• Constructed of 316L Stainless steel and billet aluminum water crossover.
• Allows for the removal of the factory power robbing circulating pump.
• Offers an optional cooling system bypass port as well as a single inlet.
• Fits HP500 only
• Includes pulley for HP500 Mercury engines. Use 625-4452 if you already have pulley
• O-ring sealed, no gaskets required.
• Includes mounting bolts.
• Multiple plumbing options from three 1" NPT ports.
• Includes one 1" NPT x 1-1/4" Hose fitting and two 1" NPT pipe plugs.

• Constructed of 316L stainless steel and billet aluminum water crossover.
• Offers a optional cooling system bypass port as well as a single inlet.
• No pulley included.
• Kits available for all popular HP Mercury engines including the 500, 525, 600, and 700's.
• O-ring sealed, no gaskets required.
• Includes mounting bolts.
• Multiple plumbing options from three 1" NPT ports.
• Includes one 1" NPT x 1-1/4" Hose fitting and two 1" NPT pipe plugs.
• Allows for the removal of the factory power robbing circulating pump.

• Constructed of 316L stainless steel and billet aluminum.
• Offers a optional cooling system bypass port as well as a single inlet.
• Includes pulley for 454/502 Mag applications.
• This model ONLY fits 454/502
• Other models available for popular HP Mercury engines including the 500, 525, 600, and 700's.
• O-ring sealed, no gaskets required.
• Includes mounting bolts.
• Multiple plumbing options from three 1" NPT ports.
• Includes one 1" NPT x 1-1/4" Hose fitting and two 1" NPT pipe plugs.
• Allows for the removal of the factory power robbing circulating pump.

Propshaft Mercruiser 44-840377T

Supersedes: 44-840377

Supercedes: 44-840377

PROPELLER SHAFT Mercruiser 44-952911.

PROPSHAFT Mercruiser 44-195133.

Supersedes: 44-16148, 44-19513

PROPSHAFT Mercruiser 44-8M0051204.

Supercedes: 44-844185, 44-841979

PROPSHAFT Mercruiser 44-41370.

PROP SHAFT Mercruiser 44-8M0070782.

Supercedes: 44-8037441, 44-803744002