Sceptre performance - 1/0...vs...outboard

[bgreene]

Maybe beat to death a bit.......but what's the general performance differential between the two. Points to address:

1. Ride differential
2. Affect on " bow heavy" characteristic some comment about
3. Trolling speed .....if slow enough
4. Tracking...
5. Anything else ?


Thanks

[bgreene]

Guess not ...

[bigeasy1]

I can't help with the outboard performance as I have an I/O. Maybe the following will help.

My 1974 23' Tsunami (Sceptre) with a 260hp 350 ci Mercruiser with an alpha drive sits low in the stern as opposed to the outboard models that many say sit low in the bow.
My low stern is probably due to the weight of the 8hp Yamaha (105 lbs) hanging off the back and also the four electric down riggers with 12 lb weights adding another approx. 150lbs.

Having said that the boat jumps on plane almost instantly and rides extremely well. Trolling speed with the I/O does well from 3.5 mph and above,(I can go slower with the I/O but have to throw the bags out to keep the RPM's up).Most of our salmon trolling speeds on the great lakes is from 2 to 4 mph depending on currents.

95% of our trolling is with the 8 hp Yammie kicker If its blowing and too rough for the kicker I'll throw out two bags and use the outdrive.

As for tracking, this is one of the only boats I've owned that tracks in a very straight line when we are trolling and away from the wheel when netting a fish.It also tracks good in idle speed when coming into port.
The above may be because I run a set of 12x12 Bennett tabs with drop fins on them.The drop fins are about 3"deep.
I rarely use the tabs when fishing but they help a lot in a quartering sea, helping to keep the boat fairly level.

I honestly can't say anything bad about the boat other than the thru-deck scuppers are a PIA. The ride is excellent .The only thing that gets a bit squirrely is running in a following sea,it tends to get a bit spooky at times although It may be due to me not being the best pilot.

Hope this was of some help.

[bgreene]

Appreciated BigE.....what are the fins on the tabs ?

[bigeasy1]

Unlike regular tabs that have a flush or upturned 90 deg. bend on each side of the tab The drop fins have a "Down" turned 90 deg.bend on each side of the tab. The down turned edge depth of the bend is also much deeper (about 3")

It increases the trim tab performance by channeling the water flow under the tab and holding it there to produce the maximum lift capable of a trim tab
These fins angle 90 degrees down on the sides of the tab
They stop the water flow from escaping and keeping it under the tab for the full length of the tab .
It works like a much larger tab to provide more lift .Because of the variable deadrise panels on the seacraft hull you can't put a wide tab on the back of the transom. The drop fin tabs act like a much wider tab giving more lift in a narrower space.

Wish I could post some pictures,but since photobucket stopped 3rd party hosting unless you pay $400.00 a year I can't. I've been trying other photo sites but haven't found one that makes it easy.

[Old Goat]

Don't need no Photobucket!

Upload it on here using the attach files function in the advanced page.

[bgreene]

I have Bennett tabs on my current boat....design of tab has small vertical extension 90 degree angle from the tab, approx. 1" on the sides.

[kmoose]

Originally Posted by bgreene

Maybe beat to death a bit.......but what's the general performance differential between the two. Points to address:

1. Ride differential
2. Affect on " bow heavy" characteristic some comment about
3. Trolling speed .....if slow enough
4. Tracking...
5. Anything else ?


Thanks

I Pm’d You my cell #. Give me a call.

[bgreene]

KM - thanks for the info........ and your boat looks fantastic.

Can't figure why a boat just like it really isn't offered in the market today.
Classic lines, highly functional layout.

Congrats to you.