Imperial 626 with 8 HP predator clone - Snowblower Forum : Snow Blower Forums
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post #1 of 18 Old 12-01-2014, 02:22 PM Thread Starter
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Imperial 626 with 8 HP predator clone

Long time reader, first time poster!

I have an old Jacobsen 626 with the Tehcumseh H60 that I found for free on the side of the road. It was running ok, but it seemed like it was putting out way less than the 6 hp it was rated for. With the wet, heavy snow we just got in MA for Thanksgiving, I got a little frustrated and decided to either rebuild the engine or swap it out.

I picked up a 301cc 8 HP predator from Harbor Freight. The swap was relatively easy, just some drilling to mount the new motor. My auger tensioner needs a little work because the old setup couldnt bolt back on, but the current setup held up through blowing the slush around my back yard nicely. I blew it into about a 2 foot pile and I was still chewing through it without bogging down.

I was wondering if I should change the auger pulley size to throw faster now that I have some more HP? Both the auger and the forward drive pulley are 3" OD.

Pic below, more to follow if anyone is interested in more info
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post #2 of 18 Old 12-01-2014, 03:11 PM
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Hello and welcome to the forum CADDAMCZYK . Nice job keeping the old machine going. In my opinion, if the gap between the impeller blades and the housing is larger the 1/4", you would gain more from adding an impeller kit to it. You can search the forum or internet for how to construct and install this modification. Many people here (me included) have made our own with cheaply purchased materials and an hours worth of time. It is critical to keep the auger belt tight and in good condition to see the best performance with or without the impeller modification. The added horse power will help chew deeper snow without bogging down, but the RPM's are about the same (3400-3600) as the stock motor.

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post #3 of 18 Old 12-01-2014, 03:21 PM Thread Starter
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I was looking into the impeller kit and I think I might give it a try when I have some time. I've seen some youtube videos of that mod and it seems really effective. I think I saw someone on this forum use baler rubber from tractor supply, so I'll look into that.

I love the old machines like this one. I particularly like how the drive system is so simple on this thing.
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post #4 of 18 Old 12-01-2014, 03:42 PM
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I used the rubber from an old set of single stage paddles that worked out very well. I guess you could also find an old tire and use the sidewall rubber if want.

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)

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post #5 of 18 Old 12-01-2014, 06:38 PM
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Why not a pulley swap AND an impeller kit!!! I wouldn't go crazy on the pulley size, just adding 1/2" will help.

'77 Ariens 924032 "Brick House" Re-Powered with a TEC 10HP and oversize auger pulley
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post #6 of 18 Old 12-02-2014, 07:57 AM
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Pulleys

I won't go crazy on oversizing the pulleys. You need to remember things like the auger gearcase needs to take both the additional speed along with if you impact something it could shock it harder. Depending on the type gearcase you have, with the larger engine and additional speed it may have longevity issues in the future.

Good luck
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post #7 of 18 Old 12-02-2014, 11:01 AM
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hello caddamczyk, welcome to SBF!! if the 8hp predator motor works as good as the 6.5 you've just built yourself one heck of a snowblower. you might want to look into adding a heater box to the carb like a few of the guys using the 6.5hp motor have done

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post #8 of 18 Old 12-03-2014, 05:33 PM
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I'm not a fan of the aftermarket "offshore" small engines, but that was a good save. better than the machine getting scrapped, that's for sure. nice job.




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post #9 of 18 Old 12-04-2014, 10:20 AM Thread Starter
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I think I'll leave the pulleys the same for now until I can do some testing with some actual snow. I am definitely going to be doing an impeller kit and a heater box. I've done some research and it looks like this motor is a clone of the Honda GX240, so the carb looks to be the same as the Honda GX240 carb, except the HF carb is not adjustable. The Honda carb may have slightly bigger jets too. I might pick up the Honda carb because they're only about $15-$20 on eBay.

There's not too much info about these motors anywhere. No where near as much as the 212cc.

Cant wait for some more snow to do some tweaking on this thing.

Last edited by CADDAMCZYK; 12-04-2014 at 11:38 AM.
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post #10 of 18 Old 12-05-2014, 12:33 AM
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I agree with HCBPH. I am in the process of getting my predator going on my MTD.

I decided to stay with the same size auger pulley for those reasons. Plus where I live, if I throw the snow 40 feet it would piss off my neighbors.

If you can get an adjustable Carb go for it. I know John is trying to come up with one for the 212 cc along with his other amazing projects and work.

I also appreciate those who save older machines.

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