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Old 22 July 2011, 15:15   #11
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
Originally Posted by charlie65 View Post
not sure what it says ill check it tomorrow, as for trim tabs there is none , surely the outboard engine trims ??
Above the propellor is a zinc shaped like an upside down shark fin. On your size engine it should be about 10cm long. That is the trim tab on an outboard. Is it dramatically worn or missing altogether?

While a simple part, if it is misadjusted, worn/eroded, or missing it can cause all sorts of pulling problems.

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Old 22 July 2011, 15:38   #12
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Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
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Originally Posted by charlie65 View Post
maybe im wrong it was advertised as a humber predator , ok then maybe just treat it as a 5.5 metre humber ??
Post a pic. Someone will know what it is.
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Old 22 July 2011, 15:49   #13
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
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That is the trim tab
thats not doing it. it is the up/down power trim ya need to play (carefully) with.
Trim the leg down (in as far as it will go towards the transom) when setting off and as soon as its on the plane trim up (moving leg out from transom) by stages until the steering lightens up and the boat rides flat without pulling to one side.

lets have the pic to see what model it is. Need to see bow and stern profiles. Various Humber models as earlier post. All have different characteristics.
Dave M
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Old 22 July 2011, 16:53   #14
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Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,947
Originally Posted by charlie65 View Post
advice needed

I have a Humber Predator 5.5m rib with a mercury 150 outboard , i have only purchased this , it was used as a dive boat, i have bought it to use for fun in and around belfast/bangor/northdown.Up to now i have not taken it much over 1/4 throttle as it feels out of control and dangerous, i have alot of inland water boating experience but no sea experience , ,i have been told the engine may be too powerful for the rib ? could this be true?, today there where 3 persons on board and it was anything but fun , the seas where not that choppy
the boat seems to pull to the right alot

any advice would be much appreciated
In a previous existence I had a 5.85 with a 175 on the back, a handful but not flighty or unstable. I'd rather see it with a 150 than a 115. What prop is on it?
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Old 23 July 2011, 07:50   #15
Country: UK - N Ireland
Town: belfast
Boat name: no name yet
Make: humber predator
Length: 5m +
Engine: 150 mercuryoutboard
Join Date: Jul 2011
Posts: 6
humber rib

thank you all for your advice , i am on me way now to take pics so i will post them later tonight

thanks again everyone it is much appreciated
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Old 25 July 2011, 04:12   #16
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,614
Just as a thought, if it was a dive rib, is it maybe set up to be perfectly balanced with umpteen heavy cylinders in a rack somewhere?

I've "only" got a 60 and there is a perceptible difference in handling between the forward tank being full & empty. Granted the whole caboodle only clocks in at about 430Kg when full of fuel......

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