapor Lock? By: midlf on Tue, 31 July 2012 22:19
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Tue, 31 July 2012 22:42
		Re: [GMCnet] Onan - Vapor Lock? By: k2gkk on Tue, 31 July 2012 22:55
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Tue, 31 July 2012 23:26
		Re: [GMCnet] Onan - Vapor Lock? By: ljdavick on Wed, 01 August 2012 00:43
		Re: [GMCnet] Onan - Vapor Lock? By: USAussie on Wed, 01 August 2012 00:56
		Re: [GMCnet] Onan - Vapor Lock? By: Ken Burton on Wed, 01 August 2012 01:28
		Re: [GMCnet] Onan - Vapor Lock? By: Steven Ferguson on Wed, 01 August 2012 06:33

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