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Old 11-18-2012, 05:35 PM   #1
daveandviv's Avatar
Join Date: May 2012
Location: Las Vegas, Nevada
Posts: 36
Onan Generator

Have a 5.5 Onan Marquie generator on a W-24 chassis. Doing a tune up and having problems trying to figure out how to change the two spark plug...let alone get to them. Any help will be appreciated.

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Old 11-18-2012, 06:15 PM   #2
Join Date: May 2011
Location: Fort Erie ON CA
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Need more info such as: make year model of your coach, also hours on the genny. Do a search on this site, there is a ton of info available.

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Old 11-18-2012, 06:24 PM   #3
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Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 4,732
Any particular reason you want to change the plugs?

Mine is 7 years old with about 400 hours and runs great. I wouldn't change the plugs unless there was a problem.
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
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Old 11-18-2012, 06:32 PM   #4
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Location: FL
Posts: 1,124
Since the engine is all aluminum... make sure you spray some penetrant on the plugs and put some dielectric grease in the boots/anti seize on the plug threads when installing new ones.

Like Arch said... your plugs should be good for awhile. Id change the oil/filter and peek at the air filter. You can get the filter info off the side of teh unit and take those #s to napa.
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generator, onan

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