Thread Tools Search this Thread
Old 26 March 2001, 15:35   #1
Country: Netherlands
Town: Papendrecht, Holland
Join Date: Mar 2001
Posts: 1
Which motor for a 5.4 RIB

I want to buy a outboard motor in the next months for a 5.4 mtr RIB (Prestige trimaran). What motor do I need, taken into account:
- usage = diving
- load = 4 - 6 divers
- speed = enough for Northsea to reach remote wrecks, say 20 miles offshore
- fuel economy because of limited tank and expenses ofcourse.
- reliable (due to single engine space only)
- occasion prefable due to price range
(<= 5000 pound)

rdewaard is offline   Reply With Quote
Old 26 March 2001, 16:08   #2
Country: Ireland
Town: Ireland
Boat name: Ally Cat
Make: Several
Length: 6m +
Engine: Several
Join Date: Oct 2000
Posts: 333
Hi ,

have a look at the Yamaha 80 hp 4 stroke .

Normally 50 to 60 hp would be enough for a 5 meter RIB but given that you will be carrying divers you will need that extra bit of power to get on the plane .

This engine will give you reliability , power , range and economy . I'm not sure if it will come in at under stg£5,000 .

Our own training boat Ally Cat which can be seen on our website is a 6.8 M Lencraft Lynx ( Mil Spec hull ) She is powered by a 100 hp Yamaha 4 stroke and uses only about stg£6 per day in fuel during a one day Powerboat Coxswains course . Her top end speed is 35 knots .( petrol is about stg£0.55 per litre here in Ireland .

Best wishes ,

Stuart McNamara
National Motor Boat and Power Boat Trainer


Powerboat is offline   Reply With Quote
Old 28 March 2001, 06:18   #3
Country: UK - N Ireland
Town: Bangor
Make: Shakespeare
Length: 7m +
Engine: O/b 225
Join Date: Jan 2001
Posts: 188
If your price range is restricted I would suggest the Suzuki 90 (or 100) two stroke. We have a 90 new last year on a 5.6 Osprey used by the club diving section. It replaced a similar previous 8 year old 100 which gave good service until it threw a leg (since repaired). I think the 100 is now discontinued but the 90 is definitely available at a very competitive price (<4K?). Excellent low rev pulling power, easily copes with 5-6 divers plus gear, consumption not up to 4 stroke standard at lower revs but quite acceptable when run at close to full throttle. My buddy Hugh also has a 100 (same engine with very minor carb differences) new last year on a Humber 5.5 which does around 40 with two up at about 30 litres per hour. This is a well proven V4, relatively light, very smooth but a wee bit noisy.
I would also suggest a look at the new Suzuki 90 /115 4 stroke but it will certainly be above your 5k limit!
Alan Mckewan is offline   Reply With Quote

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

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 04:20.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.