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Mercury 850399 Marine Circulating Water Pump Assembly - Image 1
Mercury 850399 Marine Circulating Water Pump Assembly - Image 2
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Mercury 850399 Marine Circulating Water Pump Assembly


Pump TypeEngine Circulating Water Pump
Impeller MaterialBrass
Impeller RotationBi-Directional
Back Plate MaterialStainless Steel
Timing Cover CompatibilityStamped Steel or Composite
Inlet/Outlet ConfigurationDirect OEM Mount
Gasket IncludedYes
Superseded Part Number8M0113734
Manufacturer No.
85039985039918M0113734807729T
OEM Part No.
174376065881184185039985039918M01137343853850985429980477382218383953835390-6856364-583539068563645RA057018
Engine Part No.
GM 4.3L V6 (262 cid)GM 5.0L V8 (305 cid)GM 5.7L V8 (350 cid)GM 6.2L V8 (377 cid)
Interchange No.
18-358318-359918-3599-1183583183599203187142520FI1101208FI1100742FI110129254793152019-426065510451743164399RA057027
Fitment Vehicles
MerCruiser Alpha One Gen IIMerCruiser Bravo OneMerCruiser Bravo TwoMerCruiser Bravo ThreeOMC Sterndrive V8Volvo Penta AQ/V8 SeriesCrusader Marine EnginesIndmar Marine EnginesMarine Power EnginesPleasurecraft Marine Engines

Cooling System - Industrial Encyclopedia

OEM replacement circulating water pump for MerCruiser, OMC, Volvo Penta GM small block V6 4.3L and V8 5.0L 5.7L marine engines. Brass bi-directional impeller, stainless steel backing plate.