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1965 40 hp super-seahorse....Gearcase/ratio question...

cjbrill715

Regular Contributor
Hi guys, just wondering if the lower units are comparable between, say, a 1956 30 hp johnson, and a 1965 40 hp Johnson??....The outer castings on the lower unit look pretty much identical, but I'm wondering if they share the same gear ratio?? Also....Do they make a 14 pitch prop for these old motors, or is a 13 the steepest pitch??
 
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I think gear ratio is the same.-----But a 1956 lower unit will NOT bolt up to a 1965 model 40 HP.----No it will not !
 
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