MerCruiser 3.0 MPI/TKS – 181 cid

135 HP inline 4-cylinder sterndrive — one of the most popular sterndrives on the planet.

The Mercury MerCruiser 3.0L is the ideal choice for runabouts up to 19 feet. It is available in two variants: a multiport fuel injected version (MPI) and a carbureted version (TKS).

135 HP / 99.3 kW Inline 4 3.0L / 181 cid 4400–4800 RPM WOT

Fuel Consumption (GPH)

Idle100015002000250030003500400045004800 WOT
0.51.01.52.93.84.86.27.49.310.510.5

Specifications

HP / kW135 / 99.3
Maximum RPM (WOT)4400 – 4800
Engine TypeInline 4
Displacement3.0L / 181 cid
Bore and Stroke4.00 x 3.60″ / 101 x 91 mm
Compression Ratio9.3:1
Recommended FuelUnleaded Regular 87 Octane Minimum (R+M/2) or 90 RON, 10% Ethanol Max
Engine Control SystemPCM 09 with SmartCraft CAN capability, OBD-M diagnostics, dual oxygen sensors
Fuel DeliveryMulti-point Electronic Fuel Injection (MPI) or 2V carb with turn-key start and electric fuel pump
Air InductionSingle piece iron intake with 56mm throttle body
IgnitionCrank fired high voltage switch with knock control
Alternator65 amp / 917 watt
Water DrainEZ Water Drain
ExhaustElectro-deposition paint coated iron manifold with dry joint elbow
CoolingRaw water
Accessory DriveSerpentine belt
Recommended OilNMMA Certified FCW 25W-40 Synthetic Blend
Dimensions (L x W x H)29 x 26 x 21″ / 730 x 660 x 533 mm
Weight (engine only)515 lbs / 234 kg
Compatible DrivesAlpha

Engine Guardian System

Knock Control
Low Drive Lubricant
Low Oil Pressure
Low Voltage
Low Water Pressure
Over-rev
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