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Originally Posted by sailingfool
I can't speak to how other manufacturer's come up with their model numbers, but you can find general info about Lewmars
including the following FAQ:
How is the size/number system worked out?
size refers to the power ratio i.e. a Size 40 winch
has a 40.2 : 1 power ratio. This means if you put 25kg/55lb of effort on the handle, the pull generated will be approximately 1005kg/2211lbs.
Like sailingfool says, the # is a ref. to the power ratio. That being said, I can't find anything on a Lewmar
#10. You may need to measure the bolt pattern and upgrade to new winches
that have the same pattern.
OR, take the old ones out, ebay them to help fund new, fill in the old bolt holes, and start anew (good time to get two speed self tailing winches
with a slightly larger power ratio for more mechanical advantage).
OR, call Lewmar
and ask them about rebuild kits for a #10, rebuild them for about $50 each (or less considering they are single speeds), and go sailing.
You may not need to rebuild at all, a little winch grease goes a long way to make those puppies hum. If the drums surface is worn down you can have that fixed too.
Dictated, but not read.