Posted : 21 Sep 09 12:50

• Check latest Mercury Service Bulletins.

• Install .0002" larger jets in carburetors.

• Max timing should be retarded 2 degrees.

• Remove advance box if installed.

• Remove idle stabilizer if installed.

• Rebuild carburetors and fuel pump.

• Retorque heads to 40 ft/lbs.

• After 1 hour running, allow engine to cool and recheck torque. Retorque to factory specs if necessary.

• Crowley Marine suggests removing oil injection system.

• If oil injection is used, replace 2 PSI oil valve and check oil pump bushing and seal.

• Clean and refill oil tanks with TCW-3 oil.

• Verify oil comsumption during break-in by marking the oil tank level.

• Check overheat alarm system and horn.

• On 2.5 EFI engines, fuel pressure should be 39 lbs. minimum.

• 2.5 EFI engines may have as many as 7 fuel filters, remove the cone shaped filter inline below the electric pump.

• Use newest style head gaskets and replace every year to prevent failure.

• Replace water pump impeller and gasket every year to prevent head gasket failure.

• Use 92-94 octane premium fuel.

Carefully following these instructions will aid in the proper assembly & break-in of your Mercury V6 engine

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Eric Schmidt (Eric@crowleymarine.com)
 Crowley Marine1401 Ulster St.Denver, CO 80220 303-355-555