Rope Cutters

[clyst]

Hi all ,

Having only a 6HP petrol aux engine is there any point in fitting a rope cutter?? Would the motor have enough UMPH !! cut anything other than string or would any rope / net it just stall it ?
Has anyone fitted one to such a small engine ? your comments/ advice would be appreciated.

Regards Terry

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[MIKE_MCKIE]

No idea re yours, but interested anyway. I have a long keeled boat witha 10hp Beta. My question is where do you put a rope cutter on such a boat and how much room do they take on the shaft, as there ain't exactly much to spare twixt deadwood & prop?
I guess that anything above a couple HP can cut rope, depends on the size/material etc. Lets face it even diddy little o/boards can take arms & legs off without much problem!!!
Look forward to the replies from the forum.
Rgds
Mike

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[jimi]

I would suspect it depends on what you wrap. I've got a Yanmar3GM 27hp fitted with the ambassador rope cutter. It took a serious effort for it to chew through something I wrapped (do'nt know what it was though) and suspect that if the engine had been less powerful it probably would have stalled the engine.

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[andy01842]

I would think a 6hp o/b would have enough power to shear its shear pin. If it has not got a shear pin it would probably have enough power to damage the drive. I don’t know just guessing, so a good ider!?
Andy

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[jimi]

I was working on the premise that its inboard as if its an outboard there's absolutely no point in having a ropecutter!

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[Spuddy]

My situation is similar ti mike_mckie's, although engine is smaller still - Yanmar 1GM.
I've been assuming that the long keel and attached rudder made it less likely that junk would be picked up.
Anyone's experience of prop cutters with smaller engines in long keelers and the fitting thereof would be appreciated.
regards

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[Richard_Blake]

What's the engine? The main factor might not be horsepower, but the weight of what's turning. An old-fashioned job with long stroke and heavy flywheel might chew through more than a modern, efficient lightweight engine. Unstoppability factor?

Richard

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[clyst]

Richard,
Its a good ol' Stuart Turner !!! I know ! I know ! Should have got rid of it years ago but its a beauty (Honest!!) Boats a long keel similar to a folk boat but have been anchored by the prop due to floating lines more than once and stalled the engine!!

Terry

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[Richard_Blake]

Of course it's a beauty! Who was it who said something about beauty defying reason? If we were going to be rational about everything we probably wouldn't have boats - especially old ones!
Hope someone else can really help...

Richard

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[pvb]

Space on the shaft...

If there isn't enough space on the shaft, it's easy to fit a spacer between gearbox and shaft, so that the prop moves backwards a bit and more shaft space is created for the ropecutter. <A target="_blank" HREF=http://www.ropestripper.com/>Ambassador's website</A> has lots of info on spacers, measuring, etc.

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[kds]

Re: Space on the shaft...

I have a similar problem.
I checked the web site - thanks.
It is clear from the dimensions that I am too short of space to fit such a cutter. I am concerned that my prop shaft is minimal at 20 mm. for a 13 hp. engine and so I certainly do not want to use spacers to push the prop. out further from the bearing than is absolutely necessary.
I have not heard any good things about the simple disc cutter, which is slim enough for me to consider fitting. Is it really just a waste of time (and money) ? Are there no supporters ? There was discussion some time ago - but I can't trace it.
The boat is a traditional long keeler with prop in cut out ahead of and within rudder.

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