Hacksaw1945 from Wisconsin need help - Snowblower Forum : Snow Blower Forums
 
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post #1 of 10 Old 01-05-2016, 01:05 AM Thread Starter
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Hacksaw1945 from Wisconsin need help

Hi All I am Hacksaw1945 and I have a mid-2000 MTD snow blower 5hp. 24", Tecumseh engine. The last couple years I have noticed lack of power and dying under a load. Did a compression test and only got 60lbs. So I went down and bought the Harbor Freight Predator 212cc engine at new years price $118.00 didn't think that was bad at all. My Tecumseh engine is a single shaft. So I have a lot of questions on pulleys sizes, and belts. The best way to pulley and belt the drive, mine has this tiny 1/4' belt not sure what to do here? So could you guide me to threads and pictures of how other members have done this change over. Thanks Hacksaw1945
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post #2 of 10 Old 01-05-2016, 02:12 AM
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Hi and welcome to SBF.

You might want to check out the re-power section here and maybe post a new thread there with specific issues.


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post #3 of 10 Old 01-05-2016, 04:55 AM
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hello hacksaw, welcome to SBF

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post #4 of 10 Old 01-05-2016, 06:38 AM
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Welcome aboard Hacksaw1945!
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post #5 of 10 Old 01-05-2016, 07:20 AM
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to the forum Hacksaw

It would be helpful if you added the model number of your MTD so we can pull up information on it.

I seriously doubt it's really a 1/4" belt. Maybe a 3/8" worn down to 1/4" ?? ( Edit: guess I'm wrong on that one !! Thanks Shryp)

your thread to Re-Power.

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post #6 of 10 Old 01-05-2016, 11:07 AM
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MTD started using 1/4" belts for the drive wheels a while back. You can keep that or probably switch to a larger belt if you want.

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post #7 of 10 Old 01-05-2016, 12:47 PM
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You mentioned that the old engine is tired. Did it work ok up until it got tired? If so, maybe all it needs is a fresh engine, and some new belts to get it back into fighting condition. That predator engine will be giving you a power upgrade anyway from the original. Hopefully, you won't have too many problems dropping it on there, although several members have had to reinvent the chute crank geometry (if yours has a crank) to get around the valve cover on the OHV engines.

Without seeing your current hardware, keep in mind that belts and pulleys need to be the right size for each other. It you go to a wider groove pulley for the engine, you will also need to upsize the pulley on the drive end as well. Finding compatible pulleys with correct hole diameter, keyways, locking setscrews etc. might be a challenge. If you change pulleys, you will also have to figure out new belt sizes with a little trial and error as well.

Not that it cannot be done, just depends how much effort you want to put into the project. If you stick with the originals, assuming the old pulleys fit the new engine, it may be an easier exercise.

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post #8 of 10 Old 01-05-2016, 04:08 PM
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Your best bet is to try an re-use the pulley that came with it if all possible. That machine likely had a Chinko engine in it I bet. So it will probably be pretty close to a natural fit. Might have to sleeve the crank but that beats trying to locate new belts and pulleys...... measure everything good before you commit. i found that out the hard way. Easier to know where you need it to land before you commit.



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post #9 of 10 Old 01-05-2016, 10:49 PM
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I did one with a 1/4in drive belt. A 3/8 belt fit on the friction dive plate pulley. If you could measure and post the shaft diameter of the current engine on the unit. The Predator's have 3/4in shafts, so if your current engine has a 3/4in shaft. You could possibly re-use the pulleys and the same size belts.




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post #10 of 10 Old 01-05-2016, 11:18 PM
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If you go to a 3/8 wide or 3L belt on the drive just make sure the brake will not eat up the belt. You want to make sure the belt sits deep enough in the v groove.

The other issue you may encounter is that the length of the shaft on the Predator is not long enough to work with a standard width pulley and align with with the auger lower pulley. I hope this is not an issue for you but if it is there are work arounds.
If you have more questions post some pictures as that can help explain your situation much easier. It is likely that there is more than one person here that has upgraded your exact machine.

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