Calling single stern drive buffs

Renegade_Master

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Hi Guys, I was at sea in our little Wellcraft 215 coastal recently and made the follwing observations. It has a single 200hp outboard by the way. On board were four fellows one particularly big. Two were seated on aft seat me at the helm and one on the seat next to the helm. Fuel 50%

My problem was trying to keep her on the plane. Leg down we get to about 4-4500 revs before she drops onto the plan, and proceeds at about 22 knts. 5000 plus revs produced 28knts.

Problem is when you go into a turn at say 20-22 knts she bogs down and can come off the plan with much cavitation. Also when it got a bit lively at 22kts about 4000revs, I tried to bring her back to about 3500 hopefully to get about 18-19knts, but she comes off the plan.

Now clearly she is aft heavy. So maybe three options, put some ballast on the bow, or trim tabs or get rid of the fat bugger /forums/images/graemlins/grin.gif What does the team think. Clive
 

itsonlymoney

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QUOTE
"lose lard-boy"
/forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
 

Alistairr

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As Wiggo says, Keep the Leg trimmed right in, I.E, hard against the transom. then once on the plane, trim out till the nose rises and the speed increases.
Only make high speed turn when you have reached a descent speed, but before you do, bring the leg back in a bit, or even all way, once turned trim out again so as speed rises again.

Other than that, throw Lardy Boy Overboard!!!!!

Trial and Error really.

Good Luck,

Alistairr.

Does this make me a 'Single stern drive buff'??? /forums/images/graemlins/grin.gif
 

Renegade_Master

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Have got the leg right in on the turns, still starts to bog down speed drops right off, revs go up sharply have to trottle back. No I believe there is a weight distribution problem, even without lardy boy /forums/images/graemlins/grin.gif

Should be able to cruise along at 17-18 on the plane IMHO
 

whisper

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" should be able to cruise along at 17-18 on the plane IMHO"

Yes IMHO I think you're right. I'd have thought that this would be easy with 200hp on the transom. Is it revving to max revs, is the prop correct size/pitch, is the hull dirty, how "lardy" is this bloke ?

I almost bought one of these a few years ago - perhaps a good job I didn't, now.
 

Alistairr

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Mmm don't know if you can keep a sportsboat planing at those speeds, on My 23'6" Cuddy it will drop of the plane at anything under 19knts.

I think you need greater speed b/4 turning, Other than that, it does sound as though the weigh Distribution could be all wrong.

How much Fuel and water do you have on Board???
 

whisper

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Our former boat - Ryds 23 - had a relatively heavy AD31 lump (150hp). This would stay on the plane from 14-15knts onwards - needed more revs and trim tucked in, during fast, sharp, turns admittedly. Had a medium V hull and duoprop. The latter may have helped I suppose.
 

Alistairr

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I would suggest going out on your own the next time and playing with different trim postitions and speeds, to see how you get on, See if less weight makes a difference.

I am having my first outting this year, on Sunday, and think i'll try some reduced speed planing, see how slow i can go on the plane, I never usually go anywhere with less than 3/4 throttle, or full!! /forums/images/graemlins/grin.gif
 

gjgm

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outboard, not sterndrive? Anyone know revs on this? 200hp on 21ft boat is giving 22knts at 4500revs? Seems very high revs;prhaps the prop is wrong? Dont think ballast anywhere is a good solution on 21ft...
Put pork-chop up front in the anchor locker (size depending), or get some fitter mates !
 
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