Back in the old days when Mercury and Ford were in bed together the MercTrans was born. Most of the guts are from the C-6 Ford hydraulic automatic transmission. It was better than the Borg Warner in three aspects:
1. It was lighter with its aluminum case.
2. The engine could be closer to the transom for better weight transfer and front of the engine accessibility.
3. It robbed less horsepower from the propeller.
I don't believe it was ever offered with big horsepower.