Mercury Outboard 1973-77 150hp 115hp 85hp Exhaust Plate Extension 64163 64165A1 Carburetor This has the ONE Bolt

This has the ONE Bolt Mount for exhaust extension Plate: (There is a similar one with a Two bolt pattern that looks the same

Mercury Part Number 43-24680 Propeller Gear for KF3 KF3-1 KF3-2 KF3-3 KF5 KF5-1 KF5-2 Super 5 (I'm quite sure the Mark 5 one is different) (possibly others)

This is what Makes this different than subsequent years (1987-1993)

70hp 90hp 115hp 150hp

May also work With Omc Cobra Stringer Volvo

Mercury Outboard 1973-77 150hp 115hp 85hp Exhaust Plate Extension 64163 64165A1 Carburetor This has the ONE BoltRemoved from a 1973 Mercury Outboard 150hp S N 3630289 Inline 6 cylinder Two 2 Stroke Item Condition and Notes: Good Condition This has the ONE Bolt Mount for exhaust extension Plate: (There is a similar one with a Two bolt pattern that looks the same. Make sure yours has the One mounting bolt holes like this one) Please Inspect Pictures for condition Part #'s Exhaust Plate Extension Assembly: 64163, 64165A 1, 66096A 1, 98517A 2, 43289A 2 This Plate