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Case Tractors Discussion Forum

Case 448 Electrical Problem

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joe1966

08-24-2005 19:17:22

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I have a Case 448 lawn tractor with an 18 hp Onan engine. It was running fine when it just shut off. I am guessing some kind of electrical problem, since it is getting fuel and turns over fine, but I don't know where to start. Rather than just replacing parts, where should I start? What is most likely the problem that would cause the engine to shut off and then not even pop when it is cranking?

Any help is appreciated.

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Klyde

08-25-2005 04:52:51

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Re: Case 448 Electrical Problem in reply to joe1966, 08-24-2005 19:17:22

simple stuff first

Wire to coil not connected to ign switch. or no 12v from switch
Wire from coil to points broken or shorted (check under points box cover where the wire runs past the condersor,mounting bracket on condenser eats primary wires)
Coil or wires, if one wire is bad it can keep that 2 tower coil from getting spark to the plugs. hth

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gary case

08-27-2005 06:21:20

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Re: Case 448 Electrical Problem in reply to Klyde, 08-25-2005 04:52:51

klyde 1 pull plug and leave spark plug wire on turn over and see if there's any spark.if yes it's etheir your condensor or wet points or bad points. o ya check your gas supply also. if no you probably have a bad coil . just remember, AIR SPARK,AND FUEL MAKES THE OLD ENGINES RUN. GOOD LUCK GARY

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Charles W.

05-24-2006 13:31:32

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Re: Case 448 Electrical Problem in reply to gary case, 08-27-2005 06:21:20

how can I get a wire diagram for my case 448 tractor. Oil line came off reservoir. Took all apart. When I put it back togther I didn't have the proper wiring diagram because I messed up in disconnecting the wires and didn't mark them. On right side of the panel board just above key switch there is a square box with a hole in center where a bolt goes. There is a red and yellow wire coming from box.

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John H-WI

08-24-2005 19:41:01

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Re: Case 448 Electrical Problem in reply to joe1966, 08-24-2005 19:17:22

Not sure what your problem might be but I will tell you the three poblems I had with the 2 448's I had. I am assuming you have gas coming to the carb and not a plugged filter or screen in the tank.

1) Bad points, wouldn't let it start.

2) The little box that bolts to the panel on the front lower section of the dash. 13 volts going in but not comming out.

3) Bad starter, wouldn't put out enough power.

Had an 85 and 88 units that I used till 99. Biggest irratation I had was failed starter solenoids. Liked the big tires and mower but lake of dealers and no model updates forced me to go to another model.

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