What SHAFT LENGTH do I need? (How do I measure shaft size?)

Measure from the top of your transom to the bottom of your keel. If 15" to 17" long you'll need to get an outboard with a "short" shaft. If 20" to 22" long you'll need a "long" shaft outboard. Nissan outboard shafts are measured from the inside top of the engine mounting bracket down to the cavitation plate on the lower unit (see graphic below). Generally most boats need either a short or long shaft although some boats require a 25" shaft (ultra-long shaft) outboard.



Back to Frequently Asked Questions list