GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.
Home » Public Forums » GMCnet » [GMCnet] Onan Not Starting...
Re: [GMCnet] Onan Not Starting... [message #166681 is a reply to message #166625] Tue, 17 April 2012 23:43 Go to previous messageGo to previous message
Kudzu is currently offline  Kudzu   United States
Messages: 377
Registered: November 2011
Location: Marshville, NC
Karma:
Senior Member
1. Yes.
2. Tried again, nada. Going to replace that hose.
3.
4. It doesn't move on it's own at all during cranking - no suction?
5. Maybe it's sitting closed and I am pushing it to WOT?

I'll try the boost.

Thanks!


On 4/17/2012 1:26 PM, Mike Miller wrote:
>
> I am assuming the numbers in the pitcure match the numbers below:
> <http://www.gmcmhphotos.com/photos/showphoto.php?photo=43877>
>
>>> 1. New fuel pump.
> -- Has it ever ran with this pump? As it is square I assume it is NOT an Onan pump. Is there a filter on the suction side of the pump? These little square pumps are easy to install backwards and do not work that way.
>
>>> 2. End of fuel line. Has the start of some splitting but
>>> it looks like it is holding a seal - I'll replace it anyway.
> -- Looks dry... as in no fuel. This area should be under pressure when operating correctly. Make sure it seals "really good."
>
>>> 3. Connection into the filter. Holding my finger over this, there is no suction at all when cranking.
> -- This is the connection into the carburetor... output of the pump.
>
>>> 4. Choke? What position is full choke, should I be dinking
>>> with this when trying to start?
> -- The engine is cold and you are trying to start. it should go fully closed when cranking and half closed when not cranking. remember that this engine starts with full-open throttle.
>
>>> 5. Throttle. When I push this, the motor cranks faster but
>>> still doesn't catch.
> -- As when you push on "this" you are closing the throttle, I do not understand why it would crank faster... :?
>
> What I would do:
>
> I know many do not like using starting fluid, but I use it to divide, the problem in half. I disconnect the breather hose (between 2 and 3 in your picture) and spray a SMALL amount into the intake side of the carb. Then crank. If the motor fires I know that the "electrical" side is working and move on to the "fuel" side of the problem.
>
> Let us know what you find. (With the dry hose, I suspect you have a problem on the fuel side. look into a small fuel can... something like a outboard motor boat tank would be best.)
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

1976 Eleganza II 1996 Chevy Impala SS 1999 Kawasaki Vulcan Nomad

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [GMCnet] GMC furnace
Next Topic: Trying to figure out things!
Goto Forum:
  


Current Time: Thu Jul 04 20:36:15 CDT 2024

Total time taken to generate the page: 0.00659 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.1.1.
Copyright ©2001-2021 FUDforum Bulletin Board Software