Not sure on a 4 blade but a switch to a 17 should be right at +400 RPM - my 200 won't quite swing a 19 3 blade
raising the motor probably would help since you have a better prop - 1 1/2 to 2" for the Cav plate above the hull bottom with a prop like that - shouldn't need any prop shop adjustments, leave the cup in it and raise it
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Any way you measure it - dumbass is expensive
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