MerCruiser 3.0 MPI User Manual

Section 2 - Getting to Know Your Power Package
Page 20 90-899883272 MARCH 2008
Identification
The serial numbers are the manufacture's keys to numerous engineering details which
apply to your MerCruiser power package. When contacting MerCruiser about service,
always specify model and serial numbers.
Alpha Sterndrive Decal Identification
The Drive Serial No. is located on the port side of the alpha sterndrive.
The Drive Ratio is located on the starboard side of the alpha sterndrive.
b
a
25681
Alpha sterndrive
a - Drive gear ratio decal (starboard) b - Serial number decal (port)
Alpha Transom Serial Number
The transom serial number is located on the top of the transom assembly.
25619
Alpha transom assembly serial number

MerCruiser 3.0 MPI Specifications

General

Horsepower	135 hp (101 kW)
Ignition	Electronic
Cylinders	4
Aspiration	Naturally Aspirated
Compression Ratio	9.3:1
Full Throttle RPM	4400-4800 RPM
Displacement	3.0L / 181 CID
Fuel System	Multi-Port Injection (MPI)
Bore x Stroke	4.00" x 3.60" (101.6mm x 91.4mm)
Fuel Requirement	87 Octane Minimum
Engine Type	Inline 4
Cooling System	Raw water
Alternator Output	65 amp