Mercruiser 7.4 MPI vs 7.4 MPI Bluewater Horizon

[tomschauer]

This past weekend a friend was on our boat, he has the same boat only about 3 years older. He was impressed by how quickly our boat came onto plane and cruised about 24.5 MPH at 3400 rpm. He has 7.4's with carbs. I told him I have the same motors with MPI. Later in the evening, back at the dock he asked to see the motors. When he saw the "Bluewater Horizons" he told me these are magnum motors with 380 HP and 490lbs of torque, I thought the only difference from the standard MPI and the Horizons was fresh water cooling. The standard MPI's are 310hp with 400lbs of torque.


Can anyone confirm or dispel this?

[Midnightsun]

Don't quote me on this but Horizon designates factory closed cooling and extended service intervals, Bluewater was a marketing thing which improved corrosion in salt water applications and also designated inboard. Extra HP comes from the term Mag or Magnum which is not part of your description. This is handy if you do not have it. http://download.brunswick-marine.com/fi ... /54126.pdf

[bud37]

Heh Tom....maybe if you go to the mercury site and the parts section, there could be some info when you plug in your year and engine serial number....worth a shot......