Mercury Outboard 50hp 500 57244A4 Upper Shift Shaft 70s Long Shaft 21" 18hp Part #'s Included Clamp Brackets:

Part #'s Included Clamp Brackets: 277253 203155 201925 201926

(Before they switched to the solid tubular one)

but still is interchangeable

Please check you manual for ultimate compatibility

MerCruiser 185hp (2bbl) / 205hp (4bbl)

Mercury Outboard 50hp 500 57244A4 Upper Shift Shaft 70s Long Shaft 21" 18hp Part #'s Included Clamp Brackets:Came off a Mercury 50hp 500 1970 1976 with Serial# 3820730 4cylinder cyl. 2 Stroke Vintage Kiekhaefer Item Condition and Notes: Good working Condition Slight bend on the shaft, but nothing that should inhibit function (you can kind of see it in the last picture when it is up against the tape measure) Please Inspect Pictures for condition Freshwater Part 21 1 4" Part #'s Upper Shift Shaft Assembly: 57244A 4 Yours should look like this one. Please ask