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Old 03 March 2013, 14:08   #51
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Quote:
Originally Posted by whisper View Post
Yep



Yep, good advice too

Also if those are holes in the transome, they need to be dried and filled.

I'm about this week near J16 of the M4 if you need any help, I also have the correct gelcoat pigment for your rib

I should be out on the water later in the week if you can make it down to the solent, maybe friday?
Thanks for the offer of help, not sure just how much I can do to the rib this week as I have a little project in the garage that I have not touched all week and I want it finished within 8 weeks.
Oh and I suppose I had better go to work as well.
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Old 03 March 2013, 14:11   #52
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Originally Posted by paul tilley View Post
engine looks very low , console too far back , i have elephant trunks
Thanks Paul

I'll add the the trunk to the things I need when I come down.
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Old 03 March 2013, 14:13   #53
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If I lift the engine up the transom as some of you have suggested will i have to raise the transom so the outboard has some thing to hang on
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Old 03 March 2013, 14:33   #54
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If I lift the engine up the transom as some of you have suggested will i have to raise the transom so the outboard has some thing to hang on
No, i don't think so, some are lifted slightly.

If you think it had twins on before then the top of the transome used to be straight so that cut out would have been done by hand.

I'll measure tomorrow how deep the transome cut out is on mine and that should give you an idea
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Old 03 March 2013, 15:06   #55
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Quote:
Originally Posted by whisper View Post
No, i don't think so, some are lifted slightly.

If you think it had twins on before then the top of the transome used to be straight so that cut out would have been done by hand.

I'll measure tomorrow how deep the transome cut out is on mine and that should give you an idea
No it was'nt straight jock showed me it had a crude cover plate, so basically thin air behind a thin plate.

It would be good to no if there is any difference though
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Old 03 March 2013, 15:28   #56
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Am I trimming the boat wrongly ?
Sounds like it is trimmed to far in so the bow is carving.

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Originally Posted by teamplonker View Post
I was taught to trim the boat by getting up to speed throttle back to bring the bow
down and get the top of the outboard level, you should now be at optimum speed.
No Ideally you trim out until either the engine starts to ventilate. Or if you start to feel chine walk (rib starts oscillating from side to side and the hops from side to side)
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Old 03 March 2013, 15:28   #57
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I had a similar problem on my 4.8m boat with a 75hp 2 stroke (biggest engine hte hull can take) and moving the console forward 400mm pretty much sorted it out, it went from being frankly terrifying to very fast and fun. I read a lot of conflicting opinions about lifting the engine and personally concluded that it could only make it worse as would have the same effect as trimming it up. But as I say opinions differ widely on this!
So a few drums of water in bow would be an excellent starting point.

pic of how much I moved it forward



and the final configuration

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Old 03 March 2013, 15:39   #58
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I had a similar problem on my 4.8m boat with a 75hp 2 stroke (biggest engine hte hull can take) and moving the console forward 400mm pretty much sorted it out, it went from being frankly terrifying to very fast and fun. I read a lot of conflicting opinions about lifting the engine and personally concluded that it could only make it worse as would have the same effect as trimming it up. But as I say opinions differ widely on this!
So a few drums of water in bow would be an excellent starting point.

pic of how much I moved it forward

I have been thinking that raising the outboard would lower the center of gravity making it feel more unstable
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Old 03 March 2013, 16:39   #59
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I have been thinking that raising the outboard would lower the center of gravity making it feel more unstable
That's true, but i don't think lifting the engine an inch would do much on CG. A SR has a very low center of gravity....tried to turn mine around, its not easy. I guess standing or sitting down on the bench have a bigger impact than that on CG?

Not two boats are the same, sometimes lifting engine helps, sometimes not. Try to borrow another prop along with swapping weights in different positions, that might sort it out.
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Old 03 March 2013, 16:40   #60
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I have been thinking that raising the outboard would lower the center of gravity making it feel more unstable
No, it'll be fine.

Having read how you were taught to trim,that could partly be at fault as well. SR5.4's respond really positively to using the trim correctly.

Basically, here's what you do.

In flat water, trim out as far as is comfortable without hearing ventilation or getting chinewalk. Be aware if you're doing that, you'll ventilate in sharp turns so you need to trim in and reduce throttle then bring it back on and start trimming out again if you're going for a flat out run again..

If it's rough.

If you're heading into the waves, trim in to keep the bow down so you don't feel the bow 'flying'.
Let the V of the hull cut through the oncoming waves. If you take off a lot, and you feel a double slam all the time as you land you're trimmed out way too far. A 5.4 will chinewalk if you're trimmed out too far heading into the waves.

If the waves are behind you and you're catching them up, trim out as far as you can-you want to keep the bow up or you'll bury it in the next wave. Work tghe throttle to keep the bow up as well.
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