Thread Tools Search this Thread
Old 30 March 2004, 06:14   #11
Country: UK
Make: Ribcraft
Length: 4.8m
Engine: Mercury F60 EFI
Join Date: Dec 2003
Posts: 89
Did you have this problem on your 4.8?

Robert1 is offline   Reply With Quote
Old 30 March 2004, 06:18   #12
Country: UK - England
Town: Whitstable
Boat name: Tango
Make: Avon and Narwhal2.4m
Length: 4m +
Engine: 60HP Yamaha
Join Date: Oct 2002
Posts: 966
I've recently been playing with the trim on my engine after finding the steering pulling to one side, by trimming the engine up a bit i can get the boat to ride slightly higher at the bow, the boat runs straight even to the point i sat and had a cup of tea at 30 knotts no hands and she ran dead straight, the bow raised makes it a lot dryer ride when its choppy and i've attained a few more knotts - which is always a good thing


Bilge Rat is offline   Reply With Quote
Old 30 March 2004, 10:18   #13
Country: UK - England
Town: Essex
Boat name: Inflatable
Make: Ribcraft & Zodiac
Length: 5m +
Engine: Suz F140,F6 & Yam F6
Join Date: Aug 2001
Posts: 246
Send a message via AIM to JCW
with the engine trimmed in there is a tendency for water to splash into the transom well, with the boat trimmed out this should not happen. As Gary said, the trim on this size of boat makes a massive difference, and it will not be long before you get a feel for what is right and wrong. My experience of helming larger boats is that the trim has less effect than on my 4.8.

JCW is offline   Reply With Quote
Old 30 March 2004, 12:24   #14
Country: UK - Wales
Town: Milford Haven
Boat name: Various
Make: Commercial
Length: 10m +
Engine: Screw / Voith / Jets
Join Date: Sep 2002
Posts: 791
Send a message via MSN to Alex Brown
Originally posted by Robert1
so trimming the engine away from the transom solved your problem?
Yeap, that's right.

From 'default' level trim on the guage to full up trim on flat water, there is very little difference to the handling of the boat apart from lots of water going high at the back.

I do find however, that when the engine is trimmed down, the boat is very keen to lean to port, especially when working in choppy water.

In my case, I'm not sure if calibrating my trim would work though Gary.... when the guage reaches the top, straight after that, the engine goes into shallow mode which might not be so good when bombing along at 40 knots.

Flickr Photos
Youtube Videos
Alex Brown is offline   Reply With Quote
Old 30 March 2004, 14:12   #15
Country: New Zealand
Town: Dunedin
Boat name: Zebedee
Make: Zodiac
Length: 3m +
Engine: Mariner 15 2 stroke
Join Date: Aug 2001
Posts: 73
Hi Robert,

Don't worry, it's not really a "problem" is it, it's learning to use the trim properly. (And Ribcraft do know how to set their boats up correctly.)

What the others have said is right, and also what I experience (with the same boat). Trim too far in and you get the spray. (Of course, trim too far out, and you get wobble, aka chine walk.)

Have a fiddle next time you're out. In the meantime, enjoy your Ribcraft - what a great little boat!


PS: Just going into the third season with mine, which you can see here: Orca, captain and first mate
Simon Guest is offline   Reply With Quote
Old 30 March 2004, 14:51   #16
Country: UK - England
Town: Great Harwood, Lancs
Boat name: Tigger II
Make: Bombardier Aerodeck
Length: 3m +
Engine: Tohatsu 25HP
Join Date: Jul 2001
Posts: 626
Hi Robert

Well I could get if to do it if I wanted to

But saying this it never did it when the engine was trimmed correct for the conditions.

Dont panic, have a play you will soon feel whats right.

Start in calm conditions as once their is some chop you change your trim not only for the load/speed but for what the waves.sea is doing. Keep this out of the equation for now.

Trim is a thing that needs to be learned, and all too many people dont learn it to their loss. Once you learn to trim a RIB propper you can be doing 25kts in in conditions that others that dont understand trim are bouncing all over going 15kts.

As far a bigger boats & trim, well i never move the trim on my 7.8 is best fully in for all conditions. Have tried many positions but makes almost no difference.

Regards Gary
Garygee is offline   Reply With Quote
Old 30 March 2004, 15:08   #17
Country: UK
Make: Ribcraft
Length: 4.8m
Engine: Mercury F60 EFI
Join Date: Dec 2003
Posts: 89
Thanks very much Pete, simmons0, Alex, Gary, Bilge, JCW and Simon. I am now confident I can address the 'problem', sort it out, and learn how to make my boat perform better. Thanks guys - I feel I may need to draw on your experiences again at some point in the future. I'll post some pics of last Saturday's launch in the gallery when I get a chance so you can see the boat.

Cheers! Robert

Robert1 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 13:28.

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