Being an GXI of your year, Should make it be 320 HP,
Service Bulletin - Marine Mechanic
http://www.boat-fuel-economy.com/volvo-penta-5.7-gxi-v8-320-fuel-consumption-liters
Engine . . . . . . . . . . . . . . . . . . 5.7Gi-A, 5.7Gi-B(F), 5.7GXi-B, 5.7GXi-C(F) Bore and stroke . . . . . . . . . . . . . . . . . 4.000 x 3.480 inches (101.60 x 88.39 mm) Cylinders (number) . . . . . . . . . . . . . . 90? V-8 Displacement . . . . . . . . . . . . . . . . . . 5.7 liters (350 cubic inches) Firing order . . . . . . . . . . . . . . . . . . . . 1 ? 8 ? 4 ? 3 ? 6 ? 5 ? 7 ? 2 Full throttle operating range . . . . . . . Gi/GXi: 4600 ? 5000 RPM Idle RPM (fixed) . . . . . . . . . . . . . . . . Gi/GXi: 600 RPM Fuel System GXi-A . . . . . . . . . . . . . . . . . . . . . . . . Throttle body injection GXi-B . . . . . . . . . . . . . . . . . . . . . . . . Port injection Fuel pumps . . . . . . . . . . . . . . . . . . . . Electric Fuel filter . . . . . . . . . . . . . . . . . . . . . . Volvo Penta Part no. 3852413 Fuel filter location . . . . . . . . . . . . . . . Refer to photographs on features pages. Fuel type . . . . . . . . . . . . . . . . . . . . . . Inside the U.S.: 89 octane (AKI) unleaded gasoline Outside the U.S.: 93 octane (RON) unleaded gasoline Electrical System Charging system . . . . . . . . . . . . . . . . 12 volt 65 amp alternator, with internal transistorized voltage regulator Battery size . . . . . . . . . . . . . . . . . . . . 12 volt with 650 Cold Cranking Amp (CCA) rating (135 minute reserve capacity) CAUTION! Do not use a deep cycle battery as the start battery. Starter . . . . . . . . . . . . . . . . . . . . . . . . 12 volt 1.7kW output, planetary reduction gear Ignition System Distributor . . . . . . . . . . . . . . . . . . . . . Delco EST Ignition timing . . . . . . . . . . . . . . . . . . Gi-A / GXi-B: 8? BTDC service mode required Gi-B / GXi-C: 10?BTDC service mode required Spark plugs . . . . . . . . . . . . . . . . . . . . Volvo Penta Part no. 3861632 Spark plug gap . . . . . . . . . . . . . . . . . 1.52 mm (0.060 inches) Spark plug installation torque . . . . . . 27 N?m (20 ft. lb.) Cooling system Raw water pump . . . . . . . . . . . . . . . . Crankshaft mounted variable volume flexible impeller pump Recirculating pump . . . . . . . . . . . . . . Fixed impeller belt driven pump on engine Thermostat . . . . . . . . . . . . . . . . . . . . 71?C (160?F) Volvo Penta part no. 3856961 Gi-BF / GXi-CF . . . . . . . . . . . . . . . . . Closed cooling heat exchanger mounted on engine. Thermostat . . . . . . . . . . . . . . . . . . . . 76?C (170?F) Volvo Penta Part no. 875788 Oil capacity Engine without filter . . . . . . . . . . . . . 5 quarts (4.7 liters) Engine with filter . . . . . . . . . . . . . . . . 6 quarts (5.7 liters) Drive unit SX . . . . . . . . . . . . . . . . . . . 2.2 quarts (2.1 liters) Drive unit DP-S . . . . . . . . . . . . . . . . . 2.5 quarts (2.4 liters) Oil filter . . . . . . . . . . . . . . . . . . . . . . . Volvo Penta Part no. 3850559 Oil filter location . . . . . . . . . . . . . . . . Refer to photographs on features pages. Oil type Engine . . . . . . . . . . . . . . . . . . . . . . . . DuraPlus? Heavy Duty Synthetic engine oil, or suitable pure synthetic oil altenative with the minimum API service raing SJ Drive unit . . . . . . . . . . . . . . . . . . . . . . DuraPlus SAE 75W/90 API service GL 5 synthetic gear oil Power steering fluid U.S. . . . . . . . . . DuraPlus power steering fluid Part no. 3851039 Power steering fluid non-U.S. . . . . . . ATF oil Dexron 2 Part no. 1161941
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