To select the right Muir windlass, match the model to your boat’s length overall and make sure the windlass’s maximum pulling capacity is at least three times the total weight of your ground tackle (anchor, chain, and rode). This guide walks through every Muir range — vertical, horizontal, drum, and capstan winches — with a complete model-by-model sizing chart by boat length.
Muir windlass ranges at a glance
| Series | Configuration | Boat length range (ft) | Example models |
|---|---|---|---|
| VR / VRC | Vertical | 16–83 | VR/VRC 600 to VR/VRC 4000 |
| VFF | Vertical | 16–52 | VFF600, VFF1050, VFF2200 |
| DW / DFF | Drum | 16–47 | DW08/DFF08 to DW15/DFF15 |
| H / HR / HFF | Horizontal | 16–80 | H600S, HR1600 Cougar, HR2500 Cheetah, HR3500 Jaguar, HR4200 Thor |
| VC / VM / VMC | Vertical capstan / mooring | 19–86 | VC 500 to VC 4000, VM/VMC 500 |
How do I size a Muir windlass for my boat?
Start with boat length overall, then check the load rule: the windlass’s maximum pulling capacity should be at least three times the total weight of the ground tackle. Size, displacement, and type of vessel, as well as your typical anchoring conditions, must all be considered — vessels with heavy displacement or high windage require larger windlasses for optimal performance. When two models overlap your boat’s length, the heavier or more wind-exposed boat should take the larger unit.
| Windlass Model | Boat Length Overall (ft) |
|---|---|
| VR/VRC 600 | 16-29 |
| VR/VRC 850 | 26-35 |
| VR/VRC 1000 | 32-42 |
| VR/VRC 1200 | 32-49 |
| VR/VRC 1250 | 32-42 |
| VR/VRC 2200 | 38-48 |
| VR/VRC 2500 | 45-64 |
| VR/VRC 3500 | 48-77 |
| VR/VRC 4000 | 58-83 |
| VFF600 | 16-29 |
| VFF1050 | 29-42 |
| VFF2200 | 39-52 |
| DW08 / DFF08 | 16-26 |
| DW10 / DFF10 | 26-34 |
| DW12 / DFF12 | 34-40 |
| DW15 / DFF15 | 40-47 |
| H600S | 16-26 |
| HFF600S | 16-26 |
| H900 | 20-37 |
| HR700 / HFF700 | 26-35 |
| HR1600 Cougar | 29-42 |
| HR2500 Cheetah | 42-55 |
| HR3500 Jaguar | 45-65 |
| HR4000 Thor | 58-77 |
| HR4200 Thor | 58-80 |
| VC 500 | 19-38 |
| VC 650 | 26-36 |
| VC 800 | 26-36 |
| VC 850 | 29-45 |
| VC 2000 | 36-67 |
| VC 2500 | 45-70 |
| VC 3500 | 51-86 |
| VC 4000 | 58-83 |
| VM/VMC 500 | 19-38 |
| VM/VMC 500 Hawser | 19-39 |
What is the difference between vertical and horizontal Muir windlasses?
A vertical windlass (Muir VR/VRC, VFF, and Storm SS/SSC models) mounts most of its motor and gearbox below deck, leaving a low, clean profile on the foredeck; the chain wraps the gypsy roughly 180 degrees, which gives excellent chain grip. A horizontal windlass (Muir H, HR, and HFF series, including the Cougar, Cheetah, Jaguar, and Thor models) keeps the whole unit above deck, which simplifies installation on boats with shallow chain lockers or cored decks where below-deck space is limited.
As the chart above shows, both layouts cover the full size spectrum — vertical models run from the VR/VRC 600 (16–29 ft boats) to the VR/VRC 4000 (58–83 ft), while horizontal models run from the H600S up to the HR4200 Thor for boats to 80 ft — so the choice usually comes down to your anchor locker depth and deck layout rather than boat size.
Should I choose a capstan or low-profile version?
Within the Muir Storm range, most models come two ways: a capstan version (SSC) with a smooth warping drum above the gypsy, and a low-profile version (SS) without it. The capstan drum lets you haul rope independently of the chain gypsy — useful for kedging, tensioning mooring lines, or lifting a stern anchor. The low-profile version sits closer to the deck, leaves less hardware to catch sheets and anchor rode, and suits foredecks where sail-handling space is at a premium. If you regularly handle warps at the bow, take the capstan; if the windlass will only ever lift the anchor, the low-profile unit is the cleaner installation.
What gypsy size, voltage, and motor power do I need?
The gypsy must match your chain exactly — both size and link type. Muir Storm windlasses are offered with gypsies for common chain specifications such as 1/4"HT, 5/16"HT, 3/8"HT, 7/16"HT, and 3/8"BBB. A gypsy cut for high-test (HT) chain will not run BBB chain of the same nominal size reliably, so always confirm your chain marking before ordering.
Motor voltage must match your boat’s house system: Storm models such as the SS2500 are available in both 12V and 24V versions. Motor power scales with the size of the windlass — the Storm 1250 models use a 1200W motor, while the larger Storm 2200 and 2500 models step up to 1500W.
Frequently asked questions
How powerful should my windlass be for my ground tackle?
The windlass’s maximum pulling capacity should be at least three times the total weight of your ground tackle — anchor plus chain plus rode. Undersized windlasses work hard, run hot, and wear out early.
Do I still need a chain stopper or snubber with a windlass?
Yes. All windlass sizing assumes a chain stopper, chain snubber, or mooring cleat carries the load while at anchor and when setting or breaking the anchor loose. A windlass is a hauling device, not a load-holding point.
Which Muir windlass fits a 40-foot boat?
Several models overlap 40 ft, including the VR/VRC 1200, VR/VRC 2200, VFF1050, DW12/DFF12, HR1600 Cougar, and VC 850. Choose the larger option if your boat is heavy-displacement or carries high windage.
Are Muir Storm windlasses available in 12V and 24V?
Yes. Models such as the Storm SS2500 are offered in both 12V and 24V versions, so you can match the windlass to your boat’s electrical system.
What is the difference between BBB and HT chain gypsies?
BBB and high-test (HT) chain have different link geometries, so each requires its own gypsy. Match the gypsy to your exact chain size and grade — for example 3/8"BBB versus 3/8"HT — or the chain will skip or jam.
Does boat displacement affect windlass sizing?
Yes. Boat length is only the starting point — vessels with heavy displacement or high windage put more load on the ground tackle and need a larger windlass than the length chart alone suggests.