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MerCruiser 3.0 MPI User Manual

MerCruiser 3.0 MPI
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Section 5 - Maintenance
90-899883272 MARCH 2008 Page 55
NOTE: Install the dipstick with the oil level indication marks facing the rear of the engine.
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3. Remove the dipstick and observe the oil level.
4. If the level is below the add mark, remove the oil fill cap and add the specified oil to
bring the level up to the OK range on the dipstick. Recheck the oil level as you fill the
system.
IMPORTANT: Do not overfill the engine with oil.
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Oil fill cap
Engine Model Capacity Fluid Type
3.0 MPI 3.8 L (4 US qt) Mercury Full‑Synthetic MerCruiser Oil 20W‑40
5. Replace the fill cap.
Changing Oil and Filter
See Maintenance Schedule for the change interval. Engine oil should be changed before
placing the boat in storage.
IMPORTANT: Change engine oil when the engine is warm from operation. Warm oil flows
more freely, carrying away more impurities. Use only recommended engine oil (refer to the
Specifications section).
Easy Engine Oil Drain System
NOTE: The boat must be out of water to perform this procedure.
1. Loosen the oil filter to vent the system.
2. Allow sufficient time for the oil to drain from the filter down into the engine block.
3. Remove the bilge drain plug.

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MerCruiser 3.0 MPI Specifications

General IconGeneral
Horsepower135 hp (101 kW)
IgnitionElectronic
Cylinders4
AspirationNaturally Aspirated
Compression Ratio9.3:1
Full Throttle RPM4400-4800 RPM
Displacement3.0L / 181 CID
Fuel SystemMulti-Port Injection (MPI)
Bore x Stroke4.00" x 3.60" (101.6mm x 91.4mm)
Fuel Requirement87 Octane Minimum
Engine TypeInline 4
Cooling SystemRaw water
Alternator Output65 amp

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