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Quote:

Originally Posted by Jupiter Sunsation (Post 4516477)

BTW the 39 ME was in because the outside motors were eating lower units......if owner was running it hard, it the outside motor would run dry in hard turns. :evilb:

Something for Merc to work on I guess...might be a ways off, but that sounds like it could be solved with a sensor, as in exceeding a bank angle in a turn = cutting fuel to the outside OB, or something along those lines.

Quote:

Originally Posted by cigrocket (Post 4515957)

I think you guys are wrong, that is just the tilt on the integrated Stern Thruster, helps with parking.....lol.

Just saw this..... LMAO! :ernaehrung004:

Quote:

Originally Posted by DFC (Post 4516492)

That wouldn't work. If you were truly driving the boat in rough seas, you could have the boat at different angles and rudder angles, and still be fully hooked up; especially if you were turning on the face of a wave of similar. If you were to cut power to anything at that point, that could be really bad. You just need a better driver (throttleman).

Quote:

Originally Posted by turbom700 (Post 4516446)

What about fuel consumption on these boats? Similar HP either 3 triple 7 and 4 400r's!!!!! I would have to think having one less engine would burn less fuel, and with guys putting 1000hrs on a boat that could add up.

The Seven Marine 557 burns 55 GPH @ WOT
Mercury Racing 400R burns 38.5 GPH @ WOT
I have not seen numbers on the 627

Quad 400's: 154 GPH
Triple 557's: 165 GPH

Quote:

Originally Posted by hogie roll (Post 4515810)

https://instagram.com/p/BO0qS8wgCqM/

Pretty cool watching those guys in that fishin' bote letting it all hang out.

They need to get back quick before the clouds open up.

Quote:

Originally Posted by PremierPOWER (Post 4516696)

The Seven Marine 557 burns 55 GPH @ WOT
Mercury Racing 400R burns 38.5 GPH @ WOT
I have not seen numbers on the 627

Quad 400's: 154 GPH
Triple 557's: 165 GPH

Trip 557's will be less drag (1 less props spinning, 1 less lower unit dragging in the water, gears, etc.) and should be more efficient. I am not sure what that translates to for cruise speed and top end though.

Quote:

Originally Posted by Sydwayz (Post 4516678)

From what I have seen these setups are DTS and do not have 3 or 4 throttle levers. Controls I have seen are only two levers. One for port engines and one for starboard engines. That kind of setup makes be believe independent throttling of outside motor in a leaning turn would be impossible.

Seems to me they either need a drive guardian type setup integrated into outboards or like was mentioned before some kind of computer control program that automatically changes throttle to compensate.

Seems it wouldn't be too hard to have a kind of system like what an ABS/traction control/torque management system uses where it makes adjustments based on the speed of other wheels/propshafts. DTS throttle would monitor shaft RPM of all the outboards and when one falls outside of a range, it could throttle back to match RPM/cut torque or prop shaft speed to match the others for preservation. Design a linked ECU system for these multi engine installations that treats each motor like an individually controlled wheel of a car. Very similar to what new hybrid/all electric systems car systems where in a turn the electric wheel motors vary speed/torque independently to actually make the car corner tighter and faster than a conventional setup. Torque vectoring.