2 Stroke Outboard Lower Unit Assy 63V-45300-03-4D for YAMAHA 9.9/15fmh Outboard Engine

Certification: ISO9001 factory production; CE documents available upon request

Real Product Photos: Lower unit full exterior view, sealing‑surface close‑up, outboard powertrain matching reference picture

This heavy‑duty aftermarket lower unit assembly serves as a practical drop‑in swap for YAMAHA 9.9FMH and 15FMH two‑stroke marine outboard engines. It is built to match OEM part number 63V‑45300‑03‑4D.

It gets cast from high‑strength marine‑grade aluminum alloy. This complete gearcase unit features solid structural toughness and decent impact tolerance. It also delivers dependable salt‑water corrosion resistance to handle continuous water spray and partial submersion in real‑world marine scenarios.

This assembly works as the full lower unit of your outboard motor. It houses forward‑reverse gear groups, propeller shaft, water pump components and other critical transmission hardware. It holds all moving parts in proper alignment, while sealing gear‑oil inside the gearcase during on‑water running.

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