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

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The top four indicate the engine coolant and raw water cooling water flow for the B-series M-25XPB, M-35B engines.

The coolant loops on the earlier engines (M-25/XP/XPA, M35/A) are identical (bottom schematic,) except that the hoses are in somewhat different locations.

Coolant Loops for B engines (M-25XPB shown)



Front Front

Front quarter Front quarter

Port side Port side

Rear quarter Rear quarter

Cooling loops for earler engines


M-25 cooling.jpg


--KWKloeber 2 February 2019