2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 202Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 202

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THEORY OF OPERATION
Fuel Cooler
The 225 EFI (4-Stroke) is equipped with fuel cooler that uses the engine cooling water to decrease the fuel temperature and reduce vaporsA brass pipe is use