Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-11-2013, 18:12   #1
Registered User

Join Date: Nov 2013
Location: Portland
Boat: Islander 28
Posts: 10
Islander 28 Refit (propellor)

Hey Cruisers,

I will spare you all 37 items on the project list. Picked up a 68 Islander 28 for a "song" and now the dance begins.

I have to be out of the yard by the end of February. Sorry about the long post, next on my list is the prop. They say I want a 12x8 spun by my Yanmar 2gf20. I think there is room for a 14" prop and the book I bought encourages bigger diameters. Opinions?

The "must do before launch" (she's on the hard in Olympia WA) includes:
rewire mast
new compression post
bottom job (done, back nearly recovered)
engine check
stuffing box
impellor
propellor
alignment
rewire hull

Thanks
__________________

__________________
Islander 28
Ellie Ru
bobtourtillott is offline   Reply With Quote
Old 05-11-2013, 19:56   #2
Registered User

Join Date: Jun 2008
Location: seattle
Boat: Devlin 48 Moon River,j/100 BJ
Posts: 586
Re: Islander 28 Refit (propellor)

propping a boat is a combination of art and science. The task is particularly difficult with sailboats because many people believe its ok and beneficial to over prop. The most correct way is described in one of the articles under Tony's tips at Seaboard marine or at boatdiesel.com. First the size of the prop has to be compatible with the room around it aperture or distance from hull too close will create problems. The proper pitch and blade surface is determined first by knowledgeable or computer guess work and then by sea trail. The prop should reach rated rpm+100 at WOT full loading 100%. If you don't know what all this means read the articles on props above.
__________________

__________________
eyschulman is offline   Reply With Quote
Old 05-11-2013, 20:31   #3
Registered User

Join Date: Oct 2013
Location: Puget Sound, WA
Boat: Beneteau Oceanis 40
Posts: 92
Re: Islander 28 Refit (propellor)

All I can say is that I LOVE my MaxProp! Furthermore, they are sold by a company in Everett so you could easily drive up and pick it up.
__________________
SVRapture40 is offline   Reply With Quote
Old 05-11-2013, 20:44   #4
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 6,385
Re: Islander 28 Refit (propellor)

Is there no internet Islander 28 group? They'd know the proper size.
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 05-11-2013, 21:53   #5
Registered User
 
Mike Vogdes's Avatar

Join Date: Jul 2010
Location: Jersey Shore
Boat: Watkins 29'
Posts: 212
Well I have a very similar boat, 29 Watkins, and my power is a 2 GM 20 Yanmar motor. I'm spinning a 14x14 2 blade RH prop and very happy with the performance and fuel economy if that helps.
__________________
~~~ ><(((((*> ~~~
Mike Vogdes is offline   Reply With Quote
Old 06-11-2013, 05:57   #6
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,579
Images: 240
Re: Islander 28 Refit (propellor)

Greetings and welcome aboard the CF, bobtourtillott.

Eric has an informative Islander 28 website ➥ http://www.boatdejour.com/islander-28-manuals/
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 06-11-2013, 06:25   #7
Registered User
 
Paul Kotzebue's Avatar

Join Date: Oct 2009
Posts: 15
Re: Islander 28 Refit (propellor)

Quote:
Originally Posted by eyschulman View Post
The task is particularly difficult with sailboats because many people believe its ok and beneficial to over prop. ... The prop should reach rated rpm+100 at WOT full loading 100%.
eyeschulman has it right. Good advice.
__________________
www.pkboatplans.com
Paul Kotzebue is offline   Reply With Quote
Old 06-11-2013, 08:45   #8
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
Re: Islander 28 Refit (propellor)

Quote:
Originally Posted by SVRapture40 View Post
All I can say is that I LOVE my MaxProp! Furthermore, they are sold by a company in Everett so you could easily drive up and pick it up.

Lynwood, actually.
__________________
fstbttms is offline   Reply With Quote
Old 06-11-2013, 08:50   #9
Registered User
 
WebWench's Avatar

Join Date: Aug 2010
Location: VA, USA
Boat: S2-9.2 CC & IP40
Posts: 285
Re: Islander 28 Refit (propellor)

As I always say....If you got it for a song.....now you have to hire the orchestra, rent the Concert Hall and pay for all the instruments!
Have Fun!....Boats are like that!
__________________
WebWench is offline   Reply With Quote
Old 06-11-2013, 09:22   #10
Registered User

Join Date: Oct 2013
Location: Puget Sound, WA
Boat: Beneteau Oceanis 40
Posts: 92
Re: Islander 28 Refit (propellor)

Quote:
Originally Posted by fstbttms View Post
Lynwood, actually.
Technically Mukilteo
__________________
SVRapture40 is offline   Reply With Quote
Old 06-11-2013, 09:31   #11
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
Re: Islander 28 Refit (propellor)

Quote:
Originally Posted by SVRapture40 View Post
Technically Mukilteo
PYI Inc.
12532 Beverly Park Rd.
Lynnwood, WA 98087-1524

-- PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D --
__________________
fstbttms is offline   Reply With Quote
Old 06-11-2013, 09:51   #12
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,359
Re: Islander 28 Refit (propellor)

You want 15% of the prop diameter clearance between the tip of the prop and the hull. So for a 12" prop about 1.75 inches. You probably wont be putting a Max Prop on as the prop will cost more than you likely paid for the boat! But definitely go for a 3 blade... Michigan Sailor or something like that. I would pitch it to max out at about 10% under max engine rpm... but if you find a prop that's close... try it.
What prop is on there?
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 06-11-2013, 10:07   #13
Registered User

Join Date: Oct 2013
Location: Puget Sound, WA
Boat: Beneteau Oceanis 40
Posts: 92
Re: Islander 28 Refit (propellor)

Quote:
Originally Posted by fstbttms View Post
PYI Inc.
12532 Beverly Park Rd.
Lynnwood, WA 98087-1524

-- PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D --
Yes, I know what their address is. I have been there many times. As I said, I have a Maxprop and I got my radar mount and auto pilot drive unit from them. Specific street addresses aside, they are physically closer to Everett and/or Mukilteo than Lynnwood by a long shot.

So for those that go by street addresses - they are in Lynnwood (not actually in the city limits, just served by the Lynnwood post office). For those that go by general physical location - they are not actually in any city, but are very close to the cities of Everett and Mukilteo.

That being said, I am most honored to give a plug for PYI. *Every* time I have contacted them for any reason I have gotten more help that I could have hope for. They are truly wonderful people. If they sell a product I need, I wouldn't buy it anywhere else. Furthermore, I have found that their products are nothing short of top notch.

Over and out..
__________________
SVRapture40 is offline   Reply With Quote
Old 06-11-2013, 11:09   #14
Registered User

Join Date: May 2012
Location: Western Wisconsin
Boat: O’Day Daysailer II, 17'
Posts: 572
Re: Islander 28 Refit (propellor)

What is the gear reduction for the 2gf20 transmission? There should be a plate on the side of the transmission. From what little I could find on the internet, the diameter for the propeller would be 13 inches and the pitch maybe 10, but that appeared to be a real guess. I also saw 14X14 which is considerably bigger. What is the clearance between the propeller tips and the bottom of the boat? It should be 15% of the diameter of the propeller, from the tips of the blades to the bottom of the boat. Be aware that the minimum distance might not be straight up from the propeller tip to the bottom of the boat. If you are good with numbers, simple formulas, and graphs, get Gave Gerr's book Propeller Handbook, a very good book.
__________________
westwinds is offline   Reply With Quote
Old 07-11-2013, 14:16   #15
Registered User

Join Date: Nov 2013
Location: Portland
Boat: Islander 28
Posts: 10
Re: Islander 28 Refit (propellor)

I haven't found an active one. If anyone else does, please let me know...
__________________

__________________
Islander 28
Ellie Ru
bobtourtillott is offline   Reply With Quote
Reply

Tags
refit, rope

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:43.


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.