This is gonna make me sound like an idiot..

416 · Backside 180 Joined: 25 Jul 2008 Posts: 836 City: Toronto

k so i have a 9hp with 12 tooth centrifugal clutch, and 60 tooth sprocket. my spool diameter was originally 11" and it was fast but not fast enough. so without thinkign i went to home depot bought new discs and made it 5" thinking the smaller the faster. but then i realized it wouldnt suck enough rope up so what do i do guys?

mead_hall · Pop Shuvit Joined: 06 Apr 2007 Posts: 176 City: Orlando

Probably a bigger sprocket and try for an 8in inner diameter. Im running 4.5" inner diameter with a 68t sprocket and a tav with 12t.
Im sure that the tav is saving my ass here so dont go that small.

416 · Backside 180 Joined: 25 Jul 2008 Posts: 836 City: Toronto

alright so 8" you think is good? i have to get another sprocket welded so ill try 8" the buy the sprocket. thanks

mead_hall · Pop Shuvit Joined: 06 Apr 2007 Posts: 176 City: Orlando

I know knox sent me some numbers at one point. I remember hearing 12t/70t/8in for some reason. I have the numbers written down at work. I'll try and get them to yah.

Guy · Backside 180 Joined: 14 Jul 2006 Posts: 842 City: Orillia

mead_hall, I think thats for 6.5 HP motors. I have it on a 6.5 HP and its a little slow.

I smaller spool will be slower. You need a bigger sprocket or a bigger spool.

I would suggest getting bigger centrifugal clutch sprocket.

Moohaumed · Faceplant Joined: 11 Sep 2009 Posts: 39 City: Valdosta

I have a 12/60 right now, with a spool diameter of roughly 7", maybe a little more because I am using 5/16 braided polypro ski rope so it's really thick. Anyway before putting on the 60t I had a 72 on it. I am running a 6.5h engine and it was fast as hell, faster than you want to be pulled by a boat, even with the 72t, so it sounds to me like your problem might not be with your gearing or spool diameter. Hope this helps.

JonnyBravo · Posted: Oct 15, 2009 2:51 am Post subject:

I rekon the best ratio for a winch is 6:1 with a variable drum size (ie a spool that can be changed to either 6", 7"or 8")
For example having a 10/60 sproket, or as i use, a 12/72.
It usually sits in that butter zone for torque/speed. Also with a variable spool, if you have too much speed but not enough torque (or vice versa) you can always drop or increase the drum width.
If any of this makes sense

mead_hall · Pop Shuvit Joined: 06 Apr 2007 Posts: 176 City: Orlando

Im running 12/68/4.5in