Toro Repower 724. my first repower project. - Snowblower Forum : Snow Blower Forums
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post #1 of 21 Old 10-09-2014, 02:51 PM Thread Starter
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Toro Repower 724. my first repower project.

Last year I purchased a Toro 724 with a seized motor. this year I purchased the Predator 6.5 hp motor from Harbor Freight. I have attached some Pictures of the progress so far but any info on what else I will need to purchase would be great! I also have read the Thread on a similar Toro 724 that was repowered, but still not exactly 100 percent on everything I need or where to get it! thank you all in advance!
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post #2 of 21 Old 10-10-2014, 06:16 AM
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Make sure the pulley of the crank is the same size. you might have to use a different size belts. let me know if you need more help..

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #3 of 21 Old 10-10-2014, 01:39 PM Thread Starter
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Do you know where i could get a sleeve adapter so i can fit the original 1'' pulley on the new motor?
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post #4 of 21 Old 10-10-2014, 02:56 PM
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post #5 of 21 Old 10-11-2014, 07:22 PM Thread Starter
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Thank you! does anyone know the exact model or size of belts i will need, or anything else besides the adapter sleeve?
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post #6 of 21 Old 10-12-2014, 01:07 PM
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If you're not able to get a part number off the old belt, or have to modify the engine position or bought a larger pulley, then just bring the old belt to an auto parts store and they can measure it. If worse comes to worse, but a few of them in different lengths and try each one until you find the best one, then return the unused ones

1972 Ariens 13/32 restored & repowered
1971 Ariens 7/24 (retired)
2011 Ariens Deluxe 24
1980 Ariens st7/24 (retired)
1985 Ariens st10/36
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post #7 of 21 Old 10-12-2014, 01:41 PM
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To select belts by size or part number.
http://outdoorpowerinfo.com/belts/
Select show/hide belts pick list
Select -T for Toro
Select- Toro
Look for the belt part number (if you know it)
Next to the part number will be a size such as Toro belt number 110376 is a 1/2"x38.5"belt or 4L385.
-OR-
You can use this calculator. Remember to add about a 1/2" inch? to the measurement if you need the belt to be slack, such as on an auger drive.
http://www.calculatoredge.com/mech/vbelt%20length.htm
You can go to Toro's web site and download the parts list for your model which will show the Toro belt numbers.

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)
Toro 421-E (38585) 2008 (New Owner)
Experience is something you don't get until just after you need it.
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post #8 of 21 Old 10-12-2014, 07:46 PM Thread Starter
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Thank you i will purchase belts after the sleeve adapter comes in, on the old motor the shaft was 3'' long with the new predator engine the shaft looks a little shorter and it is 2.43 will getting a 3'' long shaft adapter still work or should i stick to the length adapter to what the new engine is?
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post #9 of 21 Old 10-12-2014, 11:18 PM
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You can put the 3" adaptor on it for more stability. If you stick with the double stock pulley in the picture you can get away with a shorter one. You can get a 3" long one on ebay. If you decide to use different pulley set up and it is too long you can always grind a bit off or cut it down.




This comes with a stepped key that fits the 3/16 key in the Predator and steps up to 1/4" for the 1 inch bore pulley. Your pulley would need a 1/4" key for it to work as intended.

You may also want to put an appropriate length bolt and washer on the end of the PTO shaft. On the predator it is a 5/16-24 UNF thread.

Current machines
Ariens 926LE

Yard Machine 22" upgraded with 6.5 HP Predator
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post #10 of 21 Old 10-18-2014, 12:45 AM
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I'm going to repower my 521 unit. I'm thinking about doing the same thing you are. Any updates on your project?
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