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Home / Outboard Engines / Mercury Engines / Mercury 150 XRI |
Mercury XRI 150 Maintenance
Engine Model: Mercury XRI 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 5600 rpm |
Fuel System: Electronic fuel injection (EFI) |
![](images/Mercury_150XRI.jpg)
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- Mercury 150 XRI Engine Specifications
- Mercury 150 XRI Engine Maintenance
- Mercury 150 XRI 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 .............. 1000-1100
Wide Open Throttle, rpm .............. 5000-5600
Ignition System |
Spark Plug Type .............. NGK BU8H, NGK BPZ8HS-10
Spark Plug Gap, in (mm) .............. 0.040 (1.0)
Maximum BTDC (Cranking Speed), deg .............. 22
Maximum BTDC (Wide Open Throttle), deg .............. 16
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 Divider Plate Bolts, Nm (ft-lb) .............. 22.6 (16.7)
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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