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Old 02-18-2010, 08:22 PM
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cub149 cub149 is offline
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Join Date: Jun 2009
Location: NC
Posts: 636
Default setting timing on Onan B48G

I have searched and searched and can't find any info on setting the timing on the Onan B48G engine. I looked at the service manual but all it tells as far as timing goes is the setting. I can't find any markings on the flywheel. Where are the markings? I do see two long lines with hash marks in the middle on the casing, are these the marks to set the flywheel marks to? Also, which line do I use? The manual says 21 degrees, which line would that be? I have included a picture of the marks in question. Am I in the right place to begin with?
Which wire is considered the no. 1 wire? I was thinking the longest on, the wire to the plug on the left side.

And yes I know the engine is nasty, that is next on the list. I put new points in and I am still getting a rapid backfire at times during driving but not at idle. It's not like a big loud backfire but almost a machine gun type backfiring and as far as I can tell it is coming from the exhaust.

Thanks for any help
Chip
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