30 young bros
12 knot cruise with a 225 John Deere is right on. My 30 young brothers with a 6bta was a 12 knot boat at 2000 rpm. The original 8.2 Detroit was right about the same. 12 knots at 3-4 gals per hour makes for an efficient, moneymaking workboat. Want speed ? Push it up, but be prepared for double the fuel burn and half the motor life. All these guys bandy 20 knots around like its easy, it's not in the real world of fishing