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Flow Directions in Engine Cooling Hoses

 Both early and B-series engines

-KWKloeber 2/2/2019


Coolant flow on earlier engines (e.g., M-25/XP/XPA)

M-25 cooling.jpg  Coolant flow schematic


    Seawater pump rotation


   Water heater connections




Coolant flow on the B-series engines (M-35B, XPB shown)

The basic coolant flow loops on the B-series are identical to the early engines except that some hoses are run in different locations. 

Front     Front 

Front quarter    Front quarter 

Port side     Port side 

Rear quarter     Rear quarter


    Water heater connections (M-25XPB shown in a C-34)