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Old 02 March 2013, 02:57   #11
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Country: UK - England
Town: N. Devon
Boat name: Nutkin Too
Make: X-Pro Defender
Length: 5m +
Engine: Outboard, Suzuki 90
MMSI: 235095884
Join Date: Dec 2008
Posts: 1,367
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I've used Joc's boat before and never found her unstable. However she was always loaded.

With 1 person and no kit on board it sounds to me like a center of gravity thing.

Trim as above or make sure you have enough weight in front of the console. to balance the fuel tanks etc that are behind it.
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Old 02 March 2013, 03:01   #12
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Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 896
Mine is stable until 36-37 knots, chine walking in 30 knots, no way. How about slack in steering system, that might explain the issue?
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Old 02 March 2013, 03:05   #13
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Country: UK - England
Town: Bristol
Boat name: loopy lou
Make: Avon Searider
Length: 5m +
Engine: Honda BF75
Join Date: Jul 2012
Posts: 128
Quote:
Originally Posted by whisper View Post
Trim it all the way in and then trim it out slowly until it starts to feel wobbly.

Things to look for, trim tab behind prob needs adjusting, the engine should be offset to the starboard on the transome, get some more weight upfront. Also check to make sure that your gear box is a righthand (clockwise) rotating.

It might be when it's right up on the planing pad you are not used to it. Can you get another member to drive it?

We are out today if you are in the south?
Thanks for the offer I am in the southwest ( Bristol ) and it would be great for someone else to try the boat but unfortunetly I have a lot of work on today.

I think I will try it with a little more weight in the front .
Are you saying the outboard should be sat slightly to the left on the transom?
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Old 02 March 2013, 03:08   #14
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Country: UK - England
Town: Royal Wootton Bassett
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Engine: 250
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Quote:
Originally Posted by teamplonker View Post
Thanks for the offer I am in the southwest ( Bristol ) and it would be great for someone else to try the boat but unfortunetly I have a lot of work on today.

I think I will try it with a little more weight in the front .
Are you saying the outboard should be sat slightly to the left on the transom?
As you are standing at the back of the boat and looking at the outboard it should be offset to the right. This is the correct way to rig it but many have their outboards in the middle.

I have an sr too that I hope to take out next weekend?
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Old 02 March 2013, 05:31   #15
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Country: UK - England
Town: Bristol
Boat name: loopy lou
Make: Avon Searider
Length: 5m +
Engine: Honda BF75
Join Date: Jul 2012
Posts: 128
Quote:
Originally Posted by treerat View Post
I've used Joc's boat before and never found her unstable. However she was always loaded.

With 1 person and no kit on board it sounds to me like a center of gravity thing.

Trim as above or make sure you have enough weight in front of the console. to balance the fuel tanks etc that are behind it.
Thanks
I think the weight maybe the issue
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Old 02 March 2013, 05:35   #16
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Country: UK - England
Town: Bristol
Boat name: loopy lou
Make: Avon Searider
Length: 5m +
Engine: Honda BF75
Join Date: Jul 2012
Posts: 128
Quote:
Originally Posted by whisper View Post
As you are standing at the back of the boat and looking at the outboard it should be offset to the right. This is the correct way to rig it but many have their outboards in the middle.

I have an sr too that I hope to take out next weekend?
I have referbished many old boats all with outboards but never refitted the outboard with an offset, Always straight down the middle.

If factory purchased does a boat come with the outboard offset ?
What are the benefits ?
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Old 02 March 2013, 05:43   #17
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Country: UK - England
Town: Bristol
Boat name: loopy lou
Make: Avon Searider
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Join Date: Jul 2012
Posts: 128
Quote:
Originally Posted by C-NUMB View Post
Mine is stable until 36-37 knots, chine walking in 30 knots, no way. How about slack in steering system, that might explain the issue?
The steering is fairly new so I don't think its that.
I think it maybe not enough weight up front or could just be me not used to it and this is how it feels.
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Old 02 March 2013, 05:45   #18
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Country: UK - England
Town: Portsmouth
Boat name: Not sure
Make: ABC/Priddy
Length: 10m +
Engine: 2 x 500 FPT
Join Date: Jul 2001
Posts: 926
The Engine is in the wrong place Alan P
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Old 02 March 2013, 06:25   #19
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Country: UK - Scotland
Town: Ardfern
Boat name: Moon Raker
Make: Humber Destroyer
Length: 5m +
Engine: Honda BF 90 D
MMSI: 235035994
Join Date: May 2006
Posts: 694
Quote:
Originally Posted by teamplonker View Post
I have referbished many old boats all with outboards but never refitted the outboard with an offset, Always straight down the middle.

If factory purchased does a boat come with the outboard offset ?
What are the benefits ?
My Humber 5.3 was factory fitted with a Merc 90 4str. offset 2 inches to starboard. I believe the idea is to counteract the propeller torque which, when planing, will tend to make the boat heel to port.

With one or two people aboard it could start to chine walk beyond 35 knots (max 39). In calm water (and I wouldn't want to go that fast in lumpy water) I found harsh, WOT acceleration would initiate a chine walk. With gradual acceleration it remained stable.

The Merc was replaced by a Honda 90, which is around 30 kg lighter. It took me a season to sort out the fore and aft gear stowage and get the weight distribution right so I got the same performance out of the boat. With less weight on the transom, she feels more stable flat out too. Only chine walked once since, again as a result of harsh acceleration at near 40 knots.

Of course, I know it's not a Searider.
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Old 02 March 2013, 06:36   #20
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Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 896
Can't swear my engine is totally in center(need to check) but have a vague memory that previous owner moved the engine from offset to centre of transom, so not so sure that is the issue, as it works fine on this boat.

At least I would not start with moving the engine sideways at this stage. But would try another propeller and also playing with weights also sideways. My console is offset to starboard.

SR 5.4 dos not have a significant planning pad, but think it would have less high speed chine walk if it would.
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