Twin outboard engine swap to single outboard same Hp

[Narcoholic]

Has anyone taken a twin engine outboard boat and swapped out the twin set up for the same hp single set up ? I was wondering if the loss of some weight and loss of drag from another lower unit helped or hindered.

[25two.stroke]

I've done it on fishin boats and the duals normally out-perform a single even of the same hp.

[NAVISPEED1]

https://www.youtube.com/watch?v=gG_-YmGN8SY

[Bodhi]

What type of boat are you looking to do this on?

[mrichartz]

More than once was glad I had two...

[Narcoholic]

https://www.youtube.com/watch?v=gG_-YmGN8SY

Thanks for the video. Kinda what I was thinking the out come would be.

[Narcoholic]

25 Fountain. I have twin 175's Mercs but was thinking about going 350 Verado , 400 If I could find one cheap enough which is highly unlikely i know. I was thinking one less drag in the water and the weight loss, but two motors is still two motors creating push and lift.

[powerabout]

the answer is depends....and that will be on the prop load.
if you are short of blade area with a single then twins will be better
then the speed issue as drag goes up, so depends on the speed as well

[mrichartz]

Need to look back ..but something about less prop slip with twins and just Better performance..it out outweighs the drag of the other lower unit..
And handling is better

[powerabout]

Need to look back ..but something about less prop slip with twins and just Better performance..it out outweighs the drag of the other lower unit..
And handling is better

prop slip is still a variable with boat weight/drag
Look at years of Mercruiser where you could choose 16" or 20" lowers, heavy boats needed the 20" light ones didnt.

[mrichartz]

Oh yes..
I just remembered something that with twins same setup etc that the slip was better...how much etc I don't know and vaguely remember. Don't remember what kind of boats the tests were done with. I just mentioned it was something to look up/at.. but either way I'd still say 2is better than one even if you lose a tiny bit...could be that day you get home..lol

[Forkin' Crazy]

Need to look back ..but something about less prop slip with twins and just Better performance..it out outweighs the drag of the other lower unit..
And handling is better

That and with counter rotation the torque cancels itself. No drag from a torque tab or crabbing of the gearcase.

[mrichartz]

That and with counter rotation the torque cancels itself. No drag from a torque tab or crabbing of the gearcase.

Thanks..
That's what I was getting at..I forgot to finish lol long day.
How much with that boat you'd have etc???.

[Narcoholic]

Thanks..
That's what I was getting at..I forgot to finish lol long day.
How much with that boat you'd have etc???.

Not sure what your asking ? Right now speed is low 60's. I need bigger props because im hitting the rev limiter with 3/4 tank and two people on board.

[mrichartz]

Oh didn't mean actual question more rhetorical thinking out loud..kind of thing and that was nothing like what I said I didn't look at it before it sent
Was driving and guess it voice typed wrong..
How much torque tab drag etc, and crabbing etc . 25' w single are you going to surface it run it high? Don't know how your looking to use it a fishing center console racer etc and how you have it setup etc...
If that makes any sense...been up all night in pain from..well been up so hopefully that makes sense..