Model #HM80-155140D Tecumseh engine

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Question and Answers

Q:

replacment alternative engine for craftsman yardvac/chipper 8hp. Tecumseh

A:

I have looked up the HM80 engine. I see that some have a solid state ignition that do not use points and condenser and others have point and condenser. If you model does not have points and condenser and you have set the air gap to .010 I would suspect a damaged coil. Before ordering the coil again, I recommend checking the magnetism of the magnet. It should hold something metal to it. When you pull it off, it should have a bit of resistance. Please reply below with the complete model number if you model has points. I will be happy to advise you on how to replace them. Thank you for using Manage my life. Mark.

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Mark T -
Sears Technician
April 14, 2012
A:

The engine shaft is tapered (no puller available for this) you have to break the impeller loose from the shaft. Remove the bolt and washer holding the impeller on the motor shaft. Start the bolt back in the hole. Run it in until the head is only 1/8 inch away from the impeller. Place a large screw driver or pry bar between the impeller and the rear of the chipper, and pry hard on one side. Hit the head of the bolt firmly with a good sized hammer. The shock will break the impeller loose and it will come off. If the impeller does not loosen up with a couple of whacks with the hammer use a quality penetrating oil and allow it to sit for at least half an hour. If the impeller does not loosen after that, do not continue banging on it, you could damage the shaft or the engine. I highly recommend calling a service professional to diagnose and repair your chipper. I was unable to find an alternate source for parts that were any cheaper than what you have found. If you require further assistance please resubmit your question with more details. I will be looking forward to helping you again in the near future.

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Mark T -
Sears Technician
July 23, 2012
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