Cleaning Prop. & Replace w/ Folder or Feathering Prop. - SailNet Community
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post #1 of 18 Old 09-01-2013 Thread Starter
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Cleaning Prop. & Replace w/ Folder or Feathering Prop.

Hello All,

I'm asking advice about the Best & Fastest way to clean my Prop. & Shaft. I'm loaded up with barnacles and the like. I was going to blast it with a non abrasive media. I think these are some of my choices -- Walnut Shells, Soda, Plastic and a couple other that I can't remember. My prop. is a 3 blade bronze type prop. .

I have been reading about -- folders and feathering props. I was shocked to see a price tag of $ 4 k for feathering props.

I was wondering about backing up and how good they are ?

What is a Good Name Brand ____________and Approx.. Price $ _ _ _ . _ _ .

I read that some folks like their 3 or 2 blade max. name brand prop. .

I was wondering about how you determine the pitch of the blades if prop. numbers are not visible.

I forgot my HP rating on the Perkins 4 cyl., I think it's around 42 or 48 HP and 1 in. prop. shaft.

I have read here and from the previous owner..that he cruised around 1400 to 1700 RPM (most of the time). So, do you plan on installing a pop. with a pitch that's slightly... more or less pitch at 1400 to 1700 RPM ? The max engine RPM is 3200 or 3600 RPM on the Perkins.

Thank You,

Avery
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post #2 of 18 Old 09-01-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

A prop shop can measure the pitch of your prop blades.

The Max-prop is the best known and seems to be the standard for a reliable feathering prop. They are over $2000.

The Kiwi Prop is a less expensive alternative that many people seem to like. They are about half the price of the Max Prop and have a simpler mechanism but composite (plastic) blades.

Gori seems to make a well regarded folding prop.

There are lot of less expensive folding props.

It sounds like you are over propped if you are cruising at half of the engine RPMs. A prop shop would be able to help you figure out the right prop to use for your boat.

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post #3 of 18 Old 09-01-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

MaxProp will advise you as to the setting for their prop if you give them the info; boat, trans & engine, even if you buy a used one.
I've used both feathering and folding and would never use folding one if I could get a feathering one. The gear driven feathering always works unlike a folding prop which opens only by centrifugal force and can become fouled to the point that it won't open properly.
I like our MaxProp, it functions as it should. It's nice not having to have a shaft brake or listen to it spin the for days on end at sea. Some people I know do not have prop walk with a MaxProp, but I still have plenty, not that I mind.
Muriatic acid can be used to clean bronze props and ss shafts, if allowed where you are, but it very dangerous to work with, so you need to be extremely careful.

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post #4 of 18 Old 09-01-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

PYI will sell you a fully reconditioned 2 blade Classic for $1200-1400 depending on the size. Give them a call and ask.
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post #5 of 18 Old 09-01-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

You can buy a new one for about that price:
Max Prop Two Blade

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post #6 of 18 Old 09-01-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

What i did not see mentioned here is your reason for going all fancy on a feather or folding prop. Seriously unless you are a competitive racer your wasting your money. A simpple 250 bronze 2 blade propp will push you just fine and the drag is very minimal. Folding and feathering are for the racers. That being said its your boat and your money.
If you decide to save the money then just dive down or haul out the boat and use a chisel. Make sure the prop is not eaten with electrolysis (pink coloration, brittle and breaks or chips easy) and just ppound and scrape off the barnacles and your good to go for a month or so. Higer a diver for monthly cleanings or do it yourswlf.
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post #7 of 18 Old 09-02-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

Quote:
Originally Posted by Harborless View Post
What i did not see mentioned here is your reason for going all fancy on a feather or folding prop. Seriously unless you are a competitive racer your wasting your money.
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post #8 of 18 Old 09-02-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

One thing i like about kiwi feathering prop is i can adjust the pitch and thee prop is not expensive.
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post #9 of 18 Old 09-02-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

Quote:
Originally Posted by Harborless View Post
What i did not see mentioned here is your reason for going all fancy on a feather or folding prop. Seriously unless you are a competitive racer your wasting your money. A simpple 250 bronze 2 blade propp will push you just fine and the drag is very minimal. Folding and feathering are for the racers. That being said its your boat and your money.
If you decide to save the money then just dive down or haul out the boat and use a chisel. Make sure the prop is not eaten with electrolysis (pink coloration, brittle and breaks or chips easy) and just ppound and scrape off the barnacles and your good to go for a month or so. Higer a diver for monthly cleanings or do it yourswlf.
Whoa there fella. I'm not a racer; Neptune himself couldn't get me to race my boat!
Have you ever been on a boat with the prop freewheeling while sailing? It sucks! Shaft brakes or feathering/folding props are the only solutions I know if you have a hydraulic trany, and they aren't cheap either. I guess you could hang a line over the side until it wraps around the prop; that'd really save money.
I'd pay whatever the cost not to listen to my prop freewheel for a 10 mile sail or a thousand mile sail.
So please don't imply I'm a racer; I might get defensive.
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Last edited by capta; 09-02-2013 at 03:37 AM.
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post #10 of 18 Old 09-02-2013
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Re: Cleaning Prop. & Replace w/ Folder or Feathering Prop.

I plan to replace the fixed three blade on my new boat with Maxprop three. Ten years of Maxprop experience with my prior vessel made me a believer, despite the cost.

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Last edited by sailingfool; 09-02-2013 at 10:44 AM.
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