>From the test bed. Only had to go through one diode and one fuse until we
read what the instructions called for. The following from Gene does work.
It allows the pump to prime the carb and then when you start the Generator
it runs right away.
Al (
mr.c) Chernoff
> -- [ From: Eugene Fisher *
EMC.Ver #2.5.3 ] --
>
> Pictures on the web page
>
> ONAN PRIMER SWITCH
> Jim Bounds provided an excellent article in the August 1998 issue of
> GMCMM. His suggestion was for a Onan primer switch to be added to the
> control panel of the Onan generator. His design has been "improved" by
> adding a diode so that the Onan voltage does not feed back into the 12
> volt source. For those of us that intend to keep the Onan this primer
> switch will stop the agonizing cranking of the Onan to feed gas to the
> carburetor.
> (Switch)
> The drawing in the article did not match my coach. I think this was
> because mine was a later model (77). I also do not like fuses hidden
> behind panels so I supplied the 12 volts for the circuit from the Porch
> Light switch which is already fused. We tested this concept on
Mr.C's
> coach by making a wiring error and blowing the fuse. It worked well.
> (Wiring)
> The pictures show the installation and connections for the 1977 model
> coach. The theory of operation is that when you push the prime switch
> 12 volts is applied to the runtime meter, the light in the start switch,
> and the Onan electric fuel pump. The result is that fuel is pumped up
> to the carburetor ( which is usually dry). Release the prime switch and
> start the Onan in the normal way. It starts much faster.
>
> The best way to find the correct connection on the Start/stop switch is
> to run the Onan and measure until you find the terminal with 12 volts on
> it with the Onan running. This is the terminal to attach to the diode.
> Note that the stripe on the diode is nearer to the Start/Stop switch.
> The 12 volt line from the other side of the push button switch I ran
> down to the bank of switches at the door which has a switch for the
> porch light. I tapped into the fused 12 volt line and attached the wire
> to the push button.
> (Power)
>
> SUPPLIES
> 2 amp push button
> big fat diode ( I will come up with a number from Radio Shack)
> 3 feet of wire
>
> Thanks to Mr.c for being the test bed.
> Gene
> --
> Gene 76Palm Beach /Or/CA
>
> GMC Technical Information
>
http://www.california.com/~eagle/
