1 years
China
Certification: ISO9001 factory production; CE documents available upon request
Real Product Photos: Lower casing assembly full exterior view, sealing‑surface close‑up, outboard lower‑unit reference picture
This heavy‑duty aftermarket short‑shaft lower casing assembly serves as a direct‑fit housing for Yamaha 9.9HP and 15HP marine outboard motors. It matches OEM part number 63V‑45300‑03‑4D.
Cast from high‑strength marine‑grade aluminum alloy, this gearcase housing features solid structural rigidity and good impact resistance. It also brings reliable salt‑water corrosion resistance to handle long‑term spray and partial submersion in typical boating environments.
It forms the outer shell of the outboard lower unit. This casing holds forward‑reverse gear sets, propeller shaft, water pump hardware and other internal transmission components. It keeps all moving parts properly positioned, while maintaining a tight seal to retain gear‑oil inside the gearcase during on‑water operation.
Built strictly to original OEM specifications, this replacement casing ensures accurate mounting‑hole layout and flat sealing faces. It resolves common lower‑unit troubles including cracked housing, persistent gear‑oil leaks and uneven component seating. Such defects usually result from underwater strikes or long‑term galvanic corrosion on original factory casings.
All critical dimensions comply with OEM requirements. Users can complete quick drop‑in installation without trimming or extra adjustments. Thoroughly flush sand and metal fragments from inner cavities prior to fitting. Inspect all gasket contact surfaces, and follow service manual guidance for proper gear‑oil volume after assembly.
Swap your cracked, punctured or heavily corroded factory lower casing with this aftermarket unit. You will restore solid gear‑case protection and correct internal‑component alignment for your outboard. Stick to regular marine maintenance routines. These practical steps extend gearcase service life and maintain stable power output while running on the water.
Application:
Lower Casing Assy short shaft for Yamaha 2 stroke 9.9 15HP outboard motor
short shaft Lower Casing Assy for Parsun 2 stroke 9.9HP 15HP boat engine
short shaft Lower Casing Assy for Hidea 2 stroke 9.9HP 15HP outboard motor
2001 15MSHKZ LOWER CASING DRIVE 1
2001 15MSHZ LOWER CASING DRIVE 1
2001 9.9MSHKZ LOWER CASING DRIVE 1
2001 9.9MSHZ LOWER CASING DRIVE 1
2002 15MSHA LOWER CASING DRIVE 1
2002 9.9MSHA LOWER CASING DRIVE 1
2003 15MSHB LOWER CASING DRIVE 1
2003 9.9MSHB LOWER CASING DRIVE 1
2004 15MSHC LOWER CASING DRIVE 1
2004 9.9MSHC LOWER CASING DRIVE 1
2005 15FMHS LOWER CASING DRIVE 1
2005 15MSHD LOWER CASING DRIVE 1
2005 9.9FMHS LOWER CASING DRIVE 1
2005 9.9MSHD LOWER CASING DRIVE 1
2006 and Later 15MSH LOWER CASING DRIVE 1
2006 and Later 9.9MSH LOWER CASING DRIVE 1