RPM Sensor Loss - Model 0056100

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kdizz781
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Hello,

I purchased my house 2 years ago, already has the generator installed
  • Generac 8KW
  • Model: 0056100
  • Serial : 5627100
It has been working fine, until about a month ago, when I noticed the "RPM Sensor Loss" light was illuminated. I changed the battery, just in case because I've never done that (Oil/filter, air filter, and spark plug maintenance was all done in the past), still nothing.

When I flip the switch to manual, it clicks, pause for about 2 seconds, and clicks again, then the "rpm sensor loss" light illuminates.

From my research looks like the ignition magneto (coil) could need to be replaced. Looks to be part# 0G9241T

Just looking for some guidance to see if I am on the right track. I am pretty handy, is this a relatively simple DIY?

From the looks, it is 2 bolts, and position the coil pack about a business card away from the magnet.

Thanks ahead of time!

Kevin
Chris
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From your description I don't think that the coil is the trouble here. It sounds more like a bad starter, bad starter contactor, or bad battery. I would start with the battery and have it tested at a local auto parts store to make sure it's still good. The starter contactor can be jumped with a large screwdriver to see if the starter will spin.

The 8kW starter contactor can be found here: https://shop.gentekpower.com/products/g ... air-cooled
The starter is here: https://shop.gentekpower.com/products/g ... oled-units
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"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
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kdizz781
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Chris wrote:
Tue Jan 14, 2020 3:01 pm
From your description I don't think that the coil is the trouble here. It sounds more like a bad starter, bad starter contactor, or bad battery. I would start with the battery and have it tested at a local auto parts store to make sure it's still good. The starter contactor can be jumped with a large screwdriver to see if the starter will spin.

The 8kW starter contactor can be found here: https://shop.gentekpower.com/products/g ... air-cooled
The starter is here: https://shop.gentekpower.com/products/g ... oled-units
Chris, Thank you so much for the reply and guidance...

Maybe this is too much to ask for, but are you (or anyone else) able to steer me in the right direction on how to to jump the starter contactor to test if the start will spin?

I will be ordering any needed parts from you once I get a better idea of what is going on.

Thanks!
tbonini
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If you look at the starter contactor, you will see the two heavy terminals. One side is the battery and the other goes to the starter. All you need to do is use a heavy piece of metal to connect those two terminals together. On the Fords of the past, we just used a heavy screwdriver to short the two terminals but many of the newer contactors have a plastic shield to prevent that from happening and on those, I just use a clean pair of channel lock pliers because you can adjust their jaws to span the gap. Just close the jaws across the two screw terminals on the top and if the starter and battery are good, the engine should crank. Make sure that the terminals and the lugs are clean on the contactor as well as the battery.
kdizz781
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Just wanted to thank you all for the help.

I ended up ordering a starter and contactor, replaced both and it started up first try! As you can see in the pictures the starter was shot.

Thanks again!
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Chris
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Glad to see you got it working!! :cool:
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools! https://www.amazon.com/shop/gentek_power
aub650
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Did you have to remove the back panel of the unit in order to remove the Starter Contactor? It does not looks like the Starter Contactor is easily accessible from the top. Thanks.

-Alex
Chris
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Starter contactor is very easily accessible on these units? You can see it in the images on the firewall.
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools! https://www.amazon.com/shop/gentek_power
aub650
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I have a 20kw air cooled Generac with v-twins engine. I can barely see the starter contactor buried in the back of the unit.
Chris
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Those typically get replaced with the starter motor as a whole part. Not a bad job, just has to be done blind...
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools! https://www.amazon.com/shop/gentek_power
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