Thank you for the info. Need to go to bed now, it`s nearly 2:00 in the night here, but it`s hard to sleep it`s nearly as light as the day!

Best regards from the land of the midnight sun!

Mudball, What were your numbers prior to the swap? Power,Prop,Rpm,ect? Very nice. Thanks, Doug

Before HP500:
Engine: 1999 7.4mpi.
Prop: 24p stock Bravo.
RPM: Don't remember exactly, but around 4600-4700.
Best speed ever was 63 gps. Normally around 61-62.

Kent, How much taller is the 500HP than the 7.4mpi? Doug

The HP500 is taller on the intake, but the exhaust is about the same as the 7.4mpi with the riser spacer, like this pic, after it was pulled...

Hei, found this in a old brochure:

1999
HP500 carb.
Length 38,19
Width 32,68
Hight 23,23
Depth 9,62 single / 13,38 side by side
Weight 1090lbs. Bravo1

1999
7.4MPI
Length 39,02
Width 32,02
Hight 24,02
Depth
Weight 1148lbs. Bravo1

Length=Taken at transom at crankshaft centerline to forward most part of the engine

Height=Taken from engine crankshaft centerline

Wow, that shows the HP500 as 3/4" shorter!!!
Fascinating!
My HP500 intake was taller than the MPI intake. I remember that because I measured everything before the swap to make sure it would fit. I wonder if they are talking about the exhaust risers? I would believe that the exhaust might be a little shorter.
Kent

Maybe, on the picture it shows the exhaust ca. 1/3 up on the flame arrestor...

I would have thought the HP was higher. You guys are good! Hydrolift, Do you have the numbers for a carb 7.4L and a 500HP EFI? My 7.4L is tight in there, in every way. Thanks Doug

HP500EFI Bravo1 (1999)
Length 87,2cm 34,33in
Width 85,7cm 33,74in
Hight 56,0cm 22,05in
Weight 516kg 1137,59lbs

Havent got any data on the carb 7,4L