What is the difference in price between the two motors?

I did the Oshkosh June poker run last year with my 05 42' Executioner with 525efi's with the same group as mentioned above and ran 78-80mph. This year I ran my 06 42' Executioner with the 600's and ran 88mph, same group on board. 8-9mph increase I think is substansial.

I will post my results once I run the boat with the shorties and herrings, either this weekend or next weekend.

I agree with Marginmn, the torque is awesome with 600's.

Saw the boat and the 2 Merc boxes at the warehouse...did you get them on and a chance to run it?
Also, I am finaly able to get over there to finish my carpet install...I love the black in there.
Good luck with the upgrade let us know how she did.

Gtting back to the price spread between the 525 + 600.

I heard the actual cost differance was $15k/motor..

Can any one verify this.... That's about the price of whipples
and the whipples will get you much more hp....
I was told by a dealer, to buy the 42 X with 525's and 1.35 drives, then whipple out the motors to 850hp....

Any thoughts....

One more thing.... Does the 600 package come with its??????

That could be worth the differance

It would be nice to have a 700hp kit for those...I don't think the Bravos with handle that 850 mark...
After riding on a 600SCi boat with the smart craft, it was cool to scroll through engine functions.

how much wiring would have to be changed? or would the 600's pulg in to the harness of a 525sc . There must be more wiring for the smart system.

My 42 X w/ 600's, shorties, herrings, etc. will be here in 3 weeks. I'll let you know.

Buy a Fountain, do you boat out of sarasota? I used to live on Roberts Pt road back in the Late 70's.

I had a 2002 42 lightning with 575's, staggered that ran 89 at the factory and I saw 88 on my gps.