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12 hp kohler backfire on shutdown

IHC Cub Cadet Forum -- Questions and answers to all of your Cadet related issues.
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'Country' Elliott
Cub Pro
Cub Pro
Posts: 2575
Joined: Mon Feb 03, 2003 5:25 am
Zip Code: 37774
Tractors Owned: 1948 McCormick-Deering Farmall Cub
152 Disc Plow & Flat Belt Pulley
Brinly #8 Moldboard Plow
1971 JD 112 Garden Tractor
1928 Economy Hit & Miss Engine
1927 David Bradley "Little Wonder" Feed Grinder
1 A.H. Patch Corn Shellers
1 A.H. Patch #1 Grist Mill
Circle of Safety: Y
Location: TN, Loudon (near Knoxville)

Postby 'Country' Elliott » Thu Jul 28, 2005 8:33 am

If your engine's out of correct timing :shock: ...you'd probably be aware of the rough running and poor power under a load :cry: .
"Save The Possums...Collect The Whole Set"
"Tennessee Sun-Dried Possum...Heaven In A Can"

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k. hansen'49cub
10+ Years
10+ Years
Posts: 39
Joined: Sun Sep 21, 2003 8:02 pm
Location: New Jersey

Postby k. hansen'49cub » Thu Jul 28, 2005 8:14 pm

I'm going to try another carb,before I install it, I'll break it down and check the internal's ,and throttle shaft to see if it's worn, I will try adjusting the carb one more time before I remove it,perhaps the rebuilder messed with it,I remember when I got it back it was sorta dark out,I was running it and I saw a slight glow in the exhaust while running ,mabee I made it too ritch causing unburnt fuel to ignite in the hot exhaust ,does that sound possible?.....Dawgonnittt...Give me my laptop,and a Detroit Series 60 any day :lol: :lol: :lol: :lol:
Keith

'39JD B
'49 cub
'52 8n
'53 Golden Jubilee
And a whole bunch of Cub Cadets.....

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beaconlight
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10+ Years
Posts: 7703
Joined: Thu Aug 19, 2004 2:31 pm
Zip Code: 10314
Location: NY Staten Island & Franklin

Postby beaconlight » Thu Jul 28, 2005 8:21 pm

Yep Rich could do it.

Bill
Bill

"Life's tough.It's even tougher if you're stupid."
- John Wayne

" We hang petty thieves and appoint the great ones to public office."
- Aesop

Dave (69 lo-boy)
10+ Years
10+ Years
Posts: 377
Joined: Tue Sep 30, 2003 7:52 pm
Zip Code: 23047
Location: Doswell, Virginia
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Postby Dave (69 lo-boy) » Thu Jul 28, 2005 8:34 pm

k. hansen'49cub wrote:I'm going to try another carb,before I install it, I'll break it down and check the internal's ,and throttle shaft to see if it's worn, I will try adjusting the carb one more time before I remove it,perhaps the rebuilder messed with it,I remember when I got it back it was sorta dark out,I was running it and I saw a slight glow in the exhaust while running ,mabee I made it too ritch causing unburnt fuel to ignite in the hot exhaust ,does that sound possible?.....Dawgonnittt...Give me my laptop,and a Detroit Series 60 any day :lol: :lol: :lol: :lol:

Just guessing, but if it is running lean enough to make the exhaust glow it sounds like a probable cause for the "pop" in the exhaust, that is why I was asking about carbon buildup, it makes a hot spot and any unignited fuel coming in contact with it will burn.
For sure the problem is a hot spot somewhere....

Paul B
10+ Years
10+ Years
Posts: 2338
Joined: Sat Apr 10, 2004 6:12 pm
Zip Code: 40218
Circle of Safety: Y
Location: KY, Louisville

Postby Paul B » Thu Jul 28, 2005 10:44 pm

If the exhaust is glowing, it is probably too lean, rather than too rich..

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k. hansen'49cub
10+ Years
10+ Years
Posts: 39
Joined: Sun Sep 21, 2003 8:02 pm
Location: New Jersey

Postby k. hansen'49cub » Sat Jul 30, 2005 8:23 pm

I remember when I got it back it was sorta dark out,I was running it and I saw a slight glow in the exhaust while running ,mabee I made it too ritch causing unburnt fuel to
I adjusted it richer after I saw the glow ,I did'nt get to mess with it today, I have this week off from work,I'll be spending it at home ,in the garage, the 125's on my punch list.I really hope this can be worked out , I love my 70 ,but this hydro with the "48 deck is right between my Cub,and the 70, Since my wife found the hydro ,I pretty much retired my 70 as the trim mower, but since this latest problem, I've been using the restored 70 instead,You guy's are alot of help.Thank You.
Keith



'39JD B

'49 cub

'52 8n

'53 Golden Jubilee

And a whole bunch of Cub Cadets.....

S.H.A.F.T.
10+ Years
10+ Years
Posts: 156
Joined: Sun Mar 02, 2003 6:41 pm
Location: Millersville, PA

Postby S.H.A.F.T. » Tue Aug 02, 2005 10:11 pm

For what it is worth, my 301 that I just rebuilt this past spring popped before I rebuilt it and it still pops. If I let her cool off it makes a smaller pop. I too can just about shut it off and start to climb off before she goes.

S.H.A.F.T.
"Son, you can do it right, or you can do it again."


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