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#1 michaelj OFFLINE  

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Posted April 22, 2012 - 08:42 PM

just purchased a ingersoll 448, the seller purchased a 20 hp onan shortblock and basically built a
new motor. When starting it the motor turns over slow then speeds up and where the positive
cable connects to the starter it gets hot.. The stud coming out from the starter was loose and I tightened it but it made no difference . Is the starter just bad?

#2 chris m OFFLINE  

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Posted April 22, 2012 - 08:47 PM

It's possible or you could have a bad connection on something else. If motor turns free by hand and no other dirty or loose connections, then I would say the starter is at fault. maybe you could even take the starter apart and check the brushes and commutator to see if there just dirty. Good luck
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Posted April 22, 2012 - 10:07 PM

^ good idea, another thing you might consider is...once removed hook some jumper cables to it, be careful because it will have a tendency to jump around, but once secured it will spin freely with no bind...but like Chris indicated, clean the armature, make sure the bearings/bushings are greased, the commutator is clean, the armature is clean the dividers on the armature are good and the brushes are clean, to do the cleaning you're going to want to use emery or 400 grit paper, with some electrical contact cleaner. Reassemble making sure everything goes together properly and secure, you should be back in business...GL
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#4 jimbobbillyray OFFLINE  

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Posted April 22, 2012 - 10:19 PM

It is possible that you have a bad starter cable.

If you decide to take apart your starter and clean it, after you sand the armature, which is more like polishing (because you are making the copper shiny again) blow it with air, then clean it with electrical contact spray. let it dry or blow it dry. You don't want any left over from the sanding process left in the armature. Take care when you put it all back together. They can be tricky. if your brushes are worn out you can still find new ones on line (www.gphope.com is one site that sells them) and they will also sell you a whole new starter if you don't want to fool with the one you have.

Edited by JBBR, April 22, 2012 - 10:22 PM.

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#5 JDBrian OFFLINE  


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Posted April 23, 2012 - 10:40 AM

Since there is heat at the connection to the starter also check the cable end to make sure the terminal is tight and that the cable is not partially broken at the terminal. While you are doing all this make sure you have a good connection from the chassis of the starter/engine and the battery - terminal. Good luck getting it sorted out!

#6 Rick OFFLINE  



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Posted April 23, 2012 - 04:01 PM

My 446 did the same thing started slow one day it started then the starter broke and hung by the wire.Sounds like a bad stater there is an air gap on it also of 25 thousands between the flywheel and the drive gear.