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Discussion Starter #1
Hey all,

First of all the engine is a Tecumseh Snow King LH195SP-67514D. I've searched and found that this is a 5.5HP engine. The engine is completely screwed up. I had a repair guy take a look and said it would be better off to replace the engine or buy a new blower.

I have a few questions: (1) Can I swap in a bigger/more powerful motor with minimal work, and if so which engines would be compatible? I know some have said the Harbor Freight Grey Hound 6.5HP was a good, cheap buy; or (2) should I just replace the motor with a new one, same exact model? I know this is the easier path, but I would like more power! :D

It really comes down to difficulty in the installation of a different engine. I'm quite handy, having done most maintenance on our cars. So I do know a thing or two about tools and such.

Most important thing is the shaft size right? Well here is a what I found:
MTD Style Crankshaft #37842 - 7/8” Dia. x 2-13/16” with Keyway


Thank you ahead of time for any advice!
 

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I have had good luck with Greyhounds. I replaced a 3.5 on a toro with the 6.5 and an 8 on an Ariens with an 11. Have not really had a chance to use the 11, but the 6.5 worked great last winter.

The 6.5 is a 3/4 shaft, so you will need new pulleys or a spacer.

The biggest thing is making sure your blower isn't using 2 separate shafts on the engine. A lot of the MTD designs use the crankshaft for the blower and the camshaft for the drive wheels. This causes the drive wheels to be spinning backwards and at half speed. One other thing to look out for is the Greyhounds are OHV and will stick out a few inches further on the left side from the operator position than the old LH models. This can cause a problem with the chute crank.

The 6.5 was the same exact mounting and shaft as the 3.5 it replaced so that was simple.





 

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Discussion Starter #3
Thanks for the reply Shryp. Is there a way to tell if my blower is using 2 separate shafts without removing the engine (which would have to wait until I get home)?
 

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Discussion Starter #4
Well, there are two separate control levers, one to turn the auger and one to power the wheels. So is it safe to assume it's running on 2 different shafts?
 

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No, all new blowers have 2 levers. That has nothing to do with the shafts. You will have to remove the belt cover. It should be easy and only 2 screws. While you are at it, measure the crank to make sure it is 7/8" as your picture indicates.

 

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Discussion Starter #6
Thanks again. I found a picture of the original engine online. Excuse me if I sound like I know nothing, but here it is and it appears as though there is only one shaft coming out of the engine:



I can attach a diagram from the manual if that will help you help me out. Thanks again!
 

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If that is indeed your engine you will find it pretty easy to swap over. You will only have 2 potential problems. Shaft diameter and chute crank.

Did some quick looking online and it apears yours is a 7/8" diameter shaft. You will either need to buy 2 new pulleys for it, or get a sleeve to adapt 3/4 to 7/8.
 

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Discussion Starter #8 (Edited)
Thanks a lot Shryp! I will go into this with confidence. Oh, and I've seen your Youtube video before I decided to find a forum to ask my question. I am impressed!

I think I will follow your lead with the chute crank!

And could you suggest a place where I can find the sleeve or pulleys? Would the local Autozone or Parts America stock anything like this?
 

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maybe i'm overly cautious but............
before i would lay some bread down for a new engine...
get a second opinion about how screwed the current block is......
can prob get a 7or 8 horse to step that up, smallenginewarehouse has tecumseh replacements in 7&8 horse
 

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Discussion Starter #11
Thanks for your concern! I do trust the mechanic as he lives in my neighborhood and we've known each other for 5 or so years. Plus he used to be the small engine mechanic at our local Sears before he retired.

I do want to step up to a larger engine, but the price is the concern. The Harbor Freight engines are pretty cheap especially the 6.5HP for $129. If possible, I'd like to keep the cost of a new engine under $200. Still looking at the moment!
 

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Don't forget the 20% off coupon when you buy it.
 

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Discussion Starter #13
Thanks for all the help Shryp. I just got the pulleys in the mail today and just finished the install of the new engine! It was pretty straight forward. Loud as **** too! I do have some adjusting to do.

The wheels will engage once I press the lever for drive but they quit turning. I am thinking maybe this has to do with the drive belt. It isn't as tight as I want it to be. The stock belt is 3/8" wide and 28 and 5/8" long. The new pulleys I have are 3" in diameter. It works perfectly with the auger as that belt is nice and tight.

Any ideas, suggestions as to what I can do?
 

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You could try a shorter belt or adjust the idler to tighten that one. Check the friction disc too.

That engine should be quieter than the Tecumseh.
 

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Did you check craigslist.
I find engines on there all the time, some on complete units.
I then rebuild them before I install them, take me about 8 hours from start to finish installed.
I got a 12hp I/C ($20) for my snapper that had a regular 12hp on it that was shot now I have a good snapper RER mower for cheap and is mint also with a bagger system.
 

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You can't use both coupons, but I think the 20% off would have been a bit cheaper. The prices fluctuate a lot. I used a $109.99 coupon for mine too I think.
 

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Discussion Starter #19
Ok, an update after yesterday's Noreaster. Thanks to all for the tips, advice, and such. When I got the blower back from the mechanic, it was missing all the pulleys and such. I left the parts there thinking I wouldn't need them for the new engine transplant. The drive belt was loose and there was no way to tighten it, which was why I asked. Shryp, good call on the idle pulley! I had to go through the box of the disassembled parts and found it.

I added the idle pulley and was able to add tension to the drive belt and voila! The thing ran like a champ. I couldn't reuse the belt cover as the way the idle pulley mounts to the new engine gets in the way. I'm gonna cut out part of the belt cover and fiberglass it and shape it to fit over the pulleys.

Anyhow, pictures are due and I will try to snap up some photos by this weekend of the machine.

Oh, and another note. This engine is actually pretty quiet. I haven't had the old Tecumseh running since it was busted. I compared the noise from my neighbor's smaller, older blower and we agreed his was louder. So far the Greyhound 6.5 is a great engine.

One more thing, do you guys use the air filter or have you removed it? I've read that the air filter gets iced up so it would be best to discard it, but wouldn't all sorts of dirt and stuff get into the engine?
 

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I left my filter in place and always said I would remove it if I had problems. I never had any problems. I also have an 11HP Greyhound mounted on a big Ariens that still has the air filter. Snow blowers don't have air filters because the snow keeps the dust and dirt away. Also there are no leaves and other stuff blowing around in the winter time. Just remember what happened last time you cut your grass and compare it to last time you used a snowblower. Completely different elements.
 
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