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Generac Generators (SEARS, etc.)

Generac 15 KW coil Replacement


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  #1  
Old 01-09-2019, 02:53:10 PM
NH Sparky NH Sparky is offline
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Default Generac 15 KW coil Replacement

Hello, I have a customer with a Generac 15 KW standby generator, Model # 0043903. S/N 4214749
The spark plug wire has suffered rodent damage where it exits the flywheel cover on it's way to the spark plug on the operators side of the generator. There are two different part numbers for the 2 coils based on cylinder number. I don't know which of the 2 cylinders is #1, so I don't know which coil to order. According the the parts list, cyl. 1 coil P/N is 0C3052 and cyl. 2 coil p/n is 0E7743.
Any insight as to which cylinder is #1 would be much appreciated.

Thanks
Dave
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Old 01-09-2019, 06:06:45 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Generac 15 KW coil replacement

Quote:
Originally Posted by NH Sparky View Post
Hello, I have a customer with a Generac 15 KW standby generator, Model # 0043903. S/N 4214749
The spark plug wire has suffered rodent damage where it exits the flywheel cover on it's way to the spark plug on the operators side of the generator. There are two different part numbers for the 2 coils based on cylinder number. I don't know which of the 2 cylinders is #1, so I don't know which coil to order. According the the parts list, cyl. 1 coil P/N is 0C3052 and cyl. 2 coil p/n is 0E7743.
Any insight as to which cylinder is #1 would be much appreciated.

Thanks
Dave
Cylinder #1 is the one on the starter motor side. so this one would be furthest away from you if you are looking at the machine with the lid open. Basically its the harder one to get to. If you look at the flywheel straight at, its the one to the right of it.
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Old 01-11-2019, 02:24:07 PM
Gentek Gentek is offline
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Default Re: Generac 15 KW coil replacement

Be aware though that the ignition coils should ALWAYS be replaced in pairs as well as the old ground wire with the diodes in it. The new coils have integrated diodes and won't work correctly otherwise. If you need more info, PM me here and I would be happy to help!
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Old 01-16-2019, 09:54:32 AM
NH Sparky NH Sparky is offline
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Default Re: Generac 15 KW coil replacement

Thanks for the response and info. As per Gentek's advice, I'll replace both coils. I am definitely going to wait until spring when its warmer though!
I was able to pull what little slack there was in the plug wire out far enough to stop it from shorting out, but it's a poor fix at best.
I tried to attach a photo but couldn't figure out how.
Thanks again
Dave
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Old 01-16-2019, 03:15:28 PM
Bassplayer1985 Bassplayer1985 is offline
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Default Re: Generac 15 KW coil replacement

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Originally Posted by NH Sparky View Post
Thanks for the response and info. As per Gentek's advice, I'll replace both coils. I am definitely going to wait until spring when its warmer though!
I was able to pull what little slack there was in the plug wire out far enough to stop it from shorting out, but it's a poor fix at best.
I tried to attach a photo but couldn't figure out how.
Thanks again
Dave
Wrap some electrical tape if you are waiting till the spring so it lessens that chance.
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Old 05-28-2019, 08:38:31 AM
restore49 restore49 is offline
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Default Re: Generac 15 KW coil replacement

The cap can be removed from the end of the plug wire and heat shrink tubing can be slipped over the wire for a fix. May not be factory but the new heat shrink with the sealing glue interior will do the job.
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  #7  
Old 05-31-2019, 05:26:31 PM
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Motorhead Motorhead is offline
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Default Re: Generac 15 KW coil replacement

I totally agree with restore49 as a way to repair the plug wire. I have used clear silicone glue over the damaged area, slid the shrink tube over after the silicone had set up a little while then shrink it. I will often put two layers of shrink tube, one over the first.
THEN.... Store the set where the darn Mice can't get to it or destroy the mice.
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