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#1
05-19-2012, 12:34 PM
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Bad 982 day
The last time I had my 982 running was August of 2010 and it was surging quite a bit. I tried to get it running last June but realized that the starter was bad. So over this past winter I finally pulled the engine and replaced the starter and while I was at it, I went ahead and pulled the carb and intake off to clean it. It seem clean so I put it back together. Last week I decided to pull the petcock out of the tank and replace it and the bushing. It was clogged up which would account for the surging. I got all that done and put some gas in it yesterday and finally got it running. It was running the best I had ever seem it until a big nasty knock developed while running it at full throttle. I shut it down as fast as I could but the damage had been done. I pulled the heads and found what looked like pieces of a lock washer in one of the cylinders. I guess it fell in when i had the intake off. luckily, the cylinder bore is ok. It just mangled the top of the piston and the head. I found some heads on E-bay but the piston is going to be fun to find. I can't seem to find any for sale anywhere. Yeah Rah!!!! All this after I had issues with the engine I just put in the 782 and was contemplating selling all my cub cadet stuff in one huge lot. It seems it never ends!
AJ
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1980 [COLOR="Red"][/COLOR]482- Stock 1981 [COLOR="Red"][/COLOR]582- Mag18, Sleeve Hitch, Spring assist 1979 [COLOR="Red"][/COLOR]682- Mag18, Sleeve Hitch, Spring Assist, #1 Tiller 1980 [COLOR="Red"][/COLOR]782- Mag18, Sleeve Hitch 1983 [COLOR="Red"][/COLOR]982- Stock, Fully Optioned 
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#2
05-19-2012, 01:08 PM
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Did it put a hole in the piston head or is it something you can smooth out without a complete tear down??? Same for the heads...
Pics will do wonders on coming up with a solution...
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#3
05-19-2012, 03:17 PM
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No hole in the piston but the gouges are probably a good 1/8" deep. It could be smoothed out but i'm afraid of it burning a hole through the top of the piston where it is thinner.
Good thing is that these onans aren't built like the kohlers. I can drop the oil pan and remove the piston and rod from there. AJ
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1980 [COLOR="Red"][/COLOR]482- Stock 1981 [COLOR="Red"][/COLOR]582- Mag18, Sleeve Hitch, Spring assist 1979 [COLOR="Red"][/COLOR]682- Mag18, Sleeve Hitch, Spring Assist, #1 Tiller 1980 [COLOR="Red"][/COLOR]782- Mag18, Sleeve Hitch 1983 [COLOR="Red"][/COLOR]982- Stock, Fully Optioned
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#4
05-19-2012, 03:35 PM
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I'd pull that one and if you can get a new one all good but if you can't as long as it isn't holed, cracked or have a crushed ring groove I'd smooth it up, put it back in and run it. I've seen a lot worse than that run just fine.
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL
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#5
05-19-2012, 08:58 PM
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This ain't no hobby....it's an addiction
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#8
07-21-2012, 05:17 PM
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Well the tractor is back up and running. I'm currently between jobs, so I've had some free time to work on it. I was hoping I could salvage the old piston but the ring grooves were crushed. I got lucky and found a piston with the correct casting number on ebay for $30. Had to buy rings for $25, and new head gaskets for $32, and I'm now back up and running. I let it run for 15 minutes and now I'm waiting for it to cool down so I can retorque the head bolts. After that it's all putting all the engine tins back on. That should be fun to do with the engine in. I took them off with the engine in. Now I hope I can get them back on with it in.
AJ
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1980 [COLOR="Red"][/COLOR]482- Stock 1981 [COLOR="Red"][/COLOR]582- Mag18, Sleeve Hitch, Spring assist 1979 [COLOR="Red"][/COLOR]682- Mag18, Sleeve Hitch, Spring Assist, #1 Tiller 1980 [COLOR="Red"][/COLOR]782- Mag18, Sleeve Hitch 1983 [COLOR="Red"][/COLOR]982- Stock, Fully Optioned
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#9
07-21-2012, 05:52 PM
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Glad ya got it back up and running...Also...With the Onans it seems the split intakes have a tendency to leak and cause surging...just an fyi...
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