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AC 620 front timing marks?
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10624 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Topic: AC 620 front timing marks?
    Posted: 20 May 2017 at 6:34pm
I have a 616 that has a 620 engine in it. On the front of engine, there is a indicator that has a mark to set to mark on front clutch. The Simplicity manual shows these on the 4041 .It doesn't clarify where to align the marks up at timing. I know it should be 20 degrees before TDC using rear engine marks. I don' want to use them because of all the stuff you have to remove. Any help appreciated. Thanks tracy
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HudCo View Drop Down
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3539 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2017 at 9:13pm
dont you time that there the timing hole on the blower houseing
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coggonobrien View Drop Down
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Joined: 14 Nov 2010
Location: Eastern Iowa
Points: 1820 		Post Options Post Options   Thanks (0) Thanks(0)   Quote coggonobrien Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2017 at 8:24am
Tracy, I just timed mine by ear.  starts right now and seems to be fuel efficient.
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10624 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2017 at 8:41am
There is a set of marks on the front of the 19.5 Onan. I got the info to align the marks from the Simplicity guys on facebook. Mine seems to have valve chatter in a hard pull uphill. Not sure if it is timing or valves need adjusting.  Tracy
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