I/O vs. OB
 

Looking for some info on I/O vs. OB. I have always had I/O power and never had Outboards. Crawling around the bilge is getting old and I am considering going Outboard. Comparing something like a 525/B1 and a 300xs, what would the maintenance schedule look like? Similar times to rebuild? Similar cost? RELIABILITY? How different would they handle on a similar boat? How different is the power delivery and driving style. What are the advantages and disadvantages of each? If I didn't love the sound of a nice big block so much, this would be easier. But there is something to be said about working on your motor without crawling around in a bilge. I know there was a post not to long ago, but no details as to ownership differences. What are your thoughts?

Outboards have come a long way over the last 5 years alone. I like my OB, how much easier is it to pop a cowl off an OB than to root around on your head in a bilge. It gives more cockpit room, saves weight, you can tilt it to the max and give it gas without ripping the U joints out. I do like the noise and rumble of a BB but that feeling fades at the pump. I am getting 11 mpg on my 115 Yamaha 4 stroke efi, I got 1 or less on my HP500s in the Active Thunder at the same rpms. I like the extra room, like 5 ft of extra room, and that is like getting 5 ft more of boat for free but not like a fountian beek:D Or a swim platform.:D

We have the same boat set-up with twin O/Bs and a single I/O. Merc 250XS in the twin, and Merc 525efi in the I/O. In this case the power to weight ratio is almost identical. So with about the same total power and about the same total weight the speeds are also about the same, just over 90mph, actually the the I/O is just a little faster. A good O/B set-up costs a little more

They are very different.

The twin is much more lively, does big wheelies, accelerates much faster, much higher cruising speed. better fuel ecconomy.

The I/O is the king of presentation, more ego satisfaction coming into the dock. better in rough water, carves a turn like you would not believe, has a lower bow height posture off plane. Comes on plane quicker.

Thanks for the info guys. What are the reliability and maintanance differences? How long on either motor before rebuilds are needed? It seems a lot of outboard guys are constantly blowing motors. What is the reality? Tuff, Those are absolutely stunning boats! Do you have more pics?

I thought o/b's were the answer until spending this entire summer without a boat becase no one can figure out what the fuk is wrong with the g/f's eggbeater. ...grrrrrrr. There are a LOT more little detailed parts, sensors, alarms, electronics, ect..ect... on an O/B If your a guy who does your own wrenching there is going to be a ton of new stuff to learn.

Alot depends on the intended boat. Apples to apples, race outboards to race I/O the rebuilds are probably about the same although cheaper with the O/B. Fishing O/B is going to be much more fuel efficient, and will last onger than a 525. I have no idea what rebuilds will be for the 300xs, but I know the 300 promax motors are expected to go around 800 hours before needing anything. Your not going to get that out of a 525, but as said 2 O/B are going to be more costly. By race O/B I was talking about the 2.5 ROS motors. I dont think you will even be considering those, but their life expectancy is not very long. I run O/B and sometimes wish I had I/O because of the whole cool factor, but then again, that only means something at the dock.

You can thank new emissions for all of the sensors, alarms, and other electronic crap that breaks all the time.

If I wanted to hear the sound of weed-whackers, I'd save the drive to the water & stay home to cut the grass.

:D :D

Ive had this since new (2001 yam 250 efi) never been back to the dealer ever.this is my 7 th season.

As long as you have enough of them...

It has been interesting to watch the reactions of people who had a clear preferance to the I/O package after they have a 'back to back' ride in the two versions. People have changed their minds from I/O to O/B, but never from O/B to I/O.

The new DFI stuff that all the manufactures are making is awesome. Big block (for O/Bs) make big torque, highly efficient and for the most part on pump gas.

Its a Yamaha!...would you have it any other way? :D

i have both ,and the aggravation and repair/ maintenance on my outboards isnt even comparable to the I/O's, my outboards run hard ,great mileage and are not trying to destroy themselves by leaning on the throttle, i can have a powerhead on the bench in 20 minutes, a lower off in 10 min and a whole moter exchanged in less than an hour, i would still be unhooking crap laying upsidown in a bilge doing the contortonist routine for double that time ,just to get it out and then the money/time really starts to flow..
go with 300 XS mercury ,youll love and not regret it !

My order of preferance from least to most:

I/O
OB
Diesel w/surface drives

I don't miss yanking drives off the transom at all, nor working in the bilge.

I have had both, enjoy sound of big blocks and torque,. But really enjoy ease of use and maintainance of O/B's and shallow water capablities

Also like being able to use the O/B in colder months when you don' thave to worry about draining water to prevent freezeing ( I know most don't boat in cold weather I do:crazy: )

Also more cockpit space, funner to drive .....if you know how

Besides talking about shock factor wow, you pull up to a dock with quads and the sound of the big block will be a mere annoyance.

and for you non "weed wacker lovers"

Has any one read the Article on Don Aronow in this months Extreme Boats. Offshore racing with Outboards was were it began. :boat:

There is a thread in the banana boat section here on OSO, that talks about an article in this month's issue of Motorboating magazine....check it out you may be surprised.

For me it depends on the size and type boat.....

Small cat, 30ft or less I'd go OB.

Anything over 30ft, except for a fishing boat, I'd go I/O.

For a smaller boat, the OB also gives you more room in the cockpit.

My .02.

[QUOTE=marylandmark;2238472]Think you might be in the wrong thread Charlie?

Then check out www.bananaboatco.com and look under the media section, Motorboating magazine, September 2007.