Reply
 
Thread Tools Search this Thread
 
Old 19 October 2020, 03:16   #1
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Repowering a Solent 6.9

Hello all..

New to forum, just posted in the "hello" section.

I am looking to get some advice from the extensive experience in the community.

My current boat has a 150hp Yam VMAX 2stroke. While the engine is in great condition and has been well serviced, I am keen to repower this winter. My main drivers for this are (in no order):
- Better fuel efficiency (I will use year round, and would like to do some longer trips)
- The confidence of manufacturers warranty
- More power, lower rpm at higher cruising speeds
- Git rid of the noise and smell of 2 stroke!

The manufacturers plate states the boat can take up to 168 Kw but mentions nothing of weight. Does anyone know what weight these boats are rated for? I have tried searching the web with no success.

And then it comes down to what Engine and what horsepower. Taking weight out of the equation for now, I would like to aim for 200hp on the back if possible.

Does anyone have any thoughts or suggestions on what would be a good set up for this boat?

Thanks in advance
Nick.
__________________

__________________
Wight is offline   Reply With Quote
Old 19 October 2020, 04:42   #2
Member
 
neil.mccrirrick's Avatar
 
Country: UK - England
Town: Oldham
Boat name: Miss Isle
Make: Solent 6.9
Length: 6m +
Engine: 225 optimax
Join Date: Jan 2008
Posts: 1,118
If it helps I have the same boat and have a 225hp optimax on the back
__________________

__________________
I was born not knowing and have had only a little time to change that here and there.
neil.mccrirrick is offline   Reply With Quote
Old 19 October 2020, 04:47   #3
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 1,996
RIBase
I think you'd be fine with a 200hp.
Aim to keep the weight as low as possible.

You could ask Lee fairweather at Fairweather Marine in Fareham - he built it.
__________________
Searider is offline   Reply With Quote
Old 19 October 2020, 05:05   #4
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Quote:
Originally Posted by neil.mccrirrick View Post
If it helps I have the same boat and have a 225hp optimax on the back
Thanks Neil....I bet that flys!!

So from what I can tell that is about 225kg. Which is similar weight to the new 4cyl 200hp four strokes from Suzuki and Yamaha I think. Thats good news!

Also, how big is the fuel tank on these boats?

Thanks
__________________
Wight is offline   Reply With Quote
Old 19 October 2020, 05:07   #5
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Quote:
Originally Posted by Searider View Post
I think you'd be fine with a 200hp.
Aim to keep the weight as low as possible.

You could ask Lee fairweather at Fairweather Marine in Fareham - he built it.
Thanks Searider.. I did drop an e-mail to Fairweather marine to ask some questions, but never heard back. I'll see if there is a number and give them a call.
__________________
Wight is offline   Reply With Quote
Old 19 October 2020, 06:33   #6
Member
 
Country: UK - Wales
Town: Cardiff
Length: no boat
Join Date: Aug 2014
Posts: 1,564
Phone number on website https://www.fairweathermarine.co.uk/

Perhaps ask them For a repower quote
__________________
HDAV is offline   Reply With Quote
Old 19 October 2020, 06:37   #7
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Thanks HDAV.. spoke to them earlier. waiting for a call back once Lee is back in office.
__________________
Wight is offline   Reply With Quote
Old 19 October 2020, 12:34   #8
Member
 
Maximus's Avatar
 
Country: UK - England
Town: Wild West
Boat name: No Boat
Make: No Boat
Length: under 3m
Join Date: Jan 2008
Posts: 4,969
Send a message via AIM to Maximus
Quote:
Originally Posted by neil.mccrirrick View Post
If it helps I have the same boat and have a 225hp optimax on the back
Works pretty well it does too
__________________
A clever Man learns by his mistakes..
A Wise Man learns by other people's!

The Road to HELL ..is Paved with "Good inventions!"
Maximus is offline   Reply With Quote
Old 19 October 2020, 12:36   #9
Member
 
neil.mccrirrick's Avatar
 
Country: UK - England
Town: Oldham
Boat name: Miss Isle
Make: Solent 6.9
Length: 6m +
Engine: 225 optimax
Join Date: Jan 2008
Posts: 1,118
Lol cheers matt 160 litre tank
__________________
I was born not knowing and have had only a little time to change that here and there.
neil.mccrirrick is offline   Reply With Quote
Old 20 October 2020, 02:03   #10
Member
 
butty's Avatar
 
Country: UK - England
Town: southampton
Make: Island RIBS / custom
Length: 7m +
Engine: inboard diesel
Join Date: Jul 2003
Posts: 293
Wight
I would have a chat to Adam at AP marine in Cowes for some advise and help repowering, very helpful and knowledgeable guy who is always available... based in Cowes which should help you...
__________________
butty is offline   Reply With Quote
Old 20 October 2020, 02:49   #11
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Quote:
Originally Posted by butty View Post
Wight
I would have a chat to Adam at AP marine in Cowes for some advise and help repowering, very helpful and knowledgeable guy who is always available... based in Cowes which should help you...


Thanks Butty... I will him call today.
__________________
Wight is offline   Reply With Quote
Old 20 October 2020, 15:13   #12
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
It turns out that (like neil.mccrirrick) I have a 23inch transom on the RIB. Measured it tonight. So sounds like I am bang in the middle of L and XL. Have spoken to numerous marine engineers now, and have heard conflicting advice:

- Get an L and sit it as low in the saddle as possible (but that may still present issues)
- Get an XL and raise it up "a bit"
- Build up the transom
- Cut out some more of transom
- Get a jacking plate

So.... my head is spinning now, and would welcome any thoughts from those that have been a similar situation.

Cheers
__________________
Wight is offline   Reply With Quote
Old 20 October 2020, 15:48   #13
Member
 
neil.mccrirrick's Avatar
 
Country: UK - England
Town: Oldham
Boat name: Miss Isle
Make: Solent 6.9
Length: 6m +
Engine: 225 optimax
Join Date: Jan 2008
Posts: 1,118
I went L low as possible and all good. No cavitation if trimmed correctly or rooster tail. Cav plate rides skimming the water on the plane. Iím happy and would not go XL. But it was a worrying choice
__________________
I was born not knowing and have had only a little time to change that here and there.
neil.mccrirrick is offline   Reply With Quote
Old 20 October 2020, 16:14   #14
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Quote:
Originally Posted by neil.mccrirrick View Post
I went L low as possible and all good. No cavitation if trimmed correctly or rooster tail. Cav plate rides skimming the water on the plane. Iím happy and would not go XL. But it was a worrying choice


Thanks Neil... thatís what I was leaning towards, but lots of mixed messages! Given the size of the investment to repower it certainly makes me nervous!!
__________________
Wight is offline   Reply With Quote
Old 21 October 2020, 01:49   #15
Member
 
neil.mccrirrick's Avatar
 
Country: UK - England
Town: Oldham
Boat name: Miss Isle
Make: Solent 6.9
Length: 6m +
Engine: 225 optimax
Join Date: Jan 2008
Posts: 1,118
The angle of the transom reduces th length of the vertical I.e. The shaft leg. Plus modern outboards can ride higher than directly in the keel line where tradition says the cav plate is in line. All this helped me to a decision hope it helps you
__________________
I was born not knowing and have had only a little time to change that here and there.
neil.mccrirrick is offline   Reply With Quote
Old 21 October 2020, 02:48   #16
Member
 
Country: UK - England
Town: Isle of Wight
Boat name: Baloo
Make: Solent
Length: 6m +
Engine: 150hp VMAX
Join Date: Oct 2020
Posts: 13
Quote:
Originally Posted by neil.mccrirrick View Post
The angle of the transom reduces th length of the vertical I.e. The shaft leg. Plus modern outboards can ride higher than directly in the keel line where tradition says the cav plate is in line. All this helped me to a decision hope it helps you


Thanks Neil...

Iím currently leaning to either Suzuki 200hp AP or the latest Merc 200hp. Both appear light enough.

Been told the Suzuki in Long shaft is easy to get hold of, but a long shaft Merc is special order.

To a degree it will come down to what deal I could get, but still open to opinion on these two options.

What speed do people think I could achieve from a set up like this? I get around 42-44knots WOT from the 150 VMAX, but have been told going to 4cyl could blunt performance even though adding 50hp?!? 🧐
__________________

__________________
Wight 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




All times are GMT -5. The time now is 08:24.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.