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For a tension system you could add some slotted holes somewhere so you will be able to make the distance between centers greater, will have to add a mechanical stop to ensure the tension does not loosen. Not sure if it would work for your setup, but the mudbuddy uses a system like that.
 
The holes that go to the PTO side of the block are slotted and then I believe that there is another set on the lower end, the holes in the belt housing are not slotted on the lower set, then there is an adjustment bolt with a jam nut to adjust the tension, This video shows pretty good detail
http://www.mudbuddy.com/Service%20Belt%20Tension.html
 
Discussion starter · #46 ·
That's a good idea but I don't really think that it will work for me without some major reengineering of what I already have. Mud buddy runs a single belt and actually adjusts the built housing down away from the motor to tension it from the look of it. I'm also running more than one belt so it would actually only tension one of them anyways
 
Depending on the room inside your case, look at the belt tensioner on a top fuel car. That is what I had on mine until I decided to just use shims and shim the motor up.
 
Im wondering the same thing anyupdate?

Im starting my surface drive build and dont plain on needing a battery for the pull start 14hp kohler i got, Anyone know if there is a way to put a clutch on the pulley? Looked into centrifugal and electric but im dumb and dont think the centrifugal will stand up and thought and electrical clutch would need a battery o function.

Any help?
 
I am mounting a Noram centrifugal clutch, 1600 series, on my 17 HP 483CC motors on a long tail. I use a 4" B profile for a BX belt and a 4" drive pulley and a 6 " driven pulley for a 1.5 / 1 ratio. I have it set to engage at 950 RPM. I can start it with this and comply with the coast guard regs. But it is low enough to allow it to put around for deeks and such without feathering it and burning it up.

Mark F. Cheney utahmarshmotors.com
 
No, they are not chain driven. The web consensuses seems to me to be that chain systems can't take the shock loading when a prop hits something hard. I am using Gates BX belts. I make a serious effort to "keep it simple". That is one of the reasons for the larger pullies, so that I can use a $7.50 belt instead of a $100.00 belt. They tend to slip rather than break when a chain would break. I think that is a good argument against the cog or toothed belt as well.

Mark F. Cheney
 
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