Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-12-2010, 10:29   #31
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,787
Quote:
Originally Posted by svrodeorm View Post
I am amased at how many seems to use steel scrapers on their soft bronze (?) props.

would never do that. A piece of wood yes. Or plastic - as a credit card or ice scraper or something along those lines...
I've never thought of bronze as "soft" I've scraped quite a few and never gouged any of them with a putty knife. It would seem to me that if this fear of soft props eroding from putty knives and sand paper was real, we'd also see props rapidly eroding from the silt in water. ICW pushboats spend their entire lives in, for lack of a better description, really fine lapping compound. They don't polish their props off at any real rate without hitting bottom.
__________________

__________________
Sailmonkey is offline   Reply With Quote
Old 02-12-2010, 11:11   #32
Registered User

Join Date: Mar 2008
Location: Houston TX
Boat: Pacific Seacraft 25 "Turtle"
Posts: 364
Images: 35
I have an old bayonette with a lanyard so I don't drop it. The proper edge on a bayonette is dull so as to do the most damage to whoever you might be sticking with it so it won't scratch the bronze. If you square off end on it it works even better for getting into those narrow spots. I have since seen a couple of dive(abalone) knives that have the square ends so I guess I'm not the first bright one to do this..........m
__________________

__________________
I must go down to the sea again.........
cantxsailor is offline   Reply With Quote
Old 02-12-2010, 20:49   #33
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,594
Quote:
Originally Posted by svrodeorm View Post
I am amased at how many seems to use steel scrapers on their soft bronze (?) props.


Quote:
Originally Posted by svrodeorm View Post
would never do that. A piece of wood yes. Or plastic - as a credit card or ice scraper or something along those lines...
Clearly you have never tried to clean a dirty prop.
__________________
fstbttms is offline   Reply With Quote
Old 02-12-2010, 22:45   #34
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,388
Scraped an awful lot of barnacles on bronze props for years with various metal implements and have yet to gouge or damage the prop. Barely even leaves light scratches.

Knocking barnacles off with a plastic scraper? Must be a different species than the ones that live in Florida.
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 03-12-2010, 05:58   #35
Moderator
 
Hudson Force's Avatar

Cruisers Forum Supporter

Join Date: Nov 2008
Location: Lived aboard & cruised for 45 years,- now on a chair in my walk-in closet.
Boat: Morgan OI 413 1973 - Aythya
Posts: 7,894
Images: 1
Quote:
Originally Posted by cantxsailor View Post
I have an old bayonette with a lanyard so I don't drop it...........
cantxsailor is probably wise enough to have his lanyard tied with a loose loop from which he can escape. Myself, I need to constantly guard against doing something stupid! I free dive to clean my bottom and return to the surface with little reserve. I choose not to teather myself to my tools with lines that could become tangled in my work. My only exception has been my allen wrench for the zinc on a velcro tab. I guess I could use a velcro wrist band tied to a tool line. .......I think visions of the nightmare scenario have saved my butt more than once!
__________________
Take care and joy, Aythya crew
Hudson Force is offline   Reply With Quote
Old 03-12-2010, 06:11   #36
DWT
Registered User

Join Date: Mar 2007
Posts: 207
I bought a fancy windshield plastic scrapper a few years back thinking it would be "Prop friendly". It did NOT work on the prop and, being that I live in the Florida Keys... I'll never be useing it on my windshield either!

I have never nicked or scared my bronze prop useing a steel scrapper.
__________________
David
69Morgan30'
CarolAnn
DWT is offline   Reply With Quote
Old 03-12-2010, 06:45   #37
Registered User

Join Date: Feb 2009
Posts: 1,321
Under water a 10mm by 50mm by 300mm piece of Starboard from the King Plastic Corporation FL. The plastic is soft enough for the barnacles to cut into it, be stuck and be removed, the tool self sharpen, also ideal for painted water line and seaweeds and zincs. That job can be done once a fortnight sea life permitting. The admiral keeps an eye on crocs, sharks and sea wasp (box jellyfish, nasty stuff). Out off the water I soften the left over “calcium” on the auto prop with vinegar and use a scraper made of SS. By the way Starboard do float.
__________________
chala is offline   Reply With Quote
Old 03-12-2010, 07:54   #38
Registered User
 
JamuJoe's Avatar

Join Date: Feb 2008
Location: Durango, CO
Boat: Leopard 42 - JAMU
Posts: 190
Images: 13
Excellent tips for prop maintenance in this thread!
1. Heat-dried lanolin grease on a polished prop before launching.
2."10 in 1" paint scraper on a velcro wrist lanyard. (file down/round the sharp corners)
3. Gloves (I like the thin 'mechanics gloves').
4. Ear plugs against displaced barnacles.
5. Weight belt for neutral buoyancy. (I'll use my BCD with weight pockets and manual inflator).

Underwater, I've used a dull knife and never seriously scratched the bronze, followed by a 3M or 'scotchbrite' pad. If the growth isn't bad, I use a plastic paint scraper.

I wonder about the feasibility of a hard teflon coating on a bronze prop?
__________________
Safe Sailing,
JamuJoe - Durango, CO
S/V JAMU - Western Caribbean
JamuJoe is offline   Reply With Quote
Old 03-12-2010, 08:07   #39
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,594
Quote:
Originally Posted by JamuJoe View Post
4. Ear plugs against displaced barnacles.
Bad, bad, BAD idea! Never put anything in your ears while diving! You should wear a hood however, regardless of water temperature.
__________________
fstbttms is offline   Reply With Quote
Old 03-12-2010, 09:02   #40
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,388
Quote:
Originally Posted by fstbttms View Post
Bad, bad, BAD idea! Never put anything in your ears while diving! You should wear a hood however, regardless of water temperature.
Double that recommendation.
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 03-12-2010, 09:04   #41
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,388
Quote:
Originally Posted by CaptForce View Post
cantxsailor is probably wise enough to have his lanyard tied with a loose loop from which he can escape. Myself, I need to constantly guard against doing something stupid! I free dive to clean my bottom and return to the surface with little reserve. I choose not to teather myself to my tools with lines that could become tangled in my work. My only exception has been my allen wrench for the zinc on a velcro tab. I guess I could use a velcro wrist band tied to a tool line. .......I think visions of the nightmare scenario have saved my butt more than once!
Excellent comment. Better than a loop, even loops can jam, tie with a breakaway piece in the line like a very small nylon tie wrap. Small ones you can easily snap if you need to in a hurry. Velcro also good.
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 03-12-2010, 09:31   #42
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Here in Florida on the finger canals the water has very high nitrogen content because of yard fertilizer run off. I have to dive my props and sail drives almost every week. If I let it go for more than three weeks there's no way plastic would do a thing. The barnacles would laugh. I get my brushes SS and brass from Home Depot where the welders are sold.
I never really thought of the lanyard becoming an entanglement problem until now. A great comment I will take stock in from now on.
Tellie is offline   Reply With Quote
Old 03-12-2010, 11:20   #43
Registered User

Join Date: Mar 2008
Location: Houston TX
Boat: Pacific Seacraft 25 "Turtle"
Posts: 364
Images: 35
Since I float like a (fat blue) cork in my wet suit I hook my feet under the keel to hold myself in place and never have to put my head under the water. Barnacles in my ears? Never. Beans maybe but never barnacles. A good point about lanyards getting tangled though. I always try to make them short enough that my hand just gets in so there isn't much extra to tangle. I may try velcro or a bungie just in case...................m
__________________
I must go down to the sea again.........
cantxsailor is offline   Reply With Quote
Old 03-12-2010, 14:25   #44
Registered User
 
svrodeorm's Avatar

Join Date: Jul 2010
Location: Fr. Poynesia
Boat: Southern Cross 35' Cutter - FrPol & H-boat 26' - Sweden
Posts: 248
Send a message via Skype™ to svrodeorm
If paint scrapers and bayonets aren't sufficicient.... how about shooting them off with a gun

Apparently I haven't encounterned the 'panzar' barnacles you guys are talking about.... ro may bottom paint might be too good for them


anyway, do you paint antifouling on your props pr not??

I tried both, but can't really see much difference in the results.

If/when the zinc on the shaft is gone, the growth on the prop diminishes dramatically, but that's for known reasons.
__________________
svnanna.wordpress.com
Do it today-tomorrow it could be too late!
svrodeorm is offline   Reply With Quote
Old 03-12-2010, 17:16   #45
Registered User

Join Date: Oct 2010
Posts: 679
Quote:
Originally Posted by svrodeorm View Post
anyway, do you paint antifouling on your props pr not??
Consensus here is that there's no point - begins flying off from the moment you engage gear. I'd like to see a tank test on that though. But try the heated lanolin - unless your barnacles are from space, I think you'll be happy.
__________________

__________________
Wand is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Prop Zinc Is Gone and Now I Have White Spots on the Prop dubhouse Propellers & Drive Systems 21 01-12-2010 14:59
Best Tool for Cleaning the Prop? Fishman_Tx Propellers & Drive Systems 15 02-09-2009 20:34
Rainwater Collection Methods Nauti-Ness General Sailing Forum 7 26-07-2009 16:14
Cat recommendation - Construction Methods, longevity and price adampyfrom Multihull Sailboats 14 22-08-2008 03:08



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:17.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.