OMC 984979 0984979 Cobra Lower Unit Gearcase Empty Housing 333857-D3 V6 V8 87-90 50hp These were intended to be

These were intended to be used on the 12-3/4" diameter flywheels not the larger 14" flywheels (Found on 1998 & later models)

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)

You will receive a single just like what you see as pictured

MerCruiser 73483T Water Pump Pulley (3-Groove) Replaces / Equivalent to MerCruiser 65608

OMC 984979 0984979 Cobra Lower Unit Gearcase Empty Housing 333857-D3 V6 V8 87-90 50hp These were intended to bePart Number(s) Included OMC Cobra 984979 0984979 4 3 4" Lower Unit Gearcase (EMPTY HOUSING) Stamped 333857 D1 (also commonly stamped 333857 D3) General Application Compatibility This would have been found on all "baby king" (standard) OMC V6 & V8 applications 1987 1990 also the 1990 3. 0L applications GM 3. 0L 181 4cyl (1990 ONLY with big gearcase) GM 4. 3L 262 V6 (1987 1990) GM 5. 0L 305 V8 (1987 1988) Ford 5. 0L 302 V8 (1989 1990) Ford 5. 8L 351 V8