| Re: [GMCnet] Onan Not Starting - UPDATE... [message #169290 is a reply to message #166597] |
Fri, 11 May 2012 17:35   |
Kudzu
Messages: 377
Registered: November 2011
Location: Marshville, NC
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Well, got the genny running by gravity feeding gas (had to literally
fill the hose with gas before it would fire and then it would just
consume the gas in the hose and then die). I also gave the fuel pump a
good wack. I don't know if that helped but it felt good. Starts right
up, we'll see if it does so in the morning too.
Now to work out why the AC doesn't work when the genny is running...
Dan in NC
Caregiver to a 1976 Eleganza II
"Tzetze Fly"
On 4/17/2012 10:19 AM, Daniel Jarvis wrote:
> Onan has a fuel primer with interior switch and that seems to work.
> Jumped connectors 5 and 9 and can hear the whirl of the fuel pump. Last
> time it didn't start may have been due to the< 1/4 tank but I'm at>
> 3/4 now. Generator will crank and crank but just doesn't want to fire
> up. Thoughts?
>
> Dan in NC
> Caregiver to a 1976 Eleganza II
> "Tzetze Fly"
>
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1976 Eleganza II
1996 Chevy Impala SS
1999 Kawasaki Vulcan Nomad
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| Re: [GMCnet] Onan Not Starting - UPDATE... [message #169299 is a reply to message #169290] |
Fri, 11 May 2012 19:52 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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| Kudzu wrote on Fri, 11 May 2012 15:35 |
Well, got the genny running by gravity feeding gas (had to literally
fill the hose with gas before it would fire and then it would just
consume the gas in the hose and then die). I also gave the fuel pump a
good wack. I don't know if that helped but it felt good. Starts right
up, we'll see if it does so in the morning too. ...
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Just a thought...
Why did smacking the fuel pump help?
A normal problem with these pumps is lack of use. The fuel in the pump evaporates and leaves a film (varnish) on all the parts. The internal parts are a metal slug (aka Piston) and a check valve. They could be gummed up fairly good with varnish. Smacking it will loosen the parts and allow them to work. But unless you use it very often (running solvent (fuel) through it), it will gum back up rather quickly.
SO... To make it reliable, clean it or use it!
It is fairly easy to clean.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] Onan Not Starting - UPDATE... [message #169304 is a reply to message #169299] |
Fri, 11 May 2012 20:06 |
Kudzu
Messages: 377
Registered: November 2011
Location: Marshville, NC
Karma: 0
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This is a new fuel pump, so I didn't think lack of use would have been
an issue. It had started easily before, then didn't due to low fuel in
the tanks. I added gas and it started. Then it didn't. Added even more
gas, still wouldn't start. Now it does. This is over a span of 4-6
months. I did add Seafoam to the gas today and hopefully that will help
clean it out.
Dan in NC
Caregiver to a 1976 Eleganza II
"Tzetze Fly"
On 5/11/2012 8:52 PM, Mike Miller wrote:
> Just a thought... Why did smacking the fuel pump help? A normal
> problem with these pumps is lack of use. The fuel in the pump
> evaporates and leaves a film (varnish) on all the parts. The internal
> parts are a metal slug (aka Piston) and a check valve. They could be
> gummed up fairly good with varnish. Smacking it will loosen the parts
> and allow them to work. But unless you use it very often (running
> solvent (fuel) through it), it will gum back up rather quickly. SO...
> To make it reliable, clean it or use it! It is fairly easy to clean.
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1976 Eleganza II
1996 Chevy Impala SS
1999 Kawasaki Vulcan Nomad
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| Re: [GMCnet] Onan Not Starting - UPDATE... [message #169307 is a reply to message #169304] |
Fri, 11 May 2012 20:33 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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[quote title=Kudzu wrote on Fri, 11 May 2012 21:06]This is a new fuel pump, so I didn't think lack of use would have been
an issue. It had started easily before, then didn't due to low fuel in
the tanks. I added gas and it started. Then it didn't. Added even more
gas, still wouldn't start. Now it does. This is over a span of 4-6
months. I did add Seafoam to the gas today and hopefully that will help
clean it out.
Dan in NC
Caregiver to a 1976 Eleganza II
"Tzetze Fly"
Maybe an inline 1/4" filter before the pump filter. Works for me. I also just had to replace fuel lines that I replaced 3 years ago. The main line frome the switching valve forward sprang pin hole leaks and looked like a soaker hose.
C. Boyd
76 Crestmont
East Tennessee
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Also wd-40 is a good starting fluid and not as volitle as either. As Bob said check to see if it is plugged in to the coach, also there should be a switch or reset button, or fuse in or on the box on top for AC output.