The Fishing Website : Discussion Forums : Prop Question.... https://www.fishing.net.nz/forum/ Sat, 04 Jul 2026 18:40:03 +0000 Thu, 08 Jul 2010 14:19:05 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.01 360 https://www.fishing.net.nz/forum/RSS_post_feed.asp?TID=54137 <![CDATA[The Fishing Website : Discussion Forums]]> https://www.fishing.net.nz/forum/forum_images/web_wiz_forums.png https://www.fishing.net.nz/forum/ <![CDATA[Prop Question.... : Just an observation for fun: Normally...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=789276&title=prop-question#789276 Author: Unclejake
Subject: 54137
Posted: 08 Jul 2010 at 2:19pm

Just an observation for fun: Normally we see about 20 knots @ 4,700rpm but on Sunday we had nine PoB (yes, 9) and at 4,700 rpm we were doing 13/14 knots.
 
I hadn't realised just how much these props can slip under load
]]> Thu, 08 Jul 2010 14:19:05 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=789276&title=prop-question#789276 <![CDATA[Prop Question.... : Unclejake, my boat is quite sensitive...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773317&title=prop-question#773317 Author: Seadoc
Subject: 54137
Posted: 02 Jun 2010 at 10:41am

Unclejake, my boat is quite sensitive to the trim, I can easily pick up 200rpm when trimmed correctly. I always trim my boat to the conditions - in when getting on to the plane, then trim out until I just start getting a little ventilation and then a bit in again. If i am about to make a fairly tight turn I trim it in again. Being a centre console it also keeps the crew dry if the nose is up!

I will report back once I have the SS prop
]]> Wed, 02 Jun 2010 10:41:17 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773317&title=prop-question#773317 <![CDATA[Prop Question.... : If you don&#039;t mind publishing...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773231&title=prop-question#773231 Author: Unclejake
Subject: 54137
Posted: 02 Jun 2010 at 12:30am

If you don't mind publishing your findings wrt trim and revs I would be very interested. We do not pick up revs with the motor trimed out and perhaps that means our motor is too low?
 
We have our motor on a pod so the maths is a bit different
]]> Wed, 02 Jun 2010 00:30:09 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773231&title=prop-question#773231 <![CDATA[Prop Question.... : Cheers Seadoc... saw your...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773198&title=prop-question#773198 Author: tas-tackle
Subject: 54137
Posted: 01 Jun 2010 at 10:24pm

Cheers Seadoc...  saw your boat in Mangonui when you were up...
I need to go look see at where I have the engine mounted and check the hull to Cav plate... 
Next time I'm out, I will find a bit of ripple water, trim it out on the fuel computer and see what sort of revs and speed it pulls at WOT and check the Cav plate to see how its running out the back...
Be interesting to see what, if any difference the change in prop does to your boat Seadoc ...  ]]> Tue, 01 Jun 2010 22:24:02 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773198&title=prop-question#773198 <![CDATA[Prop Question.... : Thanks Seadoc. Let us know whenever...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773018&title=prop-question#773018 Author: Unclejake
Subject: 54137
Posted: 01 Jun 2010 at 6:55pm

Thanks Seadoc. Let us know whenever you decide what to do.]]> Tue, 01 Jun 2010 18:55:52 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=773018&title=prop-question#773018 <![CDATA[Prop Question.... : I will let you know when I get...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772872&title=prop-question#772872 Author: Seadoc
Subject: 54137
Posted: 01 Jun 2010 at 1:21pm

I will let you know when I get the new one, Unclejake! Mine is not as shiny as yours though!]]> Tue, 01 Jun 2010 13:21:16 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772872&title=prop-question#772872 <![CDATA[Prop Question.... : BTW - the 50hpMercury props fit...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772804&title=prop-question#772804 Author: Unclejake
Subject: 54137
Posted: 01 Jun 2010 at 11:46am

BTW - the 50hp Mercury props fit the Yamaha F60
 
Seadoc - I would still be interested in your alloy F60 13P if you are not keeping it. I have a new F60 14P I don't want if it is any interest to anyone else. The best result would be a straight swap for a 13P
 
 
]]> Tue, 01 Jun 2010 11:46:55 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772804&title=prop-question#772804 <![CDATA[Prop Question.... : &#034;Fisher&#034;, I have the...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772745&title=prop-question#772745 Author: Seadoc
Subject: 54137
Posted: 01 Jun 2010 at 9:09am

"Fisher", I have the same engine on a 4.7 Surtees and have a 13P prop, giving me about 30knots and 5800rpm at WOT with 2 POB. I have done quite a bit of asking around and reading up and have ordered a 13P Solas SS prop. I would definitely not lower the engine if I occasionally get "cavitation" (it is actually "ventilation") but rather go for a SS prop of the same pitch which should stop the ventilation problem and give you a little bit added performance due to the increased stiffness and thinner blades of the SS. I recently lifted my engine 1 hole and the increase in performance both out of the hole and top speed was noticeable. I will give some feedback once I have fitted the SS prop. They do not have any 13P in stock because the Thundercat boys cleaned them out!]]> Tue, 01 Jun 2010 09:09:41 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772745&title=prop-question#772745 <![CDATA[Prop Question.... : If the cav plate is bellow catchelot...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772578&title=prop-question#772578 Author: Outboard Performance
Subject: 54137
Posted: 31 May 2010 at 8:48pm

If the cav plate is bellow catchelot it will be a poor performer. As unclejake said it will loose top end speed, the fuel economy will be poor. the steering will be heavier. And it can also do damage to the engine because it can kick up too much salt spray and then the motor can draw it in. If you have a really salty powerhead and no transducer on the boat it can be a cause of that.]]> Mon, 31 May 2010 20:48:34 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772578&title=prop-question#772578 <![CDATA[Prop Question.... : ^ In my verylimited experience...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772458&title=prop-question#772458 Author: Unclejake
Subject: 54137
Posted: 31 May 2010 at 6:24pm

^ In my very limited experience the top speed performance will be reduced and the boat may porpoise]]> Mon, 31 May 2010 18:24:04 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=54137&PID=772458&title=prop-question#772458