Yamaha Outboard 4hp 4-Stroke Flywheel Generator Rotor Assembly 67D-85650-00-00 Exhaust Tubes You will receive a single

You will receive a single key as pictured

120-190 HP Mercruiser®--1983-1985

you get both as pictured)

This is the 59824 with the 3" ends on both sides

They might have discovered that the early thermostats were over-cooling the engines

Yamaha Outboard 4hp 4-Stroke Flywheel Generator Rotor Assembly 67D-85650-00-00 Exhaust Tubes You will receive a singleItem Details Removed from a 2001 Yamaha 4hp 4 stroke (F4MSHZ) that was in perfect working order but had a crack one side half of the crankcase casting Yamaha Part Number(s): 67D 85650 00 00 Rotor Flywheel 67D 15723 00 00 Starter Pulley From my research it seems that this might be compatible with other Yamaha 4hp 4 stroke outboards 1999 2008 & newer (and maybe even older stuff as Yamaha had a very inconsistent parts numbering system). If you are unsure