Craftsman II 5/23 536.884800 repowered: - Snowblower Forum : Snow Blower Forums
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post #1 of 26 Old 01-10-2018, 06:48 PM Thread Starter
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Craftsman II 5/23 536.884800 repowered:

I recently got a relatively low hours Craftsman II 5/23 with the "Trac-Drive" to use as a secondary machine. I decided to repower it with a larger 8HP engine from another similar Craftsman. I will post some pictures soon.

Overall the machine is in excellent condition. I did have to go through the entire track system as it was completely bound up but after freeing everything up and removing all the rust from sitting, it operates smoothly again. I'm impressed with the track drive on this unit. I've been using a wheeled unit with large snow tires on it and the tracks definitely feel more stable and easier to keep moving in one direction.

A few more mods I plan to do is a later model taller chute, I'm not a huge fan of the short chute they used on these machines. Hopefully I can find one that's metal. There seems to be a few on eBay. I also may add a cable to raise and lower the deflector. Has anyone done this?

It also seems like I need to overhaul the engine. The 8HP motor I received while running great, it burns oil and I'm afraid to take it apart and figure out why. If it's bad piston rings, I can live with that. I've rehoned cylinders and replaced rings before, but valve guides might be an issue. Are they replaceable on these engine blocks? I may also just look into a replacement block.

Overall, I'm very pleased with the machine. I was worried about the small 10" impeller size but it seems to do the job quite well with the larger engine on it.

Edit: Here are some pictures. Excuse the messy garage. Due for a huge spring cleaning.

The only information I can find on this block is a tag labeled SBH 6277.




Last edited by FlamingSpaghetti; 01-11-2018 at 09:25 PM.
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post #2 of 26 Old 01-10-2018, 07:38 PM
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Check if your engine is a single shaft or twin on the blower. Though there are a few, most 7-10 hp engines are single shaft.
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post #3 of 26 Old 01-10-2018, 08:05 PM Thread Starter
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Originally Posted by HCBPH View Post
Check if your engine is a single shaft or twin on the blower. Though there are a few, most 7-10 hp engines are single shaft.
The engine is definitely a twin shaft. The main crankshaft and then the camshaft for the track drive assembly. The 5HP and 8HP that I swapped around are both dual shaft. I have a very healthy 8HP on my 24" MTD machine but I would hate to pull a motor on a machine with absolutely nothing wrong with it, which is why I hope to find a donor block for the 8HP.
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post #4 of 26 Old 01-10-2018, 08:12 PM
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The front of the engine can be swapped out with a single shaft to make it a double so If you come across a good engine cheap you can turn it into the duel shaft.

Sno-Tek Modded, 15"X-Track tires (Now has same X-Track tires but 13"x4" for better fit), 254cc engine LED light and hand warmers.
Snapper 6/22 sold but not forgotten. Was my first.
Ariens ST1027LE workhorse and going strong.
New 2017 Ariens Deluxe completely rebuilt after losing a fight with a forklift.
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post #5 of 26 Old 01-10-2018, 08:54 PM Thread Starter
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The front of the engine can be swapped out with a single shaft to make it a double so If you come across a good engine cheap you can turn it into the duel shaft.
This is what I intend to do if needed, but my question is, if this engine is burning oil, do you think the crank and cam would have excess wear? I'm assuming that these blocks are all aluminum similar to Briggs so it's probably best to just replace the block/piston/rod with one in better condition. My biggest concern is putting a used rod on a different used crank.
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post #6 of 26 Old 01-10-2018, 09:16 PM
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There are still a LOT of oem new old stock parts for these engines, Do a ebay search and youll be surprised at how much there is out there.

Sno-Tek Modded, 15"X-Track tires (Now has same X-Track tires but 13"x4" for better fit), 254cc engine LED light and hand warmers.
Snapper 6/22 sold but not forgotten. Was my first.
Ariens ST1027LE workhorse and going strong.
New 2017 Ariens Deluxe completely rebuilt after losing a fight with a forklift.
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post #7 of 26 Old 01-10-2018, 09:23 PM Thread Starter
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Originally Posted by Dauntae View Post
There are still a LOT of oem new old stock parts for these engines, Do a ebay search and youll be surprised at how much there is out there.
I'm currently on the hunt for a 8HP block. I'm seeing a lot of 10HP blocks but not any NOS 8HP blocks. A couple of used ones but I don't like the way the bore looks on quite a few of them and the price they're asking for one with a scored bore is pretty high. Any recommendations? What are the differences between 8HP and 10HP blocks? I think it's a larger piston?
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post #8 of 26 Old 01-10-2018, 09:41 PM
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Not really sure on what the differences are, I know they have a 8hp a 8.5hp a 9hp and the 10 hp all using the same block, I have machines with all of the above atm with the 10hp on the shelf and it also has double pulleys. It's not the prettiest engine but runs well but have not had it on a machine to see how well it runs under load. Thinking about it I have machines with the 8 and 8.5 with double pulleys thinking about it. All of these engines would drop right on without mods as they all have the same mounting holes and shaft in same location.

Sno-Tek Modded, 15"X-Track tires (Now has same X-Track tires but 13"x4" for better fit), 254cc engine LED light and hand warmers.
Snapper 6/22 sold but not forgotten. Was my first.
Ariens ST1027LE workhorse and going strong.
New 2017 Ariens Deluxe completely rebuilt after losing a fight with a forklift.
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post #9 of 26 Old 01-11-2018, 04:23 AM Thread Starter
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Originally Posted by Dauntae View Post
Not really sure on what the differences are, I know they have a 8hp a 8.5hp a 9hp and the 10 hp all using the same block, I have machines with all of the above atm with the 10hp on the shelf and it also has double pulleys. It's not the prettiest engine but runs well but have not had it on a machine to see how well it runs under load. Thinking about it I have machines with the 8 and 8.5 with double pulleys thinking about it. All of these engines would drop right on without mods as they all have the same mounting holes and shaft in same location.
Do you have any spare engines you would part with? I don't want to invest money in a block I won't be able to use if that's the case and I can't find a cure conclusive information on the differences between the 8, 8.5, 9 and 10 horsepower blocks.
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post #10 of 26 Old 01-11-2018, 08:44 AM
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Only one not on a machine is the 10hp, the rest are on good machines including my tiller, where are you located?

Sno-Tek Modded, 15"X-Track tires (Now has same X-Track tires but 13"x4" for better fit), 254cc engine LED light and hand warmers.
Snapper 6/22 sold but not forgotten. Was my first.
Ariens ST1027LE workhorse and going strong.
New 2017 Ariens Deluxe completely rebuilt after losing a fight with a forklift.
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