Onan Gold Marquis 5500 spark plug gap

[John Stephens]

I'm tuning up my generator in my 2005 Adventurer 38J and can't find what the spark plug gap should be set at. I've looked at the owner's manual, the generator cover, and all the decals around the generator, and I can't find the gap information anywhere. Can anyone who has tuned up one of these generators tell me what the gap is supposed to be?

Thanks in advance.

 

[IBTripping]

The spark plug gap on an Onan Gold Marquis 5500 generator is 0.025 to 0.030. I did an internet search and found this gap on several websites.
The following website had more information than anyone could want, but had to scroll down a long way to get the info: Onan 5500 Marquis Gold Generator Spark Plug - Generator Hacks

 

[OldWEB]

I'm tuning up my generator in my 2005 Adventurer 38J and can't find what the spark plug gap should be set at. I've looked at the owner's manual, the generator cover, and all the decals around the generator, and I can't find the gap information anywhere. Can anyone who has tuned up one of these generators tell me what the gap is supposed to be?

Thanks in advance.

Same.
Lots of references to 0.025" gap online...
You never gave the SPEC of the generator, so had to guess.

https://www.cummins.com/sites/default/files/rv-manuals/A035D005.pdf

Pg. 10 in case you can't find it.

 

[DonTom]

Is it a Champion Spark Plug?

-Don- Reno, NV

 

[John Stephens]

Thanks for the responses, guys. I have set the gap at .025" and comparing them to the ones being taken out, they appear about right, given the wear on the old plugs.