Thoughts on re-powering Toro PowerMax 724 - Snowblower Forum : Snow Blower Forums
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post #1 of 17 Old 01-25-2018, 12:52 PM Thread Starter
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Question Thoughts on re-powering Toro PowerMax 724

Hi fellows, new here, but mechanically inclined.
I intend to re-power my Toro PowerMax 724 Briggs & Stratton 900 Snow Series for a B&S 1450 Series.
Basically my engine is a 12D105-0172F8 model and the one I'm looking at is model number 20M307-0001-F1
Same Shaft diameter and basically the same length.
As any one ever did this swap?
Thanks for your input.
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post #2 of 17 Old 01-25-2018, 01:37 PM
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You are going to have to get different belts maybe. other than that it should be a piece of pie. ALOHA from the Paradise City.

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #3 of 17 Old 01-25-2018, 02:04 PM Thread Starter
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Thanks Powershift.
That's what I tought. Should not be that big of a deal to swap
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post #4 of 17 Old 01-28-2018, 03:24 PM Thread Starter
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Ok.
Just wanted to keep you posted on my engine swap.
the engine I bought is a B&S 1450 Series moldel 20M307-0001-F1.
Correction for my snowblower, it is a Toro PowerMax 726.
The new engine is a bolt-on on the base of the snowblower. The base plate is already pre-drilled for the mounting of the 1450 series. No modification what so ever. Belts align perfectly. Now I just have to wait for some snow.
My only question is; that I read on other posts that I shouldn't go WOT during breaking period. Is this true?

Thanks for your input and thanks to POWERSHIFT93 for his comments
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post #5 of 17 Old 01-28-2018, 04:35 PM
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Quote:
Originally Posted by Makriluc View Post
Ok.
Just wanted to keep you posted on my engine swap.
the engine I bought is a B&S 1450 Series moldel 20M307-0001-F1.
Correction for my snowblower, it is a Toro PowerMax 726.
The new engine is a bolt-on on the base of the snowblower. The base plate is already pre-drilled for the mounting of the 1450 series. No modification what so ever. Belts align perfectly. Now I just have to wait for some snow.
My only question is; that I read on other posts that I shouldn't go WOT during breaking period. Is this true?

Thanks for your input and thanks to POWERSHIFT93 for his comments
Run the engine full bore open for 5 hrs using dino oil. then after the 5 hrs is gone with the Schwinn. then you can use whatever brand weight of oil that suits your fancy.

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #6 of 17 Old 01-28-2018, 04:51 PM
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did a 928 38801 powermax from a 265 cc loncin to a 1128 ,38680 spec brigs 342 cc https://www.smallenginesuppliers.com...gines1855.html, from a earlier year not one issue direct bolt on, pulley was a bolt on ,i used the 1128 belts to play safe as the briggs crank center line is 1 inch higher
if careful it's not hard to swap with a bigger motor turning a bear into a cougar.
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post #7 of 17 Old 02-01-2018, 04:14 PM
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Quote:
Originally Posted by Makriluc View Post
Hi fellows, new here, but mechanically inclined.
I intend to re-power my Toro PowerMax 724 Briggs & Stratton 900 Snow Series for a B&S 1450 Series.
Basically my engine is a 12D105-0172F8 model and the one I'm looking at is model number 20M307-0001-F1
Same Shaft diameter and basically the same length.
As any one ever did this swap?
Thanks for your input.
I swapped to that exact engine on a Troy-Bilt 2410 (got rid of the original 179cc engine). Probably not much difference in making the swap, as you will just need to find the matching bolt holes on the chassis of the Toro, which it sounds like you did. I'm not in love with the Briggs 305cc 1450 series, but it is OK. It has the 60 watt charging system, so you can connect to lights or add them as needed.

Here is a link to my thread: https://www.snowblowerforum.com/forum...b-s-305cc.html

Since the shaft dimensions are about the same (as you indicated), I assume that you were able to re-use the pulley(s) from the original engine, which simplifies matter greatly.

Regards, Ted
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Current & Past Fleet:
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1988 Toro 521 w/ 212cc Predator Engine
1985 Toro 3521 w/ 179cc Powermore Engine (SOLD)
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post #8 of 17 Old 02-01-2018, 05:02 PM
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to SBF Makriluc

You sure won't feel any lack of power in that setup !!

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Make sure the windows are up before the snow plow goes by !!

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post #9 of 17 Old 02-01-2018, 05:55 PM
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I'm just finishing up a similar re-power on a Toro 724, it's not a powermax (I don't really know the difference) IT's an older model, I had to re-route the chute rotation, which I don't think is a problem for you. .

It's basically a straight forward swap.
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post #10 of 17 Old 02-02-2018, 06:38 AM
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PowerMax has the joystick chute control and the recirculating impeller housing. Most of the current-day engines on a re-power tend to interfere with the old-style chute control shafts. Something to consider beyond just the mounting dimensions.

.
@Makriluc - got some pictures of the re-powered machine?

Regards, Ted
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Current & Past Fleet:
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2003 Ariens ST824LE (SOLD)
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1988 Toro 521 w/ 212cc Predator Engine
1985 Toro 3521 w/ 179cc Powermore Engine (SOLD)
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