Ariens uses LCT engines so I was looking there. Are you sure it isn't 14 teeth?

Starter SnowBlower ACQD170a, JQ170-2, USA Specs
• 110 Volt, CCW, 14-Tooth Pinion

 

Could be , I am counting the teeth of the reconstructed remnants.

 

Here is a pic of the piece.

 

wow. I would inspect the fly wheel gear teeth and make sure they are ok. if they are just some burrs on it, you may be able to clean them up with a file.

 

I have changed a few of those .. the most difficult part is the "C" ring clip usually holding it in place ... as mentioned, you probably want to inspect the flywheel.

Note: They actually make a tool for the end C clip, but I dont do enough to merit buying it.

 

It is a small gear that slides over the drive shaft spline. Not held on by any clips. Fly wheel is fine. Just need a source for the gear pictured above.

 

Gear fits over the visible spline.

 

Oh, I thought it was the end gear like the one in your recent post, the one held on by the C clip.

 

Ditto, I thought the same... A picture sure helps. Never saw one of those broken before. What's the outside diameter of the splined shaft and how many splines? What's the approximate outside diameter of the broken 15T gear? I've attached a brief summary on spur gears. Maybe we can match it to something...

Sadly, you may need to buy the whole starter ($40-60):

Fullas Starter Motor JQ170 Compatible with Ariens Snow Blower 24 [amazon_B08XZBB2RG] - $40.00 : High-level quality and good price, also the perfect after-sale service are provided.

High-level quality and good price, also the perfect after-sale service are provided. Fullas Starter Motor JQ170 Compatible with Ariens Snow Blower 24 [amazon_B08XZBB2RG] - This fits your . Make sure this fits by entering your model number. Fits for 24/14.5,12524sb, Engine Plmhk19850781de, Ariens...

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Or contact these guys: 3D CAD and Part Search

 

Did you ever have any luck sourcing a replacement gear? Mine is having the exact same issue

 

i want to revive this thread i have looked high and low for that pinion gear step gear spud gear i hope someone can be of assistance