what would the top speed be for a 2002 42' with 525

85-88??

Too high. Everyday numbers around 80. Lighter loads 82-84 in good conditions. These are from alot of hours running with and on a 2003 42 with 525's.

80-81 pretty much max.

I agree. That would be all of it with a light load.

This is from Fountains Web site for the 42 Executioner...: They run the same as a 2002 Lightning with the same cabin interior.

Recommended Power:
Twin Mercury 525 EFI w/ Bravo 1-XR/SSM

Speed:
86+ mph

Cruise (Fuel) at 58 mph:
54 gph

Miles per Gallon:
1.1

WOT (Fuel) w/Twin 525 Mercury:
90 gph at 86 mph

Maximun Cruising Range:
300 miles at 90% capacity

91 MPH for my 2005 42 which is slightly different hull but the same interior.

525EFIs, Bravo XR/SSM Shorties, no ITS, 32 Pitch Labbed Maximus props. 88 MPH with non-labbed back-up props.

The boat was set up by Brian Forehand at the factory in 2007.