Catalina - Capri - 25s International Assocaition Logo(2006)  
Assn Members Area · Join
h.jpg Home.
a.jpg Association Forum
s.jpg Ships Store
c.jpg Cruising
r.jpg Racing
t.jpg Technical Tips
g.jpg Photo Gallery - New
o.jpg Boat Search - Updated
m.jpg Manuals & Brochures
3rdrpt.jpg Swap Meet
l.jpg Links
f.jpg Officer Flag Line & Staff
b.jpg Bylaws & Constitution
 
1.jpg Members Area
1.jpg Join the Association
 
Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
 
Association Forum
Association Forum
Home | Profile | Register | Active Topics | Forum Users | Search | FAQ
Username:
 Password:
Save Password
Forgot your Password?

 All Forums
 Catalina/Capri 25/250 Sailor's Forums
 Catalina 250 Specific Forum
 Power Thruster for Sailboat Outboards		  New Topic  Topic Locked
 Printer Friendly
Author Previous Topic Topic Next Topic  

cwstrang
1st Mate

Member Avatar

USA
78 Posts
Initially Posted - 08/24/2010 :  06:41:41  Show Profile
All:
Good morning from St. Helens!
I was going through the Catalina Owners.com web site and saw this for outboards. Has anyone had any experience with them?

Improve your sailboat outboard's thrust and save on fuel too!

That is not an empty claim. The PowerThruster will increase your outboard's acceleration by as much as 22% while saving at least 30% on fuel! Sailors report that the PowerThruster greatly improves their outboard's power and handling, especially important when maneuvering in tight spaces.

How confident are we about the performance of the PowerThruster? So confident the product comes with a 100% satisfaction guarantee.



Craig
Edited by - on

Stinkpotter
Master Marine Consultant

Members Avatar

Djibouti
9074 Posts
Response Posted - 08/24/2010 :  08:00:18  Show Profile
You'd better be satisfied because you will have drilled four holes in your outboard's lower unit.

It should have some positive effect, like "tunnel drives" on power boats. But if there were no downside, I have to suspect the outboard manufacturers would've already done it.
Edited by - on
Go to Top of Page

islander
Master Marine Consultant

Members Avatar

USA
4017 Posts
Response Posted - 08/24/2010 :  08:22:27  Show Profile
Well if you have a $100 to spare, Try it and let us know but I'm with Dave thinking that the engine manufacturers in there quest for more fuel efficient engines would have these on there engines already. I also would think that it would increase the chances of getting some debris caught between the prop and that thing rather than hitting the prop and bouncing away.
Edited by - on
Go to Top of Page

superbob
Navigator

Members Avatar

USA
200 Posts
Response Posted - 08/25/2010 :  15:46:54  Show Profile  Visit superbob's Homepage
What's interesting is that there's no research, at least that can be found on Power Thrusters web site, that documents increased performance and fuel savings.
Edited by - on
Go to Top of Page

Stinkpotter
Master Marine Consultant

Members Avatar

Djibouti
9074 Posts
Response Posted - 08/25/2010 :  19:41:53  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by superbob</i>
<br />What's interesting is that there's no research, at least that can be found on Power Thrusters web site, that documents increased performance and fuel savings.<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">I'd submit that the basic principle has been proven in many ways. A number of inboard powerboats use half-cylindrical "tunnels" for efficiency, and many tugs use full cylinders around props for the same reason--to focus the "spray" of water off the prop into directed thrust. At low boat speeds, a propeller throws water in a big outward circle as well as in the intended direction, a little bit like a paddle wheel. That's what causes sideways "prop walk" (pushing the stern to starboard in forward and pulling it to port in reverse) from throttle bursts at low speeds.

But is it a good idea for recreational boaters to have these appendages around their props--possibly subject to dents or things being jammed in them? I suspect each manufacturer has weighed the pluses and minuses and decided against them.

(See--sometimes a $+!nkp*++er can be useful! )
Edited by - Stinkpotter on 08/25/2010 19:46:38
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Topic Locked
 Printer Friendly
Jump To:
Association Forum © since 1999 Catalina Capri 25s International Association Go To Top Of Page
Powered By: Snitz Forums 2000 Version 3.4.06
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.