1.125" PTO clutch

[thedaddycat]

Here's a pic of the double pulley PTO clutch I took off an old engine block that Rob-B identified as a Kohler. I intended to fit it up to the 14 hp Kohler in the 7114 when I got it together. I figured since they're both Kohlers it should be a straight up bolt on, no problems and then I can have my choice of PTO pulley sizes(and speeds indirectly), right???? Only one rub there, the shaft on that engine is 1" while the PTO is 1.125". I checked the Kohler 18 twin and the Briggs 16 twin on the garage floor, and the Briggs 10 single in the 3310, all of which are also 1" shafts. Can anyone tell me what kind of engine will bolt into a 7100 and uses a 1.125" shaft? The second pic is of the old block, out of a Ford judging by the blue paint. You can see where the PTO was.

[Dutch]

Kirk, I don't know for sure, but some of the KT-series and Magnums may have used a 1.125" shaft. It's also possible that Simplicity may have even made a running change on some of the K-series, or it may be that the higher hp engines had a 1.125" shaft. My OEM Command V-twin does have a 1.125" shaft.

[PatRarick]

I did an engine switch for a customer last summer from a 416 Allis to a 716. The 416 had a 1 1/8" crank. Had to have the mechanical front clutch from the 716 machined to fit the 1 1/8" shaft of the 416 engine. I believe Kohler engines from 10 horsepower and up were available with either 1" or 1 1/8" crankshafts, but I don't know what models or brands used the 1 1/8". As to using your electric clutch, I had the machine shop make a sleeve to use a 1 1/8" electric clutch on a 1" crankshaft. Can't recall the price, but it wasn't too bad. I had to use a 1/4" X 5/16" key, rather than the standard 1/4" key. The machine shop supplied the key when they did the job. Pat

[thedaddycat]

Is it possible that the old block is from a higher hp engine? Can anyone ID it, perhaps by looking at head bolt pattern, valve sizes, etc... I can take more pics or measurements if needed. Though there's almost nothing left of the old engine, maybe I could get another like it to put in the 7114. Dutch, after your comments about using the front PTO for the Sweepster I am trying to figure out the best way of doing that.... Who knows, maybe just using the center PTO and a long belt will work out best with that Cub hitch. BTW, I got my new brush sections today, all black poly.

[PatRarick]

Kirk, if you measure the bore, you can tell what it is (was?). K-241, 10hp, 3 1/4". K-301, 12hp, 3 3/8". K-321, 14hp, 3 1/2". K-341, 16hp, 3 3/4". Pat

[UCD]

I believe front PTO kit part# 1690356 came with a sleeve part# 1663743 to adapt it to the 1" shaft

[BLT]

Simplicity had a kit P/N 1690356 that would convert a manual front disconnect clutch from 1" to 1-1/8". You think something like that was available for the electric clutches?

[Dutch]

quote:

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Originally posted by thedaddycat
Who knows, maybe just using the center PTO and a long belt will work out best with that Cub hitch.

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From the looks of that Cub broom, you might be right. Do you have a single pulley hitch for a long belt snowthrower? It might be easiest to use that as a starting point and adapt the broom to fit that hitch. BTW - I looked at my broom since I said it had only one chain. I was wrong. It has 2. One from the angle gear drive to the hex shaft. The other from the hex shaft to the broom shaft.

[thedaddycat]

Dutch, is there a speed reduction on the "gear drive-to-hex shaft" chain? After looking at your pics I thought maybe using a spare BGB could do the trick but couldn't figure how to get speed down. That was one of the big draws for having two PTO pulleys, so I could use the smaller one for lower final drive speed.

[GregB]

The Kohler K361 OHV 18hp single cylinder on my 718H has a 1.125 dia shaft. Greg B

[thedaddycat]

I went out and checked it, the bore is 3.25" which makes it a 10 hp K-241.....

[PatRarick]

Though I can't see it clearly enough, that was my assumption, based on the apparent size of the valves. Pat

[greenmack]

I hate to be the barer of bad news ,but that could be an old SEARS SUBURAN engine. I had one a few years ago it was that same blue. It was a TECUMSEH 12HP.

[BLT]

Now that you mention it, it does appear to be a TEC block.

[PatRarick]

The engine is definately a Kohler. Notice the angled exhaust and the two "dips" in the front bearing cover to accommodate either a high or low mount starter. Pat