MTD 8/26 motor replacement - Snowblower Forum : Snow Blower Forums
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post #1 of 11 Old 09-27-2018, 09:40 AM Thread Starter
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MTD 8/26 motor replacement

First of all thank you for having this wonderful forum. I believe I may need to replace the engine on the unit I just got.

My questions are these, one it has an HMSK80 on it currently with electric start. If I get another engine, does it have to be an HMSK or can it just be an HM80? OR are there other options of motors out there for me to look at? I don't have an abundance of cash laying around but if I can get this running like a top again without investing a ton of money, that would be appreciative.

I dismantled the blower down to just the motor. When I turn the blower over by turning the shaft, I can hear that it is an internal issue with the motor.

Backstory: I just got an old MTD 8/26 from my father-in-law. He purchased it new and kept it meticulous and had it professionally maintained until he gave it to me. He started it up this past year after having it maintained and it made a HORRIBLE racket after running it for a couple of minutes. He quickly turned it off and hadn't touched it since. He has since bought a new blower being that this one is 20 years old.

Thanks again in advance,

Steve
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post #2 of 11 Old 09-27-2018, 10:11 AM
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You can put any motor on there as long as it has sufficient power. The two possible expected problems: the 4 mounting holes may not be the same, easily redrilled; the pulley and shaft diameter may not match, get a different pulley or a sleeve to compensate. The length of the engine shaft is also critical. The HMSK80 has a 1" diameter shaft so of course so does the pulley. If you want to go new, Harbor Freight has excellent engines. Some on here have gotten good buys over the internet.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #3 of 11 Old 09-27-2018, 12:00 PM
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You Can't use Just Put Any Engine on it. This is a Double Shaft Engine Special Configuration Made for MTDs. You could make a single shaft motor work with Modifications that won't be worth the time and effort. I have Some of those Engines Available, but don't know Your Location. Maybe someone close to your location has one.
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post #4 of 11 Old 09-27-2018, 09:26 PM
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I stand corrected. My tablet is having problems enlarging pictures. I did not see the two shafts. You need a two shaft engine, or remove the side case and put on a single shaft engine, or flip the gears and such underneath the snowblower around to the other side.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #5 of 11 Old 09-28-2018, 12:12 AM
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i have a few used mtd engines out back, but honestly it not even worth fixing it. you have to use a tecumseh engine as no other engine will fit these blowers. its only a cheap mtd and its worth like 175 running
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post #6 of 11 Old 09-28-2018, 11:43 AM Thread Starter
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Thank you all for your comments. I did find an HM80 motor for cheap that is in good running condition. Will that engine work with changing out items from my engine to that one?
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post #7 of 11 Old 09-28-2018, 05:51 PM
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Yes you can change the front engine cover and convert it to the twin pulley, but youíll have to split the engine case but itís doable.

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post #8 of 11 Old 09-28-2018, 05:55 PM
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sell it buy and st824 for 250 300 put and impeller kit on it
doesnt sound worth trying to fix to me
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post #9 of 11 Old 09-28-2018, 06:36 PM
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The Original Engine Might be Repairable. If you Have Not Yet Done So, Carefully Examine the Block in and behind the Electric Starter Area. If there is no Visible Damage (Hole), It may Only Need a Connecting Rod. Then, Split the Case, and Evaluate the Damage. Rods can be bought on Ebay for around $20. The Only "Special" Tool You'll need is a Ring Compressor.
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post #10 of 11 Old 10-01-2018, 01:21 PM Thread Starter
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Got to tear apart the motor a little bit. Connecting rod broke and marred up the camshaft. I'll let you all know my progress but I got the hm80 engine I posted about previously. Gaskets and seals are to come within the next 1-1/2 weeks. This is the first small engine I'll be doing so I may be asking more questions as I work on it. Thanks again, Steve
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