ONAN frequency adjust

[edgar kremer]

To adjust the frequency (speed) of the Onan you need a 120v ac/dc neon
test light .. available at Home Depot, Lowes, etc. Be sure to obtain a
120v light, some are rated for lower voltages.

A simple setup is to power the coach from the Onan & have an extension
cord plugged into a commercial power outlet.
Put one probe from the test light into one of the Onan outlet slots (NOT
the round ground pin). Put the other probe into one of the commercial
power outlet slots. If the light glows continuously, remove one of the
probes & place it into the adjoining slot of the Onan or commercial
outlet. Do NOT switch both probes. The light should pulsate when
properly hooked up.

When the Onan frequency (speed) approaches 60 hz, the pulsation will
slow until the Onan freq is exactly 60 hz at which time the light will
extinguish. That is not likely to happen, as the Onan cannot maintain
exactly 60 hz. Therefore, aim for the slowest pulsation. With my Onan,
and I assume most, 60 hz produces exactly 120v. Obviously, the higher
the freq the higher the voltage, and vice versa.

- --
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GMC Schematics
http://meltingpot.fortunecity.com/greenside/321/

GMC Calling Card Sample
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ENTER Password: mistifawn
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[edgar kremer]

To adjust the frequency (speed) of the Onan you need a 120v ac/dc neon
test light .. available at Home Depot, Lowes, etc. Be sure to obtain a
120v light, some are rated for lower voltages.

A simple setup is to power the coach from the Onan & have an extension
cord plugged into a commercial power outlet.
Put one probe from the test light into one of the Onan outlet slots (NOT

the round ground pin). Put the other probe into one of the commercial
power outlet slots. If the light glows continuously, remove one of the
probes & place it into the adjoining slot of the Onan or commercial
outlet. Do NOT switch both probes. The light should pulsate when
properly hooked up.

When the Onan frequency (speed) approaches 60 hz, the pulsation will
slow until the Onan freq is exactly 60 hz at which time the light will
extinguish. That is not likely to happen, as the Onan cannot maintain
exactly 60 hz. Therefore, aim for the slowest pulsation. With my Onan,
and I assume most, 60 hz produces exactly 120v. Obviously, the higher
the freq the higher the voltage, and vice versa.

- --
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
GMC Schematics
http://meltingpot.fortunecity.com/greenside/321/

GMC Calling Card Sample
http://home1.photoisland.com/servlet/com.arcsoft.LoginNew?com=arcsoftBanner&awp=index4.html&DIRECT=show&USERNAME=mistifawn&WHO=guest

ENTER Password: mistifawn
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

 

[gene]

This is sooooooo cleaver that I am going to try it asap....

also going to put it up on the solid state ignition information. I hope
you thought of this---- it is great

gene

>To adjust the frequency (speed) of the Onan you need a 120v ac/dc neon
>test light .. available at Home Depot, Lowes, etc. Be sure to obtain a
>120v light, some are rated for lower voltages.
>
>A simple setup is to power the coach from the Onan & have an extension
>cord plugged into a commercial power outlet.
>Put one probe from the test light into one of the Onan outlet slots (NOT
>the round ground pin). Put the other probe into one of the commercial
>power outlet slots. If the light glows continuously, remove one of the
>probes & place it into the adjoining slot of the Onan or commercial
>outlet. Do NOT switch both probes. The light should pulsate when
>properly hooked up.
>
>When the Onan frequency (speed) approaches 60 hz, the pulsation will
>slow until the Onan freq is exactly 60 hz at which time the light will
>extinguish. That is not likely to happen, as the Onan cannot maintain
>exactly 60 hz. Therefore, aim for the slowest pulsation. With my Onan,
>and I assume most, 60 hz produces exactly 120v. Obviously, the higher
>the freq the higher the voltage, and vice versa.
>
>--
>&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
>GMC Schematics
>http://meltingpot.fortunecity.com/greenside/321/
>
>GMC Calling Card Sample
>http://home1.photoisland.com/servlet/com.arcsoft.LoginNew?com=arcsoftBanner
&awp=index4.html&DIRECT=show&USERNAME=mistifawn&WHO=guest
>
>ENTER Password: mistifawn
>&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
>
>
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/

 

[gene]

He is

Edgar Kremer

you can find him in my Hotlinks page listed under personal web pages and
schematics.

gene

>

>
>
>also going to put it up on the solid state ignition information. I hope
>you thought of this---- it is great
>
>gene >>
>
>I also thought that it was a great method. That's why I asked Wayne to give
>us all a bit more detail on it. I have also found in the Maintenance Manual
>a Voltage Chart and a Speed Chart for our Onans. The voltage chart says max
>no-load voltage at 126 and it shows min.full-load voltage at 110.
>
>The Speed Chart shows maximum no-load speed 1890 rpm with a resulting
>frequency of 63 hertz. It shows minimum full-load speed at 1770 which is 59
>hertz.
>
>Emery Stora
>77 Kingsley
>Santa Fe, NM
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/