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ChrisD


Joined: Feb 10, 2009
Points: 4

New engine replacement for Simplicity 724 with Tecumseh H70
Original Message   Feb 10, 2009 4:49 pm
My dad's Simplicity 724 with the Tecumseh H70 bit the dust on Saturday. 

I've looked at replacing the engine with a B&S, but it appears the B&S output shaft turns in the wrong direction (CCW),  and the pull starter would be facing the front of the machine.  

The H70 is a 7.0 hp, 3/4" output shaft on the left of the machine when you are in position.

Any ideas?

Thanks!

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ChrisD


Joined: Feb 10, 2009
Points: 4

Re: New engine replacement for Simplicity 724 with Tecumseh H70
Reply #6   Feb 17, 2009 10:49 am
Marc, all,

You are correct - it is a paddle wheel Simplicity 724 model with the H-70 motor.  I did confirm a CCW rotation of the shaft which is on the left side (in operator position).

My dad (87) just hates parting with his old stuff.  I have to admit - it's a beast of a machine.  It (H70) threw a rod, and that was after I repaired it 2 years ago.  Makes me believe there was something else wrong.

The replacement Tecumseh motor's pull starter would face front, but it wouldn't be a problem since I could pull the starter rope outwards past the machines handles.

I believe I would need a spacer block, as the H70's shaft height is higher than the replacement's  - 4.125".  I'm going to remove the motor on my next visit, and get the measurements.  I did see the snow motor on the http://smallenginewarehouse.com site for $240.  That will work, I believe.

Marc - One thing that might be a problem - the machine's belt guides are bolted to the H-70's motor area near the output shaft.   Is this going to work with the new motor?  What did you do?

Thanks - great forum!

This message was modified Feb 17, 2009 by ChrisD
mml4


Snow is good,
Deep snow is better!


Joined: Dec 31, 2003
Points: 544

Re: New engine replacement for Simplicity 724 with Tecumseh H70
Reply #7   Feb 18, 2009 12:09 pm
Chris- The 524 I am working on has the original 5hp in working condition so no replacement is necessary. I don't know if the replacement Tec. OHV has the tapped holes for the belt guides. I would suggest you call SEW and ask. Most blower engines I have seen have a # of tapped bolt "receptacles " as it is pretty standard fare to have belt guides on most every machine.

I am curious as to what you mean when you say the starter faces forward. If you mean the direction you pull the rope is forward that is easily changed as was pointed out by Friiy in a previous post.  As he pointed out all you need do is rotate the pull starter assembly to a position favoring your installation.

Marc

This message was modified Feb 18, 2009 by mml4


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ChrisD


Joined: Feb 10, 2009
Points: 4

Re: New engine replacement for Simplicity 724 with Tecumseh H70
Reply #8   Feb 19, 2009 12:33 pm
Marc,

I can try to rotate the starter.  Looks like there are extra holes. 

Need to assess the bolt pattern for the guides.  The drawing doesn't specify spacing, just bolt size.

I will call SEW once I measure my old H-70's bolt pattern.

Thanks all,

Chris

This message was modified Feb 19, 2009 by ChrisD
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