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| Home / Outboard Engines / Mercury Engines / Mercury 150 EFI |
Mercury EFI 150 Maintenance
| Engine Model: Mercury EFI 150 Hp |
| Engine Type: 2-cycle 6-cylinder gasoline outboard engine |
| Total Displacement: 153 cu.in (2507 cc) |
| Rated Engine Power: 150 Hp (111.8 kW) at 5750 rpm |
| Fuel System: Electronic fuel injection (EFI) |
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- Mercury 150 EFI Engine Specifications
- Mercury 150 EFI Engine Maintenance
- Mercury 150 EFI Engine Troubleshooting
| Fuel, Oil, Lubricant, and Filter |
Engine Fuel Type .............. Unleaded 87 octane minimum
Engine Oil Type .............. Quicksilver TC-W3 2-cycle outboard oil
Engine Oil Capacity, gal (L) .............. 3.0 (11.4)
Lubricant Type .............. Quicksilver gear lube premium blend
Gearcase Capacity, qts (L) .............. 0.71 (0.67)
Fuel Filter/Water Separator Part Number .............. 35-18458Q4
| Electronic Fuel Injection |
Idle Mixture Screw .............. Not Adjustable
Low Idle Speed, rpm .............. 625±50
Wide Open Throttle, rpm .............. 5250-5750
Injector Resistance, ohms .............. 12.3±0.5
Electric Fuel Pump Resistance, ohms .............. 0.7±0.3
Electric Fuel Pump Amperage Draw, ohms .............. 4±0.5
| Ignition System |
Spark Plug Type .............. NGK BPZ8HS-10
Spark Plug Gap, in (mm) .............. 0.040 (1.0)
Idle Timing .............. Not adjustable, controlled by ECM
Maximum Timing .............. Not adjustable, controlled by ECM
Throttle Position Sensor .............. Not adjustable, controlled by ECM
| Service Intervals |
Lubricate all lubrication points .............. Every 100 hours
Inspect and clean spark plugs .............. Every 100 hours
Check fuel filter/water separator .............. Every 100 hours
Check carburetor adjustments .............. Every 100 hours
Check corrosion control anodes .............. Every 100 hours
Drain and replace gear case lubricant .............. Every 100 hours
Lubricate splines on the drive shaft .............. Every 100 hours
Inspect battery condition .............. Every 100 hours
Check EFI electrical system and ECM .............. Every 100 hours
Check final fuel filter .............. Every 100 hours
Check induction manifold leak .............. Every 100 hours
Check power trim fluid .............. Every 100 hours
Check and adjust carburetor .............. Every 100 hours
Check engine timing setup .............. Every 100 hours
Check control cable adjustments .............. Every 100 hours
Check tightness of bolts, nuts, and other fasteners .............. Every 100 hours
Replace water pump impeller .............. Every 100 hours
Replace fuel filter/water separator .............. Every 300 hours
| Tightening Torques |
Cylinder Block Cover Screw, Nm (ft-lb) .............. 23.5 (17.5)
Crankcase Cover Bolts, Nm (ft-lb) .............. 51.5 (38)
Exhaust Cover Bolts, Nm (ft-lb) .............. 20.3 (15)
Cylinder Head Bolts, Nm (ft-lb) .............. 40.5 (30)
Connecting Rod Bolts, Nm (ft-lb) .............. 40.5 (30)
Crankcase Cover Bolts, Nm (ft-lb) .............. 17 (12.6)
Fuel Pump Screw, Nm (ft-lb) .............. 8.1 (6.1)
Thermostat Screw, Nm (ft-lb) .............. 22.5 (16.5)
Crankshaft Drive Gear Screw, Nm (ft-lb) .............. 1.0 (0.75)
Steering Link Assembly, Nm (ft-lb) .............. 27 (20)
Drive Shaft Housing Nut, Nm (ft-lb) .............. 65 (48)
Gear Housing Screw, Nm (ft-lb) .............. 7 (5)
Electric Fuel Pump to Separator Cover, Nm (ft-lb) .............. 1.35 (1.0)
Separator Cover to Separator Tank, Nm (ft-lb) .............. 2.5 (1.9)
Induction Manifold Assembly to Engine, Nm (ft-lb) .............. 10 (7.5)
Oil Reservoir to Engine, Nm (ft-lb) .............. 3 (2.2)
Propeller Nut, Nm (ft-lb) .............. 75 (55)
Spark Plug, Nm (ft-lb) .............. 27 (20)
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| Engines Technical Specifications |