Just picked up a 724D without Engine - Snowblower Forum : Snow Blower Forums
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post #1 of 14 Old 11-27-2017, 01:22 PM Thread Starter
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Just picked up a 724D without Engine

Hello. New member here. I spotted a JD snowblower at the local junk yard sitting next to the scrap metal dumpster. It was missing the motor, but looked to be in really good shape. So, I loaded it up and took it home. Upon checking the serial number, it appears to be a 2001 model. I'm thinking about using a 6.5hp predator motor. One of the problems is that I don't have the pulleys that go on the crank. Everything else is there, the belts and tensioner pulleys and both lower pulleys. I looked on the JD parts catalog and it appears that there were two different pulleys that are used. One went on the crankshaft and the other went on a shaft next to it.

So, my question is can I make this work without the extra shaft and just use a double pulley on the crankshaft for both belts? Or am iI looking at the diagram wrong? Obviously, I'd probably have to change both belts to work with double pulley. This my first snowblower, btw. Thanks
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post #2 of 14 Old 11-27-2017, 01:36 PM Thread Starter
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I did find this double pulley used in 526 and 726 snowblowers. Part number M45490
Ebay link:
https://m.ebay.com/itm/John-Deere-M4...pid=1600659092

Not sure if it would work. It is for a 3/4" shaft.

Last edited by race21; 11-27-2017 at 01:39 PM.
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post #3 of 14 Old 11-27-2017, 02:00 PM
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they make sleeves to go from 3/4 to 1 inch lots of them on fleabay
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post #4 of 14 Old 11-27-2017, 02:44 PM
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Sounds Like You'll need a Double shaft Engine. Posting the Model Number Helps Us to Help You.
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post #5 of 14 Old 11-27-2017, 03:57 PM
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Last edited by jtclays; 03-13-2018 at 03:21 PM.
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post #6 of 14 Old 11-27-2017, 07:57 PM Thread Starter
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Quote:
Originally Posted by jtclays View Post
From JD parts site the original engine was Tecumseh OHSK70-72507B which had dual output shafts. The original ran the transmission with the camshaft PTO which runs opposite the crankshaft. Problem trying to run a single PTO shaft is your drive speeds will run backward (you'll end up with 6 reverse and 2 forward). You can test it easily to make sure with the belt cover off. Put the speed selector in any forward gear, zip tie the drive handle down, stick a block or box under the belly pan to get the tires off the ground a bit and rotate the drive pulley inside the belt cover counter clockwise as you face the front of the blower. The wheels will turn backward. If they turn forward a single shaft will work.
Also, if you got the belt cover with the machine looking inside will likely show two clear areas where the old sheaves were.

Ya, I just checked it out. I did what you suggested and the wheels do rotate backwards. So, is there anyway around this without using a double shaft engine? The serial number is: MO724DX201641 and is a 724D W/B. Thanks for all the helpful info.

PS. The belt cover was gone.

Last edited by race21; 11-27-2017 at 08:10 PM.
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post #7 of 14 Old 11-28-2017, 09:49 AM
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Look

Last edited by jtclays; 03-13-2018 at 03:21 PM.
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post #8 of 14 Old 11-28-2017, 04:20 PM
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Thanks for the Plug, JT...I do, actually have an Ariens Double Shaft Engine, as Pictured in the Post Above. However, We Don't know the OP's Location.
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post #9 of 14 Old 12-05-2017, 06:12 PM Thread Starter
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I located a 8hp Tecumseh dual shaft engine on Craigslist. Will this work?
https://madison.craigslist.org/grd/d...409479005.html
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post #10 of 14 Old 12-05-2017, 06:21 PM
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Yup.

Last edited by jtclays; 03-13-2018 at 03:44 PM.
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