First, out drive and outboards have underdrive gear ratios, your v-drive has a overdrive ratio, therefore the prop is spinnning way faster than the motor. Outdrive and outboard props run slower than engine RPM, therefore need to be bigger with way more pitch than a v-drive. If v-drive used outboard sized props with underdrive ratios you prolly couldn't control the boat. V-drive flats are very sensitive to their props. Some advice, start collecting props if they are that hard to come by there