I have a 1995 - 150 HP OceanRunner on my 21-V
gets me about 38 Knots according to my GPS..

don't know about fuel consumption - never measured it and am basically in denial on that $100 per tank subject anyway...

for the rest I do not know anything about it - which probably is a good sign about reliability .. have the Dealer do the scheduled 100 Hour interval maintenance jobs on it; for the rest just feed it oil and gas..

/chipde