861156A03 – High Pressure Fuel Cooler Kit – Mercury

861156A03 Fuel Cooler is a high pressure fuel cooling kit used on Mercury and Mercruiser engines. This assembly helps control fuel temperature in high pressure fuel systems.

Fuel coolers prevent fuel from overheating during engine operation. When fuel becomes too hot, pressure problems and vapor lock can occur. Therefore, a working cooler is important for correct fuel delivery.

This kit includes the fuel cooler body, fittings, and electric fuel pump assembly as shown. The cooler circulates fuel through a cooling chamber to keep temperature stable. Because of this, the engine runs smoother and more reliably.

A faulty cooler may cause hard starting, loss of power, or fuel pressure faults. In some cases, engines may stall under load. Replacing worn fuel cooling components helps restore proper performance.

This part suits various Mercury and Mercruiser EFI engines using part number 861156A03.

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