260 performance issue

[zekester]

My buddy has a 2007 260 with 6.2 litre and bravo 3 drive, his top speed is 35 mph at 4500, cruises at 30 mph at 4000, I know it’s a fast cruise, but do the numbers sound right? What should his cruise be at 3200? Or what RPM for 26 mph?

 

[Bill Gunn]

That does sound fairly correct. Those boats are very heavy and cruising plane cannot be achieved at anything under 3500 rpm's. I have an 2008 with a 350 and I achieve plane around 3500-3600 rpm's at around 25 mph. I typically run it at around 3800 rpm's at roughly 27-28 mph.

 

[Lazy Daze]

My buddy has a 2007 260 with 6.2 litre and bravo 3 drive, his top speed is 35 mph at 4500, cruises at 30 mph at 4000, I know it’s a fast cruise, but do the numbers sound right? What should his cruise be at 3200? Or what RPM for 26 mph?

That engine has a WOT quite a bit higher than 4,500. If memory serves, it's either 5,000 or 5,200.

I suspect one of a couple things are happening...

-- He's not properly trimming the boat for max speed. He should be able to get into the 40's.
-- The hull is dirty or the props are fouled.
-- The engine is low on compression
-- Maybe a few other things - but you get the idea