10k Series Gearbox Max HP? - Snowblower Forum : Snow Blower Forums
 
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post #1 of 4 Old 05-26-2012, 02:32 AM Thread Starter
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10k Series Gearbox Max HP?

Hello there! I am looking into replacing the H60 on my '68 Ariens 10k series with one of the larger 8-11HP Tecumseh engines I've got sitting in storage.

My concern is that I do not want to overpower the auger gearbox with too much horsepower. I understand that the shearpins / belt would likely break easier, but there's always the chance that I could twist the spline shaft / wreck the gearbox if there's just too much power.

I would appreciate the insight if anyone knows of its limitations.
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post #2 of 4 Old 05-28-2012, 08:31 PM
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Replacement motor

Fairway

Not the most knowledgable on Ariens but here's some info as I understand it. Auger assembly and tractor units were sold separately so you'd buy what you wanted and combine them to have a final product. Based on that, sounds like the gear cases are designed to work with all HP ranges for a given year. If they sold a 8 hp then it should work, same with a 10 hp or whatever. Having said that, if you're going to up the engine, I'd feel better with the HP being a 8 HP (1/3 increase over a 6) vs a 10 HP (2/3 increase over a 6 HP).

The other thing, I don't know where a 6 hp falls in the Tecumseh arena, is it more like a 5 hp or 7 hp? You'd want to check the bolt pattern where it mounts to the tractor unit, throttle and cabling, crankshaft (including the number) diameter and length and vertical distance from mounting surface to centerline.
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post #3 of 4 Old 05-29-2012, 10:43 PM
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I dont think it would be a problem at all. i had a small 4 hp 20 inch ariens and the gearcase was massive. for curiousity i looked it up (part number 10180 for the case itself) and i found they used that gearcase on 4 hp 20 inch up to 8 hp 32 inch blowers.

in model ranges from the first unit , 10000 series, 922000, 924000 series.

go the the ariens parts radar website and look it up by part number not model number on it will show you the models it will fit. click below

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post #4 of 4 Old 06-09-2012, 10:54 PM Thread Starter
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Thanks for your input, guys. I've got 3 10,000 series, and a 924 series that all have the same gearbox. I suspected that it was capable of handling extra horsepower, but wanted to confirm this before I do the conversion.

I did notice that my 924 had an extra set of holes pre-drilled into the tractor base for mounting larger blocks, probably HM series Tecumseh, though mine only came with the smaller H70. I will assume this confirms what you were saying.

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Originally Posted by HCBPH View Post
The other thing, I don't know where a 6 hp falls in the Tecumseh arena, is it more like a 5 hp or 7 hp? You'd want to check the bolt pattern where it mounts to the tractor unit, throttle and cabling, crankshaft (including the number) diameter and length and vertical distance from mounting surface to centerline.
The Tecumseh H50-H70 share similar bolt patterns and physical dimensions, but the HM series are bigger - thicker mounting base, longer sump covers, and obviously larger block - so the engine will have to sit back a couple inches or more, I believe. Not sure of the height of the shaft, but I believe it's relatively close or the similar to the H series.

Last edited by Fairway; 06-09-2012 at 10:57 PM.
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