Switching to a Three Blade Prop - SailNet Community
LinkBack Thread Tools
post #1 of 7 Old 03-28-2009 Thread Starter
Junior Member
Join Date: Nov 2008
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Switching to a Three Blade Prop

I have decided to switch to a three blade fixed prop from a two blade fixed prop for better performance while motoring. My Pacific Seacraft manual recomends a 17 x 10 three blade prop and I believe it is a right (not left) prop.

My questions:

1. Has anyone used a different prop (fixed), diameter or pitch, from the one PSC recommends?

2. Is it a right hand prop? I just want to be sure.

3. Other than MI Wheel, does anyone have recomendations of prop manufactures? I AM ONLY INTERESTED IN FIXED PROPS.


John L.

s/v Redfish
1988 PSC 34 #95
Redfish is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 7 Old 03-29-2009
ASA and PSIA Instructor
Join Date: Apr 2000
Posts: 3,830
Thanks: 13
Thanked 37 Times in 37 Posts
Rep Power: 18
You might want to look into the rationale for any performance improvement from a three blade versus a two blade, assuming both are properly sized. If a two blade fits in your setup, simplying switching to a three will not have any particular benefit other than reducing your boat cash stadh.

Certified...in several regards...
sailingfool is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 03-29-2009
Senior Member
Join Date: Jan 2007
Location: The house is in Kingsport, TN. Boats are on Watauga Lake and in New Bern, NC
Posts: 398
Thanks: 4
Thanked 51 Times in 46 Posts
Rep Power: 11
My spare prop is marked AUSTRA 17R. My Yamnar Operation Manual in the specifications says, "Direction of rotation, Propeller shaft (Ahead), Clockwise viewed from the stern".

Bill Murdoch
1988 PSC 34
wsmurdoch is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 03-30-2009
Senior Member
lsbrodsky's Avatar
Join Date: Jul 2000
Location: New Bern, NC
Posts: 111
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 17
I agree with Sailingfool. I ran a two blade on Asylum the whole time I owned her and compared results with folks with 3 blade props. I got all of the performance I needed from 2 blades. It seems that there would have been marginal improvement in performance under power in reverse, but that was never a big issue. With a two blade the boat would drive to hull speed and power through any weather. If you felt you needed a folding prop I could understand, although i was always a proponent of fixed blades and no moving parts.
lsbrodsky is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 03-30-2009
Join Date: Jul 2007
Posts: 40
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 0
When we purchased our PSC 34 a couple of years ago, it was equipped with a 3 blade Maxprop and we had a spare 17 x 10 RH 3 blade fixed prop. The Maxprop was set to 17 x 10 and we were not able to get the proper RPM's from our Yanmar, and we had a problem with overheating.
Last spring we reset the Maxprop to an 8 inch pitch and the RPM's are now good and no more overheating.
I can't tell you how the fixed 3 blade 17 x 10 prop will work for you, but the Maxprop set to 17 x 10 was too much pitch.
Steve S.
Pegasus34 is offline  
Quote Quick Reply Share with Facebook
post #6 of 7 Old 03-30-2009
Junior Member
Join Date: Feb 2008
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Steve, I don't have enough posts to send you a PM. Would you be interested in selling your old fixed 3 blade 17x10 prop? I am in desperate need of one.

tedwright is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 03-31-2009
Senior Member
Join Date: Oct 2001
Posts: 192
Thanks: 0
Thanked 9 Times in 8 Posts
Rep Power: 16
When I repowered NiftyNickers (Beta 37 1/2 hp) I also switched to a 3 blade Sailor Prop from Campbell.Its a bit strange looking shape wise but it does put the power into pushing the boat and doesnt affect sailing at all.I know that it delivers more thrust than the 2 blade by the way the boat blasts thru headseas and she sails as fast as ever.
Good luck,
Dianne and Chuck Burke S/V NiftyNickers
niftynickers is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
3 blade prop question. baboon Gear & Maintenance 12 11-30-2008 09:37 PM
2 Blade vs 3 Blade prop PBzeer Gear & Maintenance 23 01-02-2007 09:43 PM
Three Blade Prop KenD Gear & Maintenance 4 10-21-2003 06:39 PM
Choosing the Right Propeller Sue & Larry Gear and Maintenance Articles 0 02-04-2003 07:00 PM
three blade prop KenD General Discussion (sailing related) 8 06-18-2002 02:23 PM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome