Reply
 
Thread Tools Search this Thread
 
Old 14 February 2006, 11:16   #1
Member
 
Country: UK - England
Town: Southampton
Boat name: Jaws
Make: Gemini 4.2
Length: 4m +
Engine: Tohatsu 50hp
MMSI: none
Join Date: Feb 2006
Posts: 277
Send a message via MSN to Gray
5m rib, 60hp..2 stroke or 4 stroke?

I've been looking around for my 1st boat and the 5m mark looks good for me. Ive seen two boats, both just under 5m, one with a 60 2 stroke and one with a 60 4 stroke. Whats going to be the main differences between the two i.e. performance and fuel usuage etc?
Thanks!
__________________

__________________
Gray is offline   Reply With Quote
Old 14 February 2006, 11:55   #2
Member
 
Country: UK - Wales
Town: Pwllheli-North Wales
Boat name: Delta 1
Make: Delta
Length: 6m +
Engine: Mariner 90hp Optimax
Join Date: Mar 2001
Posts: 2,367
Hi

Depending on the rib about .5 litre per mile on the four stroke and 1 litre per mile on the 2 stroke (unless direct injection), in my experiance.

On a 5m Humber with 60hp Four Stroke we were getting about 35 knots, which seems very fast in a little boat.

Jono
__________________

__________________
JG Marine Services Ltd Specialist Safety Boat Services

Bodfuan Shoot Ltd Traditional British Game Shooting
Jono Garton is offline   Reply With Quote
Old 14 February 2006, 12:04   #3
Member
 
Country: UK - England
Town: Southampton
Boat name: Jaws
Make: Gemini 4.2
Length: 4m +
Engine: Tohatsu 50hp
MMSI: none
Join Date: Feb 2006
Posts: 277
Send a message via MSN to Gray
One is a ribcraft and one is a tornado. I personally only have experience on a tornado and am under the impression their deep v makes for a soft ride. However ribcraft seem to me to be the boat of the moment for that size in terms of structural reliability. Any thoughts?

Both boats are getting 35 knots which is plenty.

GB
__________________
Gray is offline   Reply With Quote
Old 14 February 2006, 13:26   #4
Member
 
Country: UK - Wales
Town: Pwllheli-North Wales
Boat name: Delta 1
Make: Delta
Length: 6m +
Engine: Mariner 90hp Optimax
Join Date: Mar 2001
Posts: 2,367
What about a nice new humber -

2006 Humber 5m - 60hp Four Stroke - 9,995
__________________
JG Marine Services Ltd Specialist Safety Boat Services

Bodfuan Shoot Ltd Traditional British Game Shooting
Jono Garton is offline   Reply With Quote
Old 14 February 2006, 14:43   #5
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,260
The portsmouth uni rib is a 4.8 ribcraft with 60hp mariner 4 stroke. It's a very well built, stable and fast little boat.....
__________________
Tim M is offline   Reply With Quote
Old 15 February 2006, 10:36   #6
Member
 
Country: UK - England
Town: Southampton
Boat name: Jaws
Make: Gemini 4.2
Length: 4m +
Engine: Tohatsu 50hp
MMSI: none
Join Date: Feb 2006
Posts: 277
Send a message via MSN to Gray
Jono...nice looking humber, a little above my price range im afraid but thanks anyway!

Tim, the ribcraft, whats it like when it gets a bit lumpy in the solent. Is it wet and dry and does it slam much....

GB
__________________
Gray is offline   Reply With Quote
Old 15 February 2006, 15:31   #7
Member
 
Country: UK - England
Length: 6m +
Join Date: Sep 2004
Posts: 1,850
Quote:
Originally Posted by golfbravo06
Tim, the ribcraft, whats it like when it gets a bit lumpy in the solent. Is it wet and dry and does it slam much....
For a 4.8m, it's unbelievably dry! She is without a doubt the best sub 5m boat I have ever been on.

Given the hull shape, she handles seas well - however she is fairly light, so does get a little twitchy at high speed (I've had her at 37kts with a 60hp 4smoke bigfoot). Build quality is superb.

If I am ever fortunate enough to be buying new - Ribcraft are definitely top of my list!

You'd be more than welcome to a spin in the Uni boat if you're ever down this way.
__________________
Jimbo is offline   Reply With Quote
Old 17 February 2006, 18:08   #8
DJL
Member
 
Country: UK - England
Make: Ribcraft 6.5
Length: 6m +
Engine: Suzuki DF175TG
Join Date: Apr 2002
Posts: 929
I would definitely go for the 4-stroke. 2-stroke technology in the range around 60HP is still pretty basic.

You can expect to get around 30-40% better fuel economy with a 4-stroke depending on how hard you push the engine (assuming a carb 2-stroke not an Evinrude Etec, Nissan TLDI etc). Performance will be pretty similar between the two.
__________________
DJL is offline   Reply With Quote
Old 17 February 2006, 18:38   #9
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by DJL
I would definitely go for the 4-stroke. 2-stroke technology in the range around 60HP is still pretty basic.

You can expect to get around 30-40% better fuel economy with a 4-stroke depending on how hard you push the engine. Performance will be pretty similar between the two.
Not from the Tohatsu TLdi it's not!!!
__________________
codprawn is offline   Reply With Quote
Old 18 February 2006, 13:13   #10
Member
 
Country: UK - England
Town: Southampton
Boat name: Jaws
Make: Gemini 4.2
Length: 4m +
Engine: Tohatsu 50hp
MMSI: none
Join Date: Feb 2006
Posts: 277
Send a message via MSN to Gray
thanks for the input people...

Jimbo do you know what year the uni's boat was made and how well are the tubes etc fairing up to being used by a university, Soton Institutes boat always seemed to look fairly worn out. Thanks for the offer by the way ill pm you about it.

GB
__________________

__________________
Gray is offline   Reply With Quote
Reply

« Haslar Slip | Top | Hmmm »
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 00:01.


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