Doc Sprocket
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Not sure what it's worth but do some research. I would bet that it's worth a good buck to the right guy. Someone who has such a machine with a bad engine, and cannot buy a common 3/4" HZ to replace it with.
what type of shaft do i have?
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Yeah that's true I got it for 100 was that bad?
klicky96
New member
I wouldn't sell it. You can mount a clutch on there if you find a nut for that shaft and if its long enough. You can sleeve the shaft. Have a key on the sleeve and so when you tighten the bolt, it will keep the sleeve in place and you can use a clutch.
klicky96
New member
Well, first, measure the shaft. By the looks, its either 5/8" or 3/4". and if its a longer than normal shaft, then find the nut that goes on the end. For the most part, you might not even need the sleeve if you find a clutch that has a set key you can tighten. Just throw the clutch on, tighten the set screw on the clutch and your good. I did it, and some people may look down at this idea, but I seriously had no problem. I used a really old belt driven tiller engine. I had to cut the shaft and rethread it, but it worked. I slid a clutch on the shaft, tightened down the set screw, put the nut on, cranked as much as I could, and I never had a problem until I tried getting the clutch off 2 years later. It was a challenge haha but yeah, you can use this engine if you want.
Its a 5/8 and i tried an old pulley type thing... tightened up the set screw and looked fine.. but don't most clutches have a key? And how would i tighten it cuz it doesn't have a threaded hole.. thanks for your help you've been the most helpful...
Shaft was 2 2/8 long
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klicky96
New member
You can tap the hole with a tap and die set. Very easy to do. and you can buy a keyless clutch. But, if you really want to, you could buy a 3/4" bore clutch, push a sleeve through it, drill out the hole where the set screw is in the sleeve and there you go. All you need is a sleeve with a 1/16" wall. Also, if you really don't car about the engine, you could always just get an old clutch with a key and set screw, drill out the key, tap a small hole into the shaft at the part where the setscrew would go onto the shaft, and make like a simple hole for the set screw. This will keep the clutch from sliding off of the shaft and will keep it still on the shaft. The hole should not by no bigger than the set screw diameter though to keep the strength of the shaft. And do not drill all the way through the shaft, 1/8"-1/4" would be far enough in.
anderkart
Moderator
I found a 5/8" bore (11 or 12-tooth) clutch with dual set-screws, at the top of the page
here:--> http://www.heeters.com/kartclutches.shtml
I called Heeters and learned this clutch model has an overall depth of 2-1/4", so the length of your output shaft might be fine. With your external threads, I'd instal this clutch inboard with its drive gear facing towards the engine, that way its bushing would hopefully be riding against a smooth shaft, not grinding away against those external threads.
You might get away with simply drilling two 1/8"-deep holes in your output shaft for this clutches dual set screws to lock into, but it would be much better if you cut (broached) a 3/16" wide X 3/32" deep keyway in your output shaft so you could use a key to keep the clutches hub from spinning on the shaft. Then you would not need to drill any holes in your output shaft, because the clutches set-screws would just be used to keep the clutch from sliding off like they were intended.
The left end of this pic shows what a keyway looks like:
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