I/O vs. OB

76Red18 · #1 07-10-2010, 09:33 AM

Properly set up, I would think there wouldn't be much difference. HP is HP. The lightest power source will be the fastest. What are the weights of a modern 250 hp outboard vs. a 250 i/o? Straight inboard is a different story because of inefficient drive angle. Not the fastest but probably the best ride.

Islandtrader · #2 07-11-2010, 09:58 AM

Quote:

The lightest power source will be the fastest. What are the weights of a modern 250 hp outboard vs. a 250 i/o?

A 300 HP Mercruiser with Bravo Drv.900 #

A 300 Yamaha 4/s 800#.

So hundred pounds lighter, I bet the speed would be insignificant.

Remember I asked which would be faster, not which would be better

It is interesting getting everyone's opinion.

Ford or Chevy...Black or White!

77SceptreOB · #3 07-11-2010, 06:50 PM

Quote:

A 300 HP Mercruiser with Bravo Drv.900 #

I had a 300hp Mercruiser (7.4L) which is a 454 ci Chevy block and a bravo 1 drive, It was way heavier than 900 #, all together it was close to 1300#.

Blue_Heron · #4 07-11-2010, 09:43 PM

Quote:

I had a 300hp Mercruiser (7.4L) which is a 454 ci Chevy block and a bravo 1 drive, It was way heavier than 900 #, all together it was close to 1300#.

I don't know the weight, but the current 300HP Mercruiser is a multi-port fuel injected 5.7 liter,(350ci) small block.
Dave

Fr. Frank · #5 07-11-2010, 11:13 PM

Quote:

I had a 300hp Mercruiser (7.4L) which is a 454 ci Chevy block and a bravo 1 drive, It was way heavier than 900 #, all together it was close to 1300#.

I don't know the weight, but the current 300HP Mercruiser is a multi-port fuel injected 5.7 liter,(350ci) small block.
Dave

One site lists the complete package for a Mercruiser Magnum 5.7L 300 hp motor, transom mount and Bravo 2 drive at 1083 lbs.

Islandtrader · #6 07-12-2010, 10:09 AM

Quote:

I had a 300hp Mercruiser (7.4L) which is a 454 ci Chevy block and a bravo 1 drive, It was way heavier than 900 #, all together it was close to 1300#.

I don't know the weight, but the current 300HP Mercruiser is a multi-port fuel injected 5.7 liter,(350ci) small block.
Dave

One site lists the complete package for a Mercruiser Magnum 5.7L 300 hp motor, transom mount and Bravo 2 drive at 1083 lbs.

A big block will always be heavier than a small block.

A small block will be heavier with a bravo 2 drive than a small block with a bravo 1.

My numbers come directly from Mercury (in brochure form).

Blackfin26 · #7 07-11-2010, 10:28 PM

I'd say closer to 1300 lbs for the I/O myself...I think the 5.0 merc in my Hiliner and bravo 3 is about 1100 lbs. The new 300 Yamaha should be closer to 575 lbs not 800.

oldfielder · #8 07-15-2010, 06:44 PM

I top out around 4400, which is really the bottom of my 4400-4800 range, so I may be slightly overpropped but I don't let it bother me.
As far as weight/wind resistance, you are probably spot on. I added a simple three sided enclosure this year to the t-top for a little break in November from the wind and I've lost a bit off the top. It's amazing how that little item changes things in the wind-even when docking.

oldfielder · #9 07-17-2010, 12:46 PM

Hit 39.5 today with the windscreen up, two big guys and about 50 gallons of fuels and 4 big fluke on board

Was burning exactly 20 gph and running in a slight chop(which the boat seems to like best)