Boatmad.com


Reply
 
Thread Tools Display Modes
 
Old 13-07-2009, 08:09 PM   #41
Registered User
 
Renegade's Avatar
 
Country: UK
Location: london
Occupation: Powerboat Skipper
Interests: Boats , bikes!
Boat name: Renegade
Boat make: GPV-RENEGADE
Engines: 150 HO etec
Cruising area: Thames, south coast, anywhere!

Join Date: Dec 2008
Location: london
Posts: 2,330
Quote:
Originally Posted by roofer View Post
I'd get someone who knows what they are doing to check your setup. Sounds like something is very wrong, I've owned 2 P20's and they are a great handling boat even my mate with a standard 200 mariner on a very heavy P20 gets over 70 mph and he can't drive {sorry Paul }
I agree. set up is everything.
And also the p20 seem to be the ones that have got the speeds up at windermere/coniston, so the figures speak for themselves.

Steve H with his and the Rendalls withe their's in OCR 2.0 ltr.

I'm sure you'll get is sorted.
__________________

__________________
Im re branding pepper spray as Arsehole Repellant.im going to make a fortune.
Renegade is offline   Reply With Quote
Old 13-07-2009, 09:02 PM   #42
Registered User
 

Join Date: May 2005
Posts: 34
we used to run a 200 merc on a heavey 21 cyclone n see 70 no probs 22 chopper that had bin workd for a xr2 on a 20 phantom still have the numbers from prop solutions workins if u nead them ,engine was stock n no lift,there is no nead to get complicated
__________________

gash is offline   Reply With Quote
Old 14-07-2009, 09:23 AM   #43
Registered User
 
Country: UK. Essex
Location: Mayland
Occupation: Train Driver
Boat name: Un-named as yet
Boat make: Phantom 21
Engines: yam 225
Cruising area: Thames estuary Black water/crouch

Join Date: Apr 2009
Location: Mayland
Posts: 373
Quote:
Originally Posted by NIC SURRY View Post
Hi I've just tried using a high five at higher speed and it was scary,up to 50 mph OK but got very twitchy similar to chine walk but this was on dead flat like glass water and I thought we were on for good top speed but it felt far to unstable to push it any faster ,normally the boat feels more stable with the engine down but with the high five it was better with it up ie point level with bottom,my best result so far has been a 21p OFFSHORE 4 blade (Discontinued)prop,it gave 50 mph in choppy water at 5,000 revs boat felt very stable and with 2000 revs left should give a good top end
I experienced this too when i trimmed the engine out on calm water, got to about 50 and boat felt like it was on ice stern sliding from left to right. Maybe trimmed out to far?
Carl_B is offline   Reply With Quote
Old 14-07-2009, 05:35 PM   #44
Registered User
 

Join Date: Jun 2009
Posts: 670
dont get these problems in my 7 tonn marshan
baj666 is offline   Reply With Quote
Old 15-07-2009, 09:42 AM   #45
Registered User
 
Country: UK. Essex
Location: Mayland
Occupation: Train Driver
Boat name: Un-named as yet
Boat make: Phantom 21
Engines: yam 225
Cruising area: Thames estuary Black water/crouch

Join Date: Apr 2009
Location: Mayland
Posts: 373
Quote:
Originally Posted by baj666 View Post
dont get these problems in my 7 tonn marshan
Is that minus the weight of the fuel tank?
Carl_B is offline   Reply With Quote
Old 22-07-2009, 09:23 AM   #46
Registered User
 
Country: UK. Essex
Location: Mayland
Occupation: Train Driver
Boat name: Un-named as yet
Boat make: Phantom 21
Engines: yam 225
Cruising area: Thames estuary Black water/crouch

Join Date: Apr 2009
Location: Mayland
Posts: 373
Ok 3 blade prop with p25 on and 5 blade with p21 off. Engine is raised up 2 notches. I didnt want to go up too high as cavitation plate would of been much higher than the bottom of the hull and i didnt want to risk venting too much. Now awaiting the weekend to try it.
__________________

Carl_B is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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


Powered by vBadvanced CMPS v3.2.3

All times are GMT +1. The time now is 09:23 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
×