Brand new Ariens 30inch Subaru motor conversion - Snowblower Forum : Snow Blower Forums
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post #1 of 25 Old 01-23-2018, 04:02 PM Thread Starter
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Greetings just going to give everyone a little tip

If your looking to upgrade your more recent 921 series 28 deluxe or 30 Deluxe
Brandnewengines has a Subaru SX40 14hp 404 cc overhead cam with timing chain, 1inch shaft, cast iron sleeve, 7 litter tank for 299 shipped.
I do believe it comes with a 60watt coil but I think you can swap it for a 200watt coil for led lights and sound system.

I bought my 30 Deluxe model 921047 with the AX306 about 2 months ago and like a typical fool I can't leave anything alone even something new I must modify it.

Anyways the Subaru motor bolt holes line right up.
The shaft size and hight are perfect.
I did have to cut off 1/2 a inch of the shaft.

The Subaru motor has a stepped 1 3/8 dia about a inch deep right next to the motor which needs to be addressed. Being I'm putting a 72102800 track kit on as well I have a new pulley to install for the wheel drive.
I just went to a local machine shop and had them open the back of the pulley up to 1 3/8 and 5/8s deep.

Only possible down side is now I only have about 7/16s of key stock keeping the pulley from turning on the shaft.

A little bending of the stock belt fingers as the bolt holes are a little off on the Subaru motor and it's all good.

First impressions are it's much quieter and smoother than the AX306 that was on it. The 306 vibrated so bad the the machine had many irritating rattles. I also found the 306 to start lugging pretty hard in 16 inches of snow. Maybe it's because it wasn't broken in yet fully.

Also another bonus it has a 7 litter tank. I've seen some people on the forum complaining about the smaller Ariens tanks.

Anyways it looks good on there and even looks like it could be factory, machine balance does not seem to be affected with the bigger motor.

Please forgive my sentence structure and grammar, I'm a fixer not a poet.


If anyone wants I can maybe put some pictures up tomorrow.

Last edited by Madriver; 01-24-2018 at 10:41 PM.
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post #2 of 25 Old 01-23-2018, 04:06 PM
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Kool! Yes, I'd like to see some photos of your work.
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post #3 of 25 Old 01-24-2018, 09:37 PM Thread Starter
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New Larger sheave machined to fir step on motor shaft




Tracks from the track kit, I thought the drive wheels would be plastic but they are cast iron yay


http://youtu.be/6FUm1y7kOKY

Subaru SX40 running

Last edited by Madriver; 02-09-2018 at 09:44 AM.
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post #4 of 25 Old 01-24-2018, 10:07 PM
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Attempt at linkage.
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post #5 of 25 Old 01-24-2018, 10:18 PM
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Very nice, thanks for sharing!

And the engine picture helped. I didn't realize that you meant it's an overhead cam engine with chain *cam* drive. I thought it had a chain sprocket on the crankshaft, for driving, well, something with a chain. I've only heard good things about the Subaru engines, that should be a really nice machine!

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post #6 of 25 Old 01-24-2018, 10:45 PM Thread Starter
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Quote:
Originally Posted by dbert View Post
Attempt at linkage.
brandnewengines.com
If you look at the shaft you can see where it is 1 inch and 3/8s. You either need to grind that off which would be a little shade tree or you can have the drive pully machined so 5/8s of it will slip over the larger shaft area.
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post #7 of 25 Old 01-24-2018, 11:19 PM
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Madriver: We like you already. Welcome to the forum!
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post #8 of 25 Old 01-24-2018, 11:42 PM
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Very cool upgrade. Just be advised Subaru is no longer in the small engine business.

I'm finding it a pain to find some things that I need at the moment.

Bob
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post #9 of 25 Old 01-25-2018, 02:17 AM
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Quote:
Originally Posted by Madriver View Post




Tracks from the track kit, I thought the drive wheels would be plastic but they are cast iron yay


http://youtu.be/6FUm1y7kOKY

Subaru SX40 running
That's a big engine! I bet the neighbor will hate your guts....

Bob
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post #10 of 25 Old 01-25-2018, 08:24 AM Thread Starter
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Subaru has a third party looking after parts support and warranty now that they are getting out of the small engine buisness.
Hopefully maybe some one will buy the rights to continue making these motors.

They sure seem pretty technically advanced and we'll made.




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Very cool upgrade. Just be advised Subaru is no longer in the small engine business.

I'm finding it a pain to find some things that I need at the moment.
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