Sierra 18-3573 Circulating Water Pump

• Fits GM 8.1L 496 CID marine engines
• Pump is bi-directional
• Includes pump mounting gaskets
• Replaces Crusader RA057030
• Replaces Mercury 883925
• Replaces Volvo Penta 3861341
• Replaces Mallory 9-42601

Replaces OEM part # MERCURY MARINE 883925 All 8.1L big-block GM engines For engines with composite timing cover. NOTE:Circulating Water Pump for Mercruiser Stern Drive • Replaces: Mercury 883925 • For all 8.1L big-block GM engines OR engines with composite timing cover. For Assistance; Please Call Sierra's Tech Support at 1-877-663-8396