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post #1 of 26 Old 08-13-2015, 12:44 PM Thread Starter
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New guy, old snow blower :)

Hi all
I just was given a older Jacobsen 8hp 30" unit by my neighbor
Its all cmplete,but i suspect it may need an engine
That part is okay, but before i spend the money, i want to make sure the rest if the machine is ok, as well as understand some more about how it works(gear box,clutch??? ,etc)
I am a mechanic/engine builder and do alot of my own fabrication so im not too worried about the work but more about how it works.
I was thinking of restoring it and had a few questions, and hoped there was somebody on here who was familiar with these units
Thanks
Nick
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post #2 of 26 Old 08-13-2015, 01:35 PM
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Most engines are connected to other parts by belts. Usually the control handles tighten or loosen the belts and that is how the clutch works. A few old designs did use chains and centrifugal clutches though.

Most snow blowers use a fiction disc for the drive wheels. Very simply design that doesn't really break. Generally you just need to clean things up and then maybe a new rubber wheel and a couple bearings.


Some older ones did have gear drive transmissions though. Best just to pull the bottom cover off and have a peek.

The front auger gearbox is the issue. Make sure the gears are good and everything spins properly. Some old ones have the augers rust to the shaft which then means the gears break instead of the shear pins when people hit stuff. That can be expensive to fix.



Please direct all snow blower questions to the forums and not to me with PMs.
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post #3 of 26 Old 08-13-2015, 05:49 PM
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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 #4 of 26 Old 08-13-2015, 11:55 PM Thread Starter
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Quote:
Originally Posted by Shryp View Post
Most engines are connected to other parts by belts. Usually the control handles tighten or loosen the belts and that is how the clutch works. A few old designs did use chains and centrifugal clutches though.

Most snow blowers use a fiction disc for the drive wheels. Very simply design that doesn't really break. Generally you just need to clean things up and then maybe a new rubber wheel and a couple bearings.

https://www.youtube.com/watch?v=VgHH_Tcufx4

Some older ones did have gear drive transmissions though. Best just to pull the bottom cover off and have a peek.

The front auger gearbox is the issue. Make sure the gears are good and everything spins properly. Some old ones have the augers rust to the shaft which then means the gears break instead of the shear pins when people hit stuff. That can be expensive to fix.

https://www.youtube.com/watch?v=bwb2LBnt5ss

https://www.youtube.com/watch?v=wFOVWb_QP5k
Thanks for.the reply. Tonight after dinner i went out and removed the incorrect Auger to shaft bolts and made sure everything spins freely.
Next was figuring out why the gear lever felt frozen . I figured out that the shaft the Friction wheel rides/ slides across ,was a little rusted and the grease was old,dirt caked. After some brake clean, and a light sanding , and some fresh grease, it shifts like a champ.
So next up is trying to free up the motor. If i am unsuccesful , does anyone make a replacement 1" shaft , 8hp motor thats comparable to the origjnal Techcumsa ??
Thanks again.
Im liking this site already. Hahahahha
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post #5 of 26 Old 08-14-2015, 02:24 AM
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Quote:
Originally Posted by Nevdos View Post
Thanks for.the reply. Tonight after dinner i went out and removed the incorrect Auger to shaft bolts and made sure everything spins freely.
Next was figuring out why the gear lever felt frozen . I figured out that the shaft the Friction wheel rides/ slides across ,was a little rusted and the grease was old,dirt caked. After some brake clean, and a light sanding , and some fresh grease, it shifts like a champ.
So next up is trying to free up the motor. If i am unsuccesful , does anyone make a replacement 1" shaft , 8hp motor thats comparable to the origjnal Techcumsa ??
Thanks again.
Im liking this site already. Hahahahha
I would suggest repowering with a Honda Clone. Easy starting the 212cc Predator engine compares well in power to the original 8hp flathead engine. I should know since I replaced an 8hp Briggs flathead with a Harbor Freight Predator 212cc and it more than holds it own compared to the old engine. If you want even more Power you can get the 301cc Predator and it would easily out perform the old engine.

Last edited by GustoGuy; 08-14-2015 at 02:29 AM.
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post #6 of 26 Old 08-14-2015, 06:58 AM
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Since this is a 30" blower with a 1" output shaft I would look for an 11 to 13hp engine to replace it.

While you could use a harbor freight 6.5hp engine and change the pulley to accommodate the 3/4" shaft or use a bushing I think that the 6.5 is just too small for a 30" machine.

If you could find a used Honda gx340 or a gx390 they would make a great replacement

Harbor freight used to sell an 11hp gx340 clone engine (which i have on a 26" machine) that would have been ideal for this application but it is no longer available.
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post #7 of 26 Old 08-14-2015, 02:02 PM
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I love "new guy, old snow blower". That pretty much describes most of us here.

I've fallen and I can't get up !!


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

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post #8 of 26 Old 08-14-2015, 03:10 PM
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[QU ofOTE=CarlB;660857]Since this is a 30" blower with a 1" output shaft I would look for an 11 to 13hp engine to replace it.

While you could use a harbor freight 6.5hp engine and change the pulley to accommodate the 3/4" shaft or use a bushing I think that the 6.5 is just too small for a 30" machine.

If you could find a used Honda gx340 or a gx390 they would make a great replacement

Harbor freight used to sell an 11hp gx340 clone engine (which i have on a 26" machine) that would have been ideal for this application but it is no longer available.[/QUOTE]

Wow only 8 horses on as Big of a machine as 30 inches. The 301cc Predator would probably work well. I replaced an 8hp on a 26 inch wide machine and the 212cc Predator was just as capable
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post #9 of 26 Old 08-14-2015, 03:57 PM
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Both my Ariens 32"s are relatively small hp, 7 & 8 hp. It gets the job done but it's so much nicer to have more torque. Ran the 1332 Toro last year but didn't have any snow to actually load it down. I'm looking forward to that first 2'+ EOD and enjoy following the hungry PowerShift walking through it
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post #10 of 26 Old 08-14-2015, 07:48 PM
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if I could I would go with the 301cc predator motor on the jake unless like me you need electric start

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
william
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