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My 150 lower unit has a problem. I have access to the above 200hp ocean pro. Model years are the same. Will they bolt up without modification? The Ocean Pro has a longer shaft length. If the unit will work, is swapping my shaft and shifter from my lower unit over to the 200 lower unit an easy task? The only visible differences I can identify are the water intakes. The ocean pro has an exterior bolt on debris screen. My 150 has 4 holes with the interior screens.