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Home » Public Forums » GMCnet » [GMCnet] I give up. (Onan)
Re: [GMCnet] I give up. (Onan) [message #187966 is a reply to message #187964] Mon, 22 October 2012 10:36 Go to previous messageGo to previous message
k2gkk is currently offline  k2gkk   United States
Messages: 4452
Registered: November 2009
Karma:
Senior Member

What are you trying to run/start with the 50A supply?

I don't believe that there is any way the starter for the
Onan should draw that much current! A motorcycle
battery for a Harley or other large bike should easily
spin the starter for the Onan.

Ken Burton's estimate for current draw for the Onan fuel
pump is likely to be pessimistic!

I think you are making unnecessary work for yourself
until you get the fuel pump straightened out.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
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> Date: Mon, 22 Oct 2012 08:22:34 -0700
> From: jhbridges@ymail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] I give up. (Onan)
>
> A 50 amp supply won't make it. My little set pins a 60 amp ammeter.
>
> --johnny
> 76 23' transmode norris
> '76 palm beach
>
> From: Ken Burton <n9cv@comcast.net>
> To: gmclist@temp.gmcnet.org
> Sent: Sunday, October 21, 2012 11:29 PM
> Subject: Re: [GMCnet] I give up. (Onan)
>
>
>
> Robin,
>
> Your immediate problem is that the Onan electric fuel pump is not pumping.
>
> Disconnect the electrical connection to the pump. Connect the pump directly to a 12 volt source capable of at least 5 or 6 amps. It should start clicking and continue doing so until it builds up pressure. If it does not do this, remove the pump (2 lines and 2 mounting bolts) and work on it stand alone on the work bench. As Ken H. stated, it probably is stuck on the contacts inside of it are not making connection. You can fix it.
>
> On your low voltage when cranking. You stated that you have a 50 amp power supply. I think that the starter draws more that 50 amps exceeding the capacity of your supply so the voltage is dropping when cranking. I would wait to work on this until after you get the electric fuel pump working.
>
> If you want some help on Skype call me. I'm n9cv-11 on skype. My home phone number is listed on the black list.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana

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