I am running a 140 4 stroke Suzuki on my 86 V20 Step lift At 4200 rpm I am crusing at 25MPH .This rig red lines at 5200 RPM WOT gives me close to 38MPH GPS speed Thats fast enough for me, half the time water conditions dont allow me to go beyond 25Mph. I am getting to old to pound down the bay. Capt K