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Twin outboard manueverability

Old 12-22-2010, 07:07 AM
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Default Twin outboard manueverability

I am looking for a new to me (used) boat and trying to narrow down my choices. I originally only wanted a twin engine Formula ( I/O's) but now also looking at Donzi CC with Cuddy ( or Scarab Sport 302)as an alternative because of easier (cheaper) maintainence in salt water. Do twin outboards make manuevering as easy as twin I/O's?
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Old 12-22-2010, 07:08 AM
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Yes
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Old 12-22-2010, 07:15 AM
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x2
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Old 12-22-2010, 07:20 AM
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MUCH EASIER. Throttles should let you manuver like a big sporty. I spun a 36' Triple Engine last weekend on a DIME.
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Old 12-22-2010, 07:28 AM
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I'd say "yes" but it depends your definition of "easy". If you have separate throttle and gear selectors, then I think single selector outboard controls make it very easy. Winds can affect your ability to twist the boat but that's true for all boats so no big difference there. I will acknowledge that if you have twin prop I/O drives (e.g. volvo duoprop or mercruiser bravo 3) then you'll have more prop blade surface area grabbing the water and it should turn your boat more quickly. I have a friend with a 32 ft sport cruiser and it turns very fast compared to my 34ft twin outboard.
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Old 12-22-2010, 07:30 AM
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with twins or trips i can turn a boat pretty much on its own axis and length. helps big time, you'll almost never wanna go back to any single engine
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Old 12-22-2010, 07:32 AM
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the way to make it easy is to use more throttle on the reverse engine
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Old 12-22-2010, 07:45 AM
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Wow, lots of fast responses! Thanks to all. Now I need some opinions on the Donzi/Scarab CC's.
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Old 12-22-2010, 08:03 AM
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I've never driven I/O's but I do have twin outboards. The one thing people forget is that every boat is different. My boat, for example, has the motors spaced very close together. I need to think of them as a "big single" rather than having the ability to easily spin the boat using just the throttles. If the motors are spaced further apart, I would think that you would have more maneuverability.
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Old 12-22-2010, 08:24 AM
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Another variable is how close the engines are to the transom. If they are on a bracket or a eurotransom, the propwash does not run right into the hull, so reverse is more effective. Builders do seem to be mounting engines as close together as possibly, usually to gain better transom access and fishing room, but they still pivot farther than most I/Os, so maneuverability is good.
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Old 12-22-2010, 08:33 AM
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i am an inboard with rudders fan, but the difference is minimal, if you can do one, you can do the other with a little adjustment
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Old 12-22-2010, 06:14 PM
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My twin outboards are a pain to operate unlike something bigger with I/Bs.
A single handle controls thrust and gear for each engine.
Both handles (port & starboard engines) are next to each other with about an eighth inch separation.
In addition, they are all the way on the right, making it impossible to face backwards and operate them.

For me, I keep the starboard in neutral (just in case).
I back in using only the port engine since while sitting sideways, it is the easier binnacle to operate.
I have to come in at a 40 degree angle and stop the boat at the outer piling.
Then i crank the wheel the other way and give a short burst of forward thrust to straighten it out.
Then I back straight in.
I only have about three feet to starboard to clear an anchor on pulpit (slipped boats perpendicular to me), and only three inches clearance between my pilings.
I truly wish there were another way, like a better binnacle setup.
So, my answer is, nothing is the same for different O/Bs.
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Old 12-22-2010, 06:41 PM
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My Scarab Sport 302 had twin 225HP outboards on a bracket and the boat was a dream to dock and manuever. I never turned the wheel when docking, scrictly used the outboards to line up the boat to the dock.

Now I have a single I/O and I can't tell you how much I miss the twin's...except I don't miss the alarming rate the twin's consumed fuel. Sometimes I wondered if the engines were fuel cooled instead of water cooled!

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Old 12-22-2010, 07:27 PM
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Originally Posted by dlevitt View Post
I've never driven I/O's but I do have twin outboards. The one thing people forget is that every boat is different. My boat, for example, has the motors spaced very close together. I need to think of them as a "big single" rather than having the ability to easily spin the boat using just the throttles. If the motors are spaced further apart, I would think that you would have more maneuverability.

I really think the ease of turning a boat around with the motors has more to do with the props you're running than how far apart the motors are.

My motors are mounted with standard seperation yet I can VERY easily turn it in it's own length.... and I can do it fast. wind or no wind. Why? I'm running HUGE Bravo 24" props and they bite like crazy. I have actually used this to maintain position while waiting for a bridge to open for about 30 minutes. Got tired of trying to maintain postion against the wind and the current so I just cut the wheel hard and put one into fwd and one into reverse and let her do circles in place for about 15-20 minutes. Was a heck of a lot easier than trying to maintain position, but I will admit that I did eventually get a little dizzy
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Old 12-23-2010, 06:17 AM
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Props make a big difference with outboards.
4 bladed ones give a lot more bite in reverse and enable you to manuever with just clutches and throttles even when the outboards are close together.
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Old 12-23-2010, 06:30 AM
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Default Twin OB will never be as good as a twin inboard but the OP said IO to OB

I think the Twin OB is better then the twin IO in many or most all situations. The wind and tide are your enemy.
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Old 12-23-2010, 07:08 AM
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the diff on my boat was night and day when I replace my 3 blades with 4 blades - I suddenly had real reverse and I can dock without any steering, just the gears. Occasionally I will just use one motor when the conditions warrant...

small, slow moves are my way of docking...if I can get the wind and current alone to dock me, I will...every time...

Last edited by Glen E; 12-23-2010 at 09:10 AM.
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Old 12-23-2010, 07:23 AM
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Originally Posted by Glen E View Post
small, slow moves are my way of docking...
x2

Reminds me of a saying about flying. There are bold pilots and there are old pilots. But there are no bold, old pilots.
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Old 12-23-2010, 03:28 PM
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when in doubt, add power
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Old 12-23-2010, 04:45 PM
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I have driven both twin inboards and twin outboards. I find that the honda's on our world cat handle docking as good as, if not better, then a similar sized inboard boat. I base it on the fact that the engines are so far apart. But cazador has a point. Prop size does make a huge difference.
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