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Mariner 40hp Modle 40elo can the lower unit be switched with 91 Mariner 40hp magnum

brncbldr

New member
Hi,
My lower unit yamaha made is toast. I found a 1991 Mariner Magnum Serial # OD89859. are these lower units interchangeable? Also, the owner mentioned it's gear ratio is 2:1. Can anyone tell me if mine serial # 431470 has the same gear ratio?

Thanks!
 
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