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982 trouble

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tjkrauss

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May 19, 2018
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terry j krauss
so i have a ih 982 with a 60in haben deck i mow with . it runs for about a hour then it shuts down . you let it sit till it cools down and it starts back up. i took the sides off .it did not help. it was doing it last year i took it to a shop and it was a wire in the ignition .replaced the wire it seemed to work fine . also i checked the spark with a inline spark testor didnt seem to be getting spark. funny thing so i have a 1650 i jump on and mow with till the 982 cools down! any sugestion would be apreciated
 

dschwandt

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Mar 31, 2012
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David Schwandt
Bad crimp connection somewhere in the ignition circuit,
Heat swells the insulation and pulls the wires apart, like shutting off the key
Check terminals at coil and points.
Get yer test light out and start wiggling things.

Don't laugh! Had this happen on my Chrysler a few years back, would just quit going down the road and then fire back up while I was coasting to a stop.
Talk about BACK-FIRE!!
Cost me 2 new mufflers!!!!

Main crimp in the distributor connecting to the coil had been crimped and was pinching the wires until the last strand finally broke.
 

dfrisk

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Nov 12, 2001
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Dennis Frisk
GARY - The Onan in a 982 uses a vacuum operated fuel pump that attaches half inside and half outside the cooling shroud on the flywheel side, or cold side of the engine. Can't remember exactly how the gas line routes to the carb, think it's rubber, but everything gets pretty hot, my 982 would boil the gas out of the float bowl of the carb every time I shut it off after mowing. Run it for 5-10 minutes and shut off and it would restart instantly. I'm really surprised as many engines as Onan built, they REALLY did a lot of stupid things in the design of their engines. They pull like a draft horse, burn a lot of gas, and repair parts are CRAZY expensive. I've spent hours and hours searching for a Duetz air cooled diesel engine I could transplant into my 982.
 

Oak

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Joined
Oct 26, 2019
Messages
54
Location
Georgia
Are you getting 12 volts on the + terminal of the coil? Loosen the connections on the coil and re tighten them, sometimes that will help. Also check the connections on the condenser too. Do you have the service manual for the B48G? Here is a link to the link for the free manual. Manual - Onan B48G - Only Cub Cadets It explains how to check the coil on page 3-9(page76).
 

Reddoug

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Joined
Jan 23, 2020
Messages
12
Location
Illinois
I had a 982 closed to 30 years and I never had any problems boiling gas, not saying it can't happen. Air comes in the rear of the engine and blows across fuel line behind shroud, do you have good air flow out the front? I would check coil and condenser. they can definitely cause they problem your describing. Wife moved me into a condo last year so I had to sell me tractors and manual went with 982 so I can't look up spec. Check it right after it dies and then when it cools off and see if there is a difference.
 

tjkrauss

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Joined
May 19, 2018
Messages
8
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terry j krauss
hey guys thanks for all your coments iam preety sure its not fuel . i probe it when it happened no spark. last year i had this problem i put a new factory coil on and that wasnt the problem ,i found out there was abad wire on the ignition so i took it to a cub dealer i made them change the whole socket and it fixed the problem. it ran great last fall . and good this spring . untill about three weeks ago. i checked the wire and it seems to be ok i dont want to believe the new coil is going bad . its a p22o replacement oan i dont know hardley anything about oans . i was hoping maybe the condensor . i have not checked it yet. i will keep you guys up dated thanks again
 

Oak

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Oct 26, 2019
Messages
54
Location
Georgia
The P series use a different ignition system then does the B48 engine. There is a crank sensor and magnet behind the flywheel. They do fail and cause issues like you describe once the engine warms up. It sounds like this may be your issue if that is the engine you have. The engine will need to be pulled and the flywheel removed if that is the issue you are having. You need the John Deere CTM2 manual, it covers both the B&P series engines in better detail then does the IH manual. Got any pics of your engine in the 9?


Here is a link to a good source for Onan parts but they will drain your wallet. 166-0785 New Ignition Module P-Series 166-0785 ignition module [166-0785] - $199.00 : Onan Parts.Com, Rebuild Parts for Onan engines
Gary's Place up in Hope, MI is another good source for Onan parts and so is "Boomer". Boomer was great to talk to when I was having issues putting a P series in one of my 9's.
 
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