How to Replace a Frayed Trailer Winch Strap and Service the Ratchet

My winch strap is frayed and the ratchet slips — how do I replace the strap and fix the winch?

A frayed strap and a slipping ratchet are two separate issues that usually share one root cause: a winch that has never been cleaned or greased and is now worn. The strap is a wear item — replace it on a schedule, not after it fails — because webbing that lets go while loading can drop the boat or whip back violently. The slip is almost always a worn or dirt-packed pawl/ratchet gear (or a stripped gear set), not operator error. One critical point up front: the winch strap is a loading tool, not a tow tie-down. The boat must always be held for towing by a separate bow safety chain (or cable) plus rear transom tie-downs — never by the winch strap alone.

ℹ️ Reference only: For general reference only. This guide does not guarantee any result — every home is different. Verify against your local building codes and a licensed professional before acting, especially for electrical, gas, plumbing, structural, or roof work.

💵 Strap alone: $15-$40. Pawl/spring repair kit: $10-$25. Full replacement winch (manual): $40-$150; larger or two-speed/electric winches $150-$500+. A trailer shop doing the work runs about $75-$150 in labor on top of parts. ⏱ 15-30 minutes to swap just the strap; 45-90 minutes to also disassemble, service, and regrease the ratchet. ● Use caution

Safety: The hazards here are mechanical and load-related, not engine hazards: a boat rolling back off the bunks, a strap or cable snapping back under tension, or crushed fingers in the gears. Always chock both trailer wheels and keep the boat secured by a separate chain or tie-downs before releasing or trusting the winch. Never stand directly behind the strap's line of pull while cranking, and never rely on the winch strap alone to hold the boat during towing — the law and ABYC/trailering practice call for an independent bow safety chain plus stern tie-downs. Wear gloves when handling worn webbing or wire cable, and watch your footing on wet, sloped ramp surfaces.

Common causes

UV, salt, and abrasion have degraded the webbing — sun-baked, fuzzy, or cut fibers lose most of their rated strength long before the strap looks fully failed. (most common)
Quick check:
A worn, bent, or dirt/corrosion-packed pawl (the spring-loaded dog) can't fully seat in the ratchet gear teeth, so the drum back-spins under load. (common)
Quick check:
A weak or broken pawl spring lets the pawl bounce out of the teeth instead of holding. (common)
Quick check:
Worn or rounded ratchet/gear teeth (or a stripped main gear set) from years of dry, ungreased operation — the gears skip under load. (less common)
Quick check:
The strap was wound on backwards or the hook/end stitching has pulled, so it never spools or holds correctly. (rare)
Quick check:

How to fix it

Stage the boat safely first: park on level ground, chock both trailer wheels, and either leave the boat resting on the bunks/rollers with the bow against the bow stop, or secure it with a separate strap or chain so nothing can roll back when you release tension. Never work on a winch with the boat's full weight hanging on the strap you're about to remove.
Relieve tension and remove the old strap: pull the release/freewheel, unwind the strap, and disconnect it at the drum. Most straps anchor with a slot-and-pin or a bolt through the drum, or a sewn loop over a pin — note exactly how yours attaches and which way it feeds (it should come off the top or bottom of the drum to match the winch geometry).
Pick the correct replacement strap: match width (usually 2 in.) and length (typically 15–20 ft), and choose a strap rated for your boat. As a margin, the winch's rated capacity should be roughly equal to or greater than the loaded boat-plus-gear weight (many trailerers size up to about 1.5x for steep ramps); the strap's working load must meet or exceed the winch rating. Use marine-grade polyester webbing with a properly rated, latching hook (a safety latch keeps the bow eye from jumping off). Replace any strap that is faded, fuzzed, stiff, cut, or has heat-glazed or broken stitching — do not 'get one more season' out of it.
If your boat is heavy or you launch on steep ramps, consider switching to a galvanized aircraft-grade winch cable or a synthetic winch line instead of webbing, but only if the winch drum and gear are rated for it. Do not mix a strap-rated winch with a cable load. Note that wire cable develops broken-strand 'fish hooks' as it wears and snaps back harder than webbing — wear gloves and inspect it often.
Disassemble the winch to service the ratchet: remove the handle, then the drum/gear cover or snap ring so you can see the gears, the pawl, and the pawl spring. Take a photo before you pull anything so reassembly order is clear, and keep your face clear — the pawl spring is under tension and can flick parts loose.
Clean and inspect: wipe out old grease, salt, and grit. Inspect the pawl tip and the ratchet/gear teeth for rounding, chips, or flat spots, and check that the pawl spring still snaps the pawl firmly into the teeth. Any rounded teeth, a cracked pawl, or a tired spring means replace those parts — most winch makers (Fulton, Dutton-Lainson) sell pawl/spring repair kits. If the main gear teeth are stripped, replace the whole winch; it's not worth rebuilding.
Regrease and reassemble: pack the gears and pawl pivot with a marine-rated, water-resistant grease (marine trailer/wheel-bearing grease). Reinstall the pawl, spring, gears, cover, and handle in the original order. Work the handle and confirm the pawl clicks crisply into every tooth and holds firmly when you stop cranking — no slip, no skip.
Attach the new strap to the drum exactly as the old one came off, wind it on under light tension so it spools flat and even (no twists, no overlap bunching), and connect the hook to the bow eye with the latch closed.
Load-test before you trust it: crank the boat snug against the bow stop, then add the towing backup — a separate bow safety chain (or cable) to the trailer plus transom tie-down straps at the stern — so the winch strap is never the only thing holding the boat. Confirm the ratchet holds with the release engaged, then check again after the first short tow and re-snug.
Set a replacement habit: inspect the strap every trip and plan to replace webbing roughly every 2–3 seasons (sooner in strong sun or saltwater), and re-grease the winch at least annually.

DIY or call a pro?

Solidly DIY for any competent owner — replacing the strap is a 10-minute job and a pawl/spring kit plus regrease is straightforward with hand tools. Call a pro (or just buy a new winch) if the main gear teeth are stripped, the winch is seized, or you're stepping up to a heavier boat and aren't sure the winch and frame are rated for the load.

Tools & parts

Marine-grade polyester winch strap, correct width/length/rating (2 in. typical) with latching hook
Optional: galvanized aircraft-grade winch cable or rated synthetic line (only if winch is rated for it)
Winch pawl/spring repair kit matched to your winch brand (e.g., Fulton, Dutton-Lainson)
Marine/trailer wheel-bearing grease (water-resistant)
Socket/wrench set and screwdrivers
Snap-ring pliers (if your winch uses a retaining ring)
Wheel chocks
Bow safety chain (or cable) and transom tie-down straps for towing
Work gloves (handling frayed webbing or wire-cable 'fish hooks')
Shop rags and a wire brush for cleaning old grease and corrosion

Keep a record of every fix you make — what broke, what it cost, how you solved it.

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Based on: BoatUS / BoatUS Foundation (trailering and trailer maintenance guidance); NMMA (National Marine Manufacturers Association); ABYC (American Boat & Yacht Council) trailer and equipment best practices; Fulton / Dutton-Lainson winch owner and service documentation; USCG / USCG Auxiliary boating safety resources

General marine-maintenance guidance, not a substitute for a qualified marine technician or surveyor. Boats and conditions vary; for fuel, electrical, fire, or structural issues — or anything safety-critical — consult a professional. Always follow your engine and equipment manuals.