Hello, I would like to replace the standard propeller 8.5x8 on a tohatsu 9.8 short shaft for a heavier solas. The boat weighs about 700-800kg. At full throttle the rpm is 2600. There is not much difference in speed at half throttle and at full throttle. should I take solas prop 8.7 x 7, 8.7 x5 4 blade or 8.5 x 7 3 blade? Thanks...
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