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Message board > Navigation & sea worthiness > Seawing 254 Trim

Message 5 of 5
Posted by member Terry Asquith on Monday 10 June 2019

Thanks Chris that's very interesting. When we get some controllable tabs we'll see what can be achieved with less power.

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Message 4 of 5
Posted by member Chris Hill on Monday 10 June 2019


on my 254 150HP diesel
With a clean bottom she is cruising at approx 19 to 20kts at 3600 rpm.
At WOT - approx 4000 rpm pushing about 24kts

Fuel consumption is approx 3.5mpg, this is just some rough estimations I did

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Message 3 of 5
Posted by member Terry Asquith on Sunday 9 June 2019

Like you I'm new to the motor boat world with a 234 bought in March and I was just wondering at what speed your boat starts to plane and what the fuel consumption is then. We have a 130 hp engine but unfortunately the Eltrim controller is not fully functioning so tab control is not an option at the moment. Ursula at el Trim GBH tells me "The replacement of ST unit is problemless and the system is compatibel." so a replacement is scheduled. No two boats are the same but I would like to have some idea of what performance to expect, everntually

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Message 2 of 5
Posted by member Chris Hill on Friday 7 June 2019

Hi, I see you did not get any response. I've just recently joined the owners club.
I bought my 254 last September. and having little in the way of problems of getting up on the plane.
My boat is spec'd with the Volvo AD31p 150HP diesel with a Duo prop leg.

I always accelerate with the leg trimmed down, it's my experience that this is always the best way to get any boat up on the plane. If I have more that 2 people onboard, I will usually push the trim tabs all the way down as well, this speeds up the planning process for me.

Once I'm up and running I bring the trim tabs all the way back up, and find all I need to do is trim a bit the port or starboard trim tabs to get her level depending on wind and weight distribution.

I've experimented with the leg trim on calm days, and have to say my 254 runs most optimally with the leg all the way down. As soon as I trim out at all I will start to loose knots, so clearly it is not required. And I can see that the plane wake is just below me in the cockpit which is a good sign I think.

In terms of ballast. I have 3 batteries starboard side, water tank port side, and some heavy lead ballast in a bag that was there with the boat. If the water is empy'ish she leans slightly to starboard. Water tank full , very slightly to port, so I think the lead ballast is ok. There is no ballast in my bow, and I am not feeling at the moment any need for such. But interested to hear more how your 254 is behaving with it there.

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Message 1 of 5
Posted by member Roy Wright on Thursday 11 April 2019

Having just moved over to motor boating I would appreciate it if any member could give me some tips on trimming a Seawing 254. I am having slight problems with getting on the plane and trimming port and starboard.

My boat had quite a bit of ballast that was in the port side of the engine bay. I have since moved this forward to the bow which seems to improve things a bit. Is it best to trim the outdrive fully down until I get on the plane and then use the trim tabs to balance the boat or vice a versa.

Any help would be greatly appreciated.


Roy. (Sofia)

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