Reply
 
Thread Tools Search this Thread
 
Old 20 February 2009, 05:31   #11
JSP
Member
 
Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
http://rib.net/forum/showthread.php?...ght=Ocean+ribs
__________________

__________________
JSP is offline   Reply With Quote
Old 20 February 2009, 06:39   #12
Member
 
Country: UK - England
Town: Lymington
Boat name: rib-it
Make: Scopion
Length: 8m +
Engine: Suzuki 250
Join Date: Dec 2004
Posts: 100
Is the max engine output on a boat linked to the CE markings on the plate.

In other words the boat is only issued with a CE plate if the engine dose not exceed X horsepower you may find that by changing the engine the boat may not be CE compliant.

But it may be as simple as weight but if it was then you would have a max weight on the CE plate not max hp.
__________________

__________________
Rib-it.com

www.rib-it.com
simonnud is offline   Reply With Quote
Old 20 February 2009, 08:25   #13
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Quote:
Originally Posted by JSP View Post
There's lots of threads on the subject of moving to 4 stroke which more HP from a 2 stroke mate. Some of which you've joined in. I wanted to stick a 50/60 hp 4 stroke on a SR4 and was advised against it....
While I may have joined in a debate or two on 2 stroke v 4 stroke, I don't recall advising anyone that fitting a motor more powerful than recommended would be acceptable.
DHD (chilled )
__________________
Downhilldai is offline   Reply With Quote
Old 20 February 2009, 09:40   #14
JSP
Member
 
Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
Quote:
Originally Posted by Downhilldai View Post
While I may have joined in a debate or two on 2 stroke v 4 stroke, I don't recall advising anyone that fitting a motor more powerful than recommended would be acceptable.
DHD (chilled )
No I've never read that statement from you. Only advice to watch the extra weight on the transom.
__________________
JSP is offline   Reply With Quote
Old 20 February 2009, 10:14   #15
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
How old is the boat it'll be fitted on? I'm thinking it'd be a really bad idea to overpower a boat with a 4 stroke if the boat was built when 4 strokes weren't widely available.

I''m not saying overpowering is a good idea-but it'd be far worse to add weight the boat is likely not designed for plus overpowering it by 25%.

Personally, I wouldn't do it anyway.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 20 February 2009, 11:30   #16
Member
 
Country: Germany
Town: Stuttgart
Boat name: Boat
Make: Avon,Scorpio,535 She
Length: 5m +
Engine: Yam 75HP,Johnson 70
Join Date: Jan 2008
Posts: 133
Quote:
Originally Posted by ali_seton View Post
Hi all,

My 4m rib is rated to a 40hp. Ive got a 1990 40hp mariner 2 stroke engine, can i put a 2005 50hp johnson four stroke engine on the back?

Thanks
How many would you ask for the Mariner?
Is it a 6E9? Longleg?

Mike
__________________
mike-stgt is offline   Reply With Quote
Old 20 February 2009, 13:22   #17
Member
 
Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
Join Date: Jul 2006
Posts: 39
Quote:
Originally Posted by mike-stgt View Post
How many would you ask for the Mariner?
Is it a 6E9? Longleg?

Mike
im looking for around 1199 as it has new top engine mounts
__________________
ali_seton is offline   Reply With Quote
Old 20 February 2009, 13:23   #18
Member
 
Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
Join Date: Jul 2006
Posts: 39
Quote:
Originally Posted by Nos4r2 View Post
How old is the boat it'll be fitted on? I'm thinking it'd be a really bad idea to overpower a boat with a 4 stroke if the boat was built when 4 strokes weren't widely available.

I''m not saying overpowering is a good idea-but it'd be far worse to add weight the boat is likely not designed for plus overpowering it by 25%.

Personally, I wouldn't do it anyway.
the boat was built in 2002 or 2003
__________________
ali_seton is offline   Reply With Quote
Old 21 February 2009, 12:01   #19
Member
 
Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
Join Date: Jul 2006
Posts: 39
thanks for your help guys...

i looked at those links you sent me and made a few phone calls to dealers of ocean ribs and some people who make them. They say that the maximum rating is a 50hp but it is reccommended to a 40hp, so they said that the johnson would be fine.

Im still not 100% sure that i feel happy putting that engine on the back. ill do some more homework and make some more calls!

thanks everyone
__________________

__________________
ali_seton is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 -5. The time now is 19:20.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.