Flow directions in engine cooling hoses (both early and B-series engines)

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The top schematic indicates the engine coolant and raw water cooling water flow for earlier engines (M-25/XP/XPA, M35/A) engines.
The coolant loops on the B-series (M-25XPB, M-35B) are identical (bottom four pix,) except that the hoses are in somewhat different locations.

Cooling loop schematic for earler engines (e.g., M-25/XP/XPA)


M-25 cooling.jpg

Coolant flow on the B-series engines (M-25XPB shown)



Front Front

Front quarter Front quarter

Port side Port side

Rear quarter Rear quarter


--KWKloeber 2 February 2019