Finding an engine for my Ariens repower - Snowblower Forum : Snow Blower Forums
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post #1 of 13 Old 09-22-2017, 02:44 PM Thread Starter
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Finding an engine for my Ariens repower

So I've posted some questions about this before. I feel like I'm looking for a unicorn....

I've got a 1979 Ariens 924036 (5HP Tec) that I would like to repower.
Here are the list of specs that I want:

1.) Has to fit the current mounting pattern (research shows that the frame won't hold anything larger without significant fabrication, which I'm not able to do)
2.) Electric Start
3.) Charging Alternator
4.) Fairly inexpensive ($250 or less)

Would anyone know what the keyway size for a Tec H50-65422K engine is?

I see LOTS of different engines out there, but I'm struggling with being able to reliably identify what will be as close to a "drop in" replacement as I can find...
For instance I see engines that are "fixed speed 3600 RPM". I've not heard of that before and don't know if that's a reasonable thing to use for my vintage of snowblower.

Last edited by ajpleblanc; 09-22-2017 at 02:45 PM. Reason: left something out
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post #2 of 13 Old 09-22-2017, 02:59 PM
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One question is why are you repowering it? If the engine is bad maybe look for a parts machine with a good Tecumseh 5 HP on it, swap the engine and move things like your starter from the old one to the new would be one option.


If the motor needs a rebuild, maybe price that out.


For a new clone engine, sorry but I don't know of any off the top of my head that are a direct swap and have the options you're asking for.


Hopefully someone more knowledgeable on this will chime in with the answer. Good luck.


PS many of the newer engines are set to run at a constant speed rather than have a throttle on them. Thank the government and emissions for that. I've seen where people have taken parts from an older engine and changed them out on a new one just to add a throttle to it.
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post #3 of 13 Old 09-22-2017, 03:05 PM Thread Starter
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Not bad suggestions.

My biggest enemy here is time. I don't have a ton of time tinker around to get this thing working.
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post #4 of 13 Old 09-22-2017, 03:17 PM
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The Predator 212 will fit with few modifications. You'll need to use longer mounting bolts for the engine, and You will need to sleeve the crank for the engine sheave. 3/4" to 1" inch w/Step Key Gas Engine Pulley Crank Shaft Sleeve Adapter Predator | eBay
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post #5 of 13 Old 09-22-2017, 03:52 PM
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I was also looking for a engine for a project blower, the preditor 212 does not have a charging system stock but for i think $45 you can get a coil that will add power, debating on doing that or rebulding, im dealing with a 7hp tec so another Tecumseh is a little harder to come by than the 5hp, I have 2 of those on the shelf but i need a 7 hp lol

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post #6 of 13 Old 09-22-2017, 04:01 PM
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Quote:
Originally Posted by Dauntae View Post
im dealing with a 7hp tec so another Tecumseh is a little harder to come by than the 5hp, I have 2 of those on the shelf but i need a 7 hp lol

You know that a 7 HP and 10 can be a direct sway? At least they are on the older Craftsman units it was I did the change on. I combined 2+ units to make one with one of original tractor units having a bad 7 HP on it and I put a 10 HP on it without changing a thing. Even the belt guard fit without modification.


Best suggestion I have is get out your tape measure.
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post #7 of 13 Old 09-23-2017, 11:14 AM
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This is actually a double pulley thinking about it DOH a repower may NOT work out so well, It may fit but it matches the 6hp to a T that is on my old Snapper 6/22, I do have a 10hp I could use with double pully but it is in no way as clean looking as this blower is.

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post #8 of 13 Old 09-23-2017, 01:35 PM
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Tecumseh 5,6,and 7 share the same Mounting Footprint. 8-10 uses a different set of holes that may already be punched in the chassis. Some of the same chassis used different engines. Here's a photo of a Typical ST824 Chassis. You can see the Mounting holes for the 7, and Studs where the 8 originally was. If you are looking for a Tecumseh Locally, I may be able to help.

Last edited by Jackmels; 09-23-2017 at 01:51 PM.
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post #9 of 13 Old 09-23-2017, 05:04 PM
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All I can say is the Preditor is so easy to start that electric start is a non issue. A 99 dollar Preditor has gobs of power is is a great replacement for a Tecumseh...I've done many of them.
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post #10 of 13 Old 09-23-2017, 05:43 PM
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Quote:
Originally Posted by cranman View Post
All I can say is the Preditor is so easy to start that electric start is a non issue. A 99 dollar Preditor has gobs of power is is a great replacement for a Tecumseh...I've done many of them.
Ditto !!

Have done 30 or so conversions on ariens machines and not one return or complaint.
Only had one stuck float , probably from shipping, otherwise these Predator engines have been flawless.
Even did several tiller retrofits that performed well.

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