I am thinking of installing a Shaft Line Cutter, I had to be towed in from 15 miles out (No Wind), due to a Crabpot Line stalling out the engine (Wrapped around the Propeller).
Has anyone installed one of those cutters? If so, do they work and what brand is recommended?
I've thought about it, but not sure how effective the cutter will be after a few months of marine growth. The cutters are sharp, not sure I would want to try cleaning one in the water.
My boat came with a Spurs line cutter. I know it works-I have felt it cut lobster pot lines several times. Once in Maine while sailing I saw my speed drop to about 3 knots in high wind and saw a line trailing behind the boat, clearly dragging a pot. I nervously started the engine and threw it into gear immediately freeing me up and off we sailed. With hindsight I don't think I would have done it again and now travel with a wet suit, mask and cheap knife. My conscience bothers me as I cost the lobsterman big bucks for steering poorly. Of note, the fixed portion that attaches to the shaft strut I believe has screws designed to sheer off as a defense against shaft/engine damage if the line or other object cant be cut. I lost this part and had to replace it after every season. The last 2 years not travelling to Maine I haven't bothered reinstalling it. Marine growth never seemed to be a problem-very hard steel in constant motion.
While chopping the lines and hurting the watermen's income is not good, having your prop fouled and your crew & boat put at risk makes the choice a no-brainer for me.
I've got a "Shaft Shark". It is a 2 piece stainless circular blade that clamps onto the shaft behind the cutlass bearing and just before the prop hub. Imagine a serrated bread knife bent into a circle with the cutting edge facing out. No moving parts, and minimal drag. :thumb:
It can be professionally resharpened, although I've had mine for 4 years in the Chesapeake Bay and it's still really sharp. Crab pot lines don't stay on long if the shaft is spinning. The occasional barnacle is easily knocked off. A diver can install it in the water, although I put mine on during a routine haul-out. 2 allen bolts, some loctite (included) and 10 minutes is all you need, but wear heavy work gloves to protect your hands.
I agree with Analgesic: It is prudent to keep a mask, snorkel, and fins on board. Get a set of those "medic shears" with the plastic handles. If you do need to go under, tie the shears to a light line and then to your wrist. Easier to operate than a knife, and they cut through nearly everything.
Fair Winds,