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616 Running hot
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Tom6070 View Drop Down
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Joined: 11 Sep 2009
Location: Kendallville IN
Points: 52 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom6070 Quote  Post ReplyReply Direct Link To This Post Topic: 616 Running hot
    Posted: 29 Apr 2014 at 9:27pm
Hey Guys,
My 616 has a good running original Onan engine. It seems to be running a little hot. Backfires when shutting it off. Anybody have any ideas?
I plan on replacing the engine in a few years. Thanks, Tom
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10576 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2014 at 9:40pm
Carbon buildup on the heads probably.Might have timing off slightly and cooling fins clogged up. HTH Tracy
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Toscani NE SD View Drop Down
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Joined: 21 Jan 2011
Location: Milbank S.D.
Points: 369 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Toscani NE SD Quote  Post ReplyReply Direct Link To This Post Posted: 30 Apr 2014 at 6:36pm
mines done it since I bought it in 2000,i'm thinking carbon to but still have never had head off,maybe this year
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D-17_Dave View Drop Down
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Joined: 11 Sep 2009
Location: Mocksville NC
Points: 990 		Post Options Post Options   Thanks (0) Thanks(0)   Quote D-17_Dave Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2014 at 12:10am
Back firing isn't really a running hot issue. Any little flake of carbon or oil residue buildup can cause this. A lean carb will mare it pop and backfire while lowering throttle or at shutdown. Btw, a lean carb will also make it run above normal temp.
Yea, I can fix that.....
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