Lewmar 40AST 2-Speed Aluminum Self-Tailing Winch
- Brand:
- Lewmar
- Part no:
- 49040055
Image: Fisheries Supply
Where to buy
Specifications
- Size
- 40
- Speeds
- 2
- Self-tailing
- Yes
- Gear ratio
- 1.9:1/5.8:1
The Lewmar 40AST is a two-speed aluminum self-tailing winch for line from 5/16 to 1/2 in. Power ratios are 13:1 in first gear and 40:1 in second. It has a 5-13/16 in base and weighs 10.8 lbs. The pawls are captive, the main gear shafts are stainless steel, and the winch can be stripped by hand for servicing.
Our take
Captive pawls and a winch that comes apart without leaving the boat make servicing the 40AST straightforward, and no tools are needed to hand strip it. Power runs 13:1 in first and 40:1 in second.
From our buying guide
A winch's size number sits close to its top power ratio, though not exactly, and first-gear ratios vary more between brands. Each maker publishes its own sizing chart, so use the chart from the maker you're buying.
Check before you buy:
- It fits your existing holes, since same-size winches from different makers need not share a bolt circle.
- The self-tailing jaws take your rope, since they have a range.
- You have the right bolts. Harken does not supply them, and the makers disagree about countersunk heads.
Photo: Egor Myznik on Unsplash

