Suzuki developed a special high trust 60 hp outboard engine for workboats. Reduction 2.42:1 and a 14 inch propeller.
Link: The new Suzuki DF60AV High Trust Outboard
Link: The new Suzuki DF60AV High Trust Outboard
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My 40hp e-tech Evinrude is higher thrust than that. It has a 2.67-1 gear and swings a prop almost that big.