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  #1  
Old 08-05-2012, 12:48 PM
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cdlong cdlong is offline
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Default What happened to my engine?

I was mowing this morning when the engine started rocking & knocking. It will run with the throttle wide open only, but doesn' sound good, still rocking and knocking. I can engage the PTO and put her in gear. The deck turns and the tractor will move, but the engine is still rocking and knocking. I removed the air filter and have small dropplets of gas coming out the carb. I managed to drive her home, rocking and knocking stayed the same, didn't get any worse.
Any ideas what's going on here?

Just checked the carb. Both screws are still in the choke and throttle shafts.

Tractor has set 5 hours. Just started it. Throttle response is normal up to 1/2 throttle. Above 1/2 throttle, the knock comes back and is the worse @ WOT.
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Papaw
1984 CCC 582 w/ creeper, 42" blade, 44C deck, 220# wheel weights, 2 link chains & adjusters, Spring assist lift.
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  #2  
Old 08-05-2012, 01:25 PM
Methos Methos is offline
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Papaw, have you rechecked the oil level? Fuel getting to the carb? How's the spark looking?
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  #3  
Old 08-05-2012, 01:27 PM
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If it were mine I would not try to run it till the problem is found. If it is something inside the engine you could kill an only sick engine.
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With my son, EricR Super 2084 with 54" mower, 451 blower. 2086 with 3 pt hitch, 54 inch deck, 551 blower, 54 in brinly blade. A 4 digit original w deck. A 70 with deck. 2 102s both with 42 in decks, one with creeper, 1 36 inch IH snow thrower CW36, 1 42 inch IH blade. 149 with mower. 2072 w 3 pt hitch, Johnny bucket, 60 in mower, 451 blower. Jacobson GT 10 with mower. DR Lawn vac tow behind,Home made lawn roller. Brinly cart, 2 off brand carts and 1 home made cart.
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  #4  
Old 08-05-2012, 02:56 PM
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drglinski drglinski is offline
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Yup, it sounds like you are fixin' to blow it up. I'd likely either 1) run it till it blows or 2) take it apart now and see if the damage is minimal. It all depends on the size of your checkbook.
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(May 1970) 147 w/an IH spring assist, 48" deck, 42" blade, 1969 73, #2 trailer, 10" Brinly plow and (on loan) Dad's #2 tiller.
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  #5  
Old 08-05-2012, 04:24 PM
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Check the condenser.
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Proud to be a FFA member Westmoreland,TN Chapter
1978 Cub cadet 1450 IH Hubcaps
1975 1650SGT Work In Progress
1974 cub cadet 129 with sleeve hitch/spring assist
1974 108 (Mint) #510358
brinly 12 in plow,disc,8 in plow ,2 42, 2 44A ,50A DECKS
#40 boxblade,can`t keep up with the rest lol
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  #6  
Old 08-07-2012, 04:46 AM
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cdlong cdlong is offline
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I have a video of the engine running. If you think you can help figure out the problem, e mail me and I'll send the video.
Thanks
cdlongjr@msn.com
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Papaw
1984 CCC 582 w/ creeper, 42" blade, 44C deck, 220# wheel weights, 2 link chains & adjusters, Spring assist lift.
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  #7  
Old 08-07-2012, 08:17 PM
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cdlong cdlong is offline
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Engine is out, oil pan off. No internal damage that I can see. While pulling the engine, I found that the point wire, wire terminal had seperated at the eye portion. I can only assume that it was making contact at low rpmks and vibrating, losing contact and regaining contact, @ hi rpms. Note the piston about 7 o'clock. Seemds to be worn down. The head gasket was also blown. Shook the ciol bracket and air cleaner base so hard they both cracked.
Attached Images
File Type: jpg Block deck.jpg (27.0 KB, 148 views)
File Type: jpg Blown head gasket.jpg (32.5 KB, 149 views)
File Type: jpg Broken coil holder.jpg (31.6 KB, 149 views)
File Type: jpg Carboned head.jpg (33.3 KB, 147 views)
File Type: jpg Piston bad 1.jpg (28.1 KB, 148 views)
File Type: jpg Piston bad 2.jpg (34.6 KB, 148 views)
File Type: jpg Point wire (1).jpg (30.4 KB, 148 views)
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Papaw
1984 CCC 582 w/ creeper, 42" blade, 44C deck, 220# wheel weights, 2 link chains & adjusters, Spring assist lift.
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  #8  
Old 08-07-2012, 10:32 PM
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Tim.E Tim.E is offline
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I had the same thing happen on my 1450.It rocked and knocked and then just quit.I actually thought it blew up.Took the head off,nothing wrong there,took the oil pan off,nothing wrong there.After much head-scratching,I found that the wire attaching to the points had broken off at the terminal where it attaches to the points.I fixed that,de-carboned the head,piston and valves,put it back together with new gaskets,and much to my satisfaction,it ran great!What a relief!!!!
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  #9  
Old 08-08-2012, 03:53 AM
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cdlong cdlong is offline
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I'm hoping to do the same thing, but the piston worries me.
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Papaw
1984 CCC 582 w/ creeper, 42" blade, 44C deck, 220# wheel weights, 2 link chains & adjusters, Spring assist lift.
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  #10  
Old 08-08-2012, 04:48 PM
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cdlong cdlong is offline
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Got the deck, head, piston and valves cleaned up. I figure on replacing the piston and rod, all iginition components, rebuilding the carb & lapping the valves.
Thoughts?
Attached Images
File Type: jpg Clean deck.jpg (28.1 KB, 93 views)
File Type: jpg Clean head.jpg (36.4 KB, 94 views)
File Type: jpg exhaust seat.jpg (24.2 KB, 92 views)
File Type: jpg Intake seat.jpg (25.8 KB, 93 views)
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Papaw
1984 CCC 582 w/ creeper, 42" blade, 44C deck, 220# wheel weights, 2 link chains & adjusters, Spring assist lift.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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