twin outboards on a 20cc

tangofniro · #1 02-02-2003, 12:44 PM

Has anyone ever considered placing twins on a 20?
It is just a thought but twin 90s or 115s are very appealing on the back of a bracket.

Mark · #2 02-02-2003, 03:18 PM

According to the Yamaha website, the weights they list for the 20# shaft, would make twin 60's 456# (for 2-strokes). Considering the fuel economy issue, it would seem, at that weight, that going with a single 4-stroke with higher HP may be somewhat more tempting. There are 140hp 4-strokes that only weight 426# for the 25# shaft version.

Only $99 for one year of SeaTow....

Jon G · #3 02-03-2003, 01:27 AM

I saw one a long time ago I believe it had twin sixtys or seventys on it right on the transom.I think the reference section on the first page of the site has some spec's on a 20 with twins. I would think twin Yamahas three cylinder 90's would be great, I would think a pair of four cylinder engines would be to heavy. I think Bomb has a 75hp Fict a pair of thise would go nicly too.

eggsuckindog · #4 03-19-2003, 12:05 AM

I had a 23 with twins switched to single, don't do it, the boat ran like different boat with a single.Wouldn't trim with twins just ran like crap,I didn't know that until I switched. I think it has to do with the deadrise in the hull,the twins maybe took the pivot off the center chine which is the deepest V.

barnacle · #5 03-19-2003, 08:10 AM

It sounds like you had a rigging problem when the engines were changed. As for the 20 footer I am going with a single Evinrude 150Di, on my 20ft. c.c. THe 25" 150 is 427 lbs vrs 425 lbs on the 140 4 stroker. The 4 stroker is a inline 4 cylinder and the 150 di is a v-6. Rember these new di engines are stronger, less maintence, cleaner, and burn less gas than the 4 strokers, in the same hp. range.

Briguy · #6 03-19-2003, 12:30 PM

Dixon, I have a 23' cc that had a single 225 Johnson, I swapped it for twin 130 Yamaha's and now run 115 Suzuki strokers. I can honestly say the performance is much better with the twins. The extra weight keeps the ass in the water when it's rough out, trim works as well or better for digging in the bow or lifting it high for extra speed in a smoother waters and performance was better in terms of hole shot and cruise speed. Maybe joe was right about your rigging. You just can't hang a pair of 25" twins off the back as a replacement for the 25" single. You would have had to raise the transom by 5". Even then, my twins liked to be 2 bolt holes up from stock.

Bigshot · #7 03-20-2003, 03:30 PM

Depending on the use, twin 60 Merc 4 strokes are the lightest but 120hp may not be sufficient. Twin 90 Yamaha 2 strokes at 260lbs each would be a great choice like said above. With a flotation bracket like Briguy has the extra weight should not be an issue but a single 150 Ficht would be faster probably than the twin 90's.

TUGBOAT · #8 03-27-2003, 01:58 AM

Kinda late on this one, but I remember back when You saw a lot of SeaCrafts in this area. They had twin 75's.Mostly as a pre-Caution to get back from the Bahamas,They were the trusted boat(Smaller) for this trip.