The MerCruiser 5.0 EFI is a boat engine manufactured by Mercury Marine, an American company that was founded in 1939. Currently a division of the Brunswick Corporation of Lake Forest, Illinois, Mercury Marine has over 4,100 employees worldwide and is headquartered in Fond du Lac, Wisconsin.

1

Engine Performance Specs

The MerCruiser 5.0 EFI is a fuel-injected, 4-cycle, 8-cylinder, gasoline-powered engine with a displacement of 5.0 litres (305 cubic inches). At 2,000 RPM, it delivers 240 horsepower to the propeller shaft with a maximum revolutions per minute (rpm) of 4,800 at wide open throttle (WOT).

2

Engine Electrical Specs

The electrical system is a 12-volt, negative ground system. The alternator generates 72 cold cranking amps (CCA) and 65 hot operating amps. The recommend battery for this engine is a marine battery with 550 CCA and a rated output of 170 amps per hour.

3

Engine Technical Specs

The firing order of the cylinders is as follows: 1-8-4-3-6-5-7-2. At 2000rpm, the oil pump delivers 13.6 to 27.2 Kilogram per square inch (PSI) of oil pressure and a minimum of 4 PSI at idle (600rpm). Normal operating temperature is 71.1 degrees C regulated by a thermostat. Ignition timing is 8 degrees before top dead centre (BTDC).

  • The firing order of the cylinders is as follows: 1-8-4-3-6-5-7-2.
  • Normal operating temperature is 71.1 degrees C regulated by a thermostat.