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jsoluna

1971 Raider 10 Revival

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jsoluna

Brought the unit over to a property that I maintain for a friend of mine.  Figure he'd get a kick out of it, and he did!

 

Like the Tecumseh smoke haze? 🧐 Plans in the works for an engine swap with a Command CH13 single, keeping everything as original as possible.  No sheet metal movement or cutting.

VID_20250801_135652916_exported_78460.jpg

Edited by jsoluna
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wallfish

Nice. Looking forward to the progress on it.

That tractor looks to be garaged most of it's life so that paint should clean up but pics don't always tell the whole story either.

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jsoluna
2 hours ago, wallfish said:

Nice. Looking forward to the progress on it.

That tractor looks to be garaged most of it's life so that paint should clean up but pics don't always tell the whole story either.

You are correct.  Definitely not touching any of the sheetmetal wiith anything other than some mineral oil and a Scotch Brite pad.  Haven't even touched it with a pressure washer yet.

Edited by jsoluna
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SylvanLakeWH

:text-welcomeconfetti:

 

Nice find!!! :eusa-clap:

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ebinmaine

:text-welcomeconfetti:

 

 

Looking forward to seeing your progress! 

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Retired Wrencher

That’s good news keeping it running and moving. Looking forward to seeing that engine swap. Keep us in the loop.

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953 nut
On 8/1/2025 at 4:51 PM, jsoluna said:

Figure he'd get a kick out of it, and he did!

:WRS:

Just think of how happy he will be without the Tecumseh smoke haze.

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jsoluna

Mowed yesterday with it and put it under a good heavy load.  Amazing little machine but man, that poor Tecumseh is ready to go.

 

Got the donor engine fired up and test ran it.  Runs Amazon, seems to be very low hours.  Crankshaft height and diameter are different, crankshaft length is almost identical.  Going to start the mockup process and pull the Tecumseh soon.

 

I realized this unit has the 10-pinion LSD diff.  Probably not at all limited slip anymore, given that it has been run low on fluid for decades.  Are these 10 pinion units a reason for concern at all if not maintained?

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ebinmaine
6 minutes ago, jsoluna said:

Mowed yesterday with it and put it under a good heavy load.  Amazing little machine but man, that poor Tecumseh is ready to go.

 

Got the donor engine fired up and test ran it.  Runs Amazon, seems to be very low hours.  Crankshaft height and diameter are different, crankshaft length is almost identical.  Going to start the mockup process and pull the Tecumseh soon.

 

I realized this unit has the 10-pinion LSD diff.  Probably not at all limited slip anymore, given that it has been run low on fluid for decades.  Are these 10 pinion units a reason for concern at all if not maintained?

 

 

The actual limited slip piece is literally a metal ring that slides in between all the pinion gears.

It is of course a wear item.

My best suggestion I think would be to get a rare earth magnet and attach it to the bottom of the transmission near the drain plug.

Run. Flush. Repeat.

 

Hopefully that will get whatever metal filings are floating around in there, out.

 

 

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pfrederi

Techy engines have a raised mounting plate without that you may find your Kohler lines up better

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jsoluna
33 minutes ago, ebinmaine said:

 

 

The actual limited slip piece is literally a metal ring that slides in between all the pinion gears.

It is of course a wear item.

My best suggestion I think would be to get a rare earth magnet and attach it to the bottom of the transmission near the drain plug.

Run. Flush. Repeat.

 

Hopefully that will get whatever metal filings are floating around in there, out.

 

 

Currently doing a flush similar to what you suggest, using ATF.  The neodymium magnet is a good idea.  I'll chuck one of those on there.

Edited by jsoluna

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jsoluna
24 minutes ago, pfrederi said:

Techy engines have a raised mounting plate without that you may find your Kohler lines up better

I'll post with all the details of the swap, but yes the Tecumseh raised plate raises the Command a hair too high for the crankshaft centerline to remain the same, and also causes the valve cover to contact the hood.

 

I've determined that if I keep the crank centerline and fore-aft location the same, the Command will clear by about  1/4"  between the hood and the valve cover.  This will require a custom mounting plate, but no big deal.  There should be ample room to change the oil filter, there is clear access to the oil drains and the air filter assembly.  Need to get it fully mocked up to see how it interacts with the drive belt guide and battery tray area.

 

The crankshaft diameter difference (Command is 1.000" and the Tecumseh is 1.125") should be easily dealt with a custom crankshaft sleeve and key.

 

I'll get some pics and measurements as we move forward.  Excited to keep it as original as possible. I believe the original style control cables, electrical system (although we will rewire it because it is really pooched) fuel system, and muffler will all swap over to keep it as original as possible.  I've owned a lot of the single cylinder Commands, and they are a really fantastic little engine.

Edited by jsoluna

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pfrederi
29 minutes ago, jsoluna said:

I

 

 

The crankshaft diameter difference (Command is 1.000" and the Tecumseh is 1.125") should be easily dealt with a custom crankshaft sleeve and key.

 

 

  No problem.  WH used both 1 and 1-1/8 shaft electric PTOs.  Your rewound coil should fit the 1 "  pulley set 

 

I have 1"  pulleys if you want one.

IMG_1251.JPG

Edited by pfrederi
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jsoluna
23 minutes ago, pfrederi said:

  No problem.  WH used both 1 and 1-1/8 shaft electric PTOs.  Your rewound coil should fit the 1 "  pulley set 

 

I have 1"  pulleys if you want one.

IMG_1251.JPG

Thanks! 

 

Would need the drive pulley as well.  I've already ordered a crankshaft adapter sleeve and key, but if it doesn't work out an 1" pulley set would be great 

Edited by jsoluna

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