Reply
 
Thread Tools Search this Thread
 
Old 14 August 2004, 16:37   #1
RIBnet supporter
 
Erin's Avatar
 
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,830
Heavy steering on full lock!

Just got my new rib last week and have been out having a play this afternoon trying to get the hang of it and find out how much fun I can have

However, I've encountered a bit of a problem which worries me slightly. When I go into a tight turn the steering becomes extremely heavy and I have to use both hands to straighten the wheel up. Now this may not seem like much of a problem, but it does mean I have to take my hand off the throttle which I'm not too fond of doing when I'm manoeuvering. It may just be due to the weight of the engine, the torque, the tightness of the turn etc, but is there something wrong with the steering, or is it something I'll have to put up with unless I go hydraulic?

The boats a 6m with Suzuki 90 hanging off the back... a heavy lump I know.
__________________
Erin is offline   Reply With Quote
Old 14 August 2004, 17:05   #2
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
I have the same problem. I think it's a standard sort of problem.
__________________

__________________
Tim M is offline   Reply With Quote
Old 14 August 2004, 17:32   #3
Member
 
Hightower's Avatar
 
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,855
Is it as heavy when moved from lock to lock when stationary?

I suspect that it might be the torque from the prop that might make the steering heavy at the extremes of lock. Only a thought, hope it helps.

Andy
__________________
Hightower is offline   Reply With Quote
Old 14 August 2004, 17:53   #4
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
Quote:
I suspect that it might be the torque from the prop that might make the steering heavy at the extremes of lock.
Hence it gets worse at higher revs....
__________________
Tim M is offline   Reply With Quote
Old 14 August 2004, 18:05   #5
Member
 
Country: UK - England
Town: Portsmouth
Boat name: Sting
Make: Tornado 6.8
Length: 6m +
Engine: Yam 200 HPDI
Join Date: Oct 2002
Posts: 637
Send a message via MSN to Andy
Is the boat new? If its not then read on .... if it is new then this may not help you.

Try getting a grease gun and pump some into the nipples that lube the support shaft (not sure whats the techy term for it). The engine turns within it. This can bind when under load if its not greased regluarly.

It could also be the cable are getting on a little and binding. Turning tight corners puts lots of load on the steering system and can often shows up problems.
__________________
Andy

www.badviz.com
Andy is offline   Reply With Quote
Old 15 August 2004, 04:51   #6
RIBnet supporter
 
Erin's Avatar
 
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,830
The whole lot is brand new, so it really shouldn't be a lack of grease. It's basically when trying to come out of turn that it gets really stiff. I suppose I'm trying to change the direction of the whole boat which must weigh close on half a ton (plus passengers) with just a little steering wheel. It's fine going into the turn, it's coming out that suddenly takes me by surprise
__________________
Erin is offline   Reply With Quote
Old 15 August 2004, 07:23   #7
Member
 
Country: Ireland
Town: Ireland
Boat name: Ally Cat
Make: Several
Length: 6m +
Engine: Several
Join Date: Oct 2000
Posts: 333
Stiff steering

There will be a little trim tab (vertical fin) on the anti cavitation plate behind the prop. It will be unpainted zinc as it also doubles as a sacrificial anode.

By moving this slightly it will take the pull out of your steering.

If confused as to which way to adjust it. Look at the engine when the boat is sitting on the trailer. If your boat is pulling to port move the trim tab out further to port and vice versa for starboard.

You should not have to move it more than 30 degrees from straight. 10 to 15 degrees would be normal.

Be sure to tighten it properly before going back on the water !!

Here at the Powerboat School we find that this is a common problem with boats bought off of casual agents who have not set up the boat properly prior to delivery as opposed to boats bought directly from the manufacturers or an approved agent.

Of course my final advice would be to go out and book an RYA ( UK ) or ISA ( Ireland) Level 2 Powerboat Handling course which will teach you all this and much much more for the price of a sailing jacket !

Feel free to email me off list for further help or a more detailed reply ( Dashing now for lunch !!!)

Kind regards,

Stuart
__________________
Stuart McNamara
Club Powerboat.ie
www.powerboat.org
Powerboat is offline   Reply With Quote
Old 15 August 2004, 15:11   #8
Member
 
Country: Ireland
Town: Ireland
Boat name: Ally Cat
Make: Several
Length: 6m +
Engine: Several
Join Date: Oct 2000
Posts: 333
Cable steering

Just as an aside , we have a wide range of RIBs here from 60 hp to 130 hp . All can be driven (as they should ! ) with one hand on the throttle at all times and one hand on the wheel with easy and finger light operation of one handed steering up to full throttle.

So this is not a problem you should accept or consider normal !

Most modern engines come with the anode / trim tab already pre curved like a wing to enable a slight to counter the torque effect of the prob at high power..

Best wishes,

Stuart
__________________
Stuart McNamara
Club Powerboat.ie
www.powerboat.org
Powerboat is offline   Reply With Quote
Old 15 August 2004, 15:46   #9
Member
 
Hightower's Avatar
 
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,855
There could be another reson for it being heavy during a very tight turn. As the RIB and outboard are angled (possibly 20/30 deg) in relationship to gravity whilst executing your turn, you have to effectively lift a percentage of the weight of the whole engine to get the boat to staighten out, it might not be too much of a problem for hydraulic steering but for cable type I guess it could have an influence!

This might be another reason steering feels heavy when trying to straighten her up.

But it's something most of us "cable" RIBsters have to live with and quite normal I think.

Andy
__________________
Hightower is offline   Reply With Quote
Old 15 August 2004, 15:59   #10
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
i have the same problem with my pro sports, but only when the weathers hot!!! How strange is this?

Belive Ian as the same problem but hes got a 250hp on cable steering.
__________________

__________________
JG Marine Services Ltd Specialist Safety Boat Services

Bodfuan Shoot Ltd Traditional British Game Shooting
Jono Garton 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 07:37.


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