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Home / Outboard Engines / Mercury Engines / Mercury 150 XRI

Mercury XRI 150 Specifications

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)

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General Technical Data

Engine Model .............. Mercury XRI 150 Hp
Engine Type .............. 2-stroke 6-cylinder gasoline outboard engine
Number of Cylinders .............. Six
Displacement, cu.in (cc) .............. 153 (2507)
Cylinder Bore, in (mm) .............. 3.50 (88.9)
Piston Stroke, in (mm) .............. 2.65 (67.3)
Maximum Engine Power, hp (kW) .............. 150.0 (111.8)
Maximum Engine Speed, rpm .............. 5000-5600
Idle Speed, rpm .............. 650±50
Firing Order .............. 1-2-3-4-5-6
Oil Injection Pump .............. variable metering pump
Ignition System .............. Capacitor discharge
Starting System .............. Manual Start / Electric Start
Electrical System Rating, Volts .............. 12
Charging System .............. Alternator
Alternator Rating, Amps .............. 40
Outboard Weight, lbs (kg) .............. 410 (186)

Fuel System

Fuel System Type .............. Electronic fuel injection (EFI)
Number of Injectors .............. 6
Fuel Pump Type .............. Pulse
Fuel Filter Type .............. Water separator
Engine Control .............. Electronic
Fuel Type .............. Gasoline with oil injection
Recommended Gasoline .............. Unleaded gasoline (87 octane minimum)
Recommended Oil .............. Quicksilver or Mercury Precision Lubricants TC-W3
Operating Fuel/Oil Ratio .............. 50:1
Injector Line Pressure, psi (kPa) .............. 34-36 (233-247)
Fuel Pressure (Idle Speed), psi (kPa) .............. 2 (13.7)
Fuel Pressure (Wide Open Throttle), psi (bar) .............. 8 (54.8)

Gear Housing

Gear Ratio (Standard) .............. 1.87:1
Gear Ratio (High Altitude) .............. 2.00:1
Number of Teeth (Forward Gear, 1.87:1 Ratio) .............. 28
Number of Teeth (Reverse Gear, 1.87:1 Ratio) .............. 14
Number of Teeth (Forward Gear, 2.00:1 Ratio) .............. 28
Number of Teeth (Reverse Gear, 2.00:1 Ratio) .............. 15
Pinion Height, in (mm) .............. 0.025 (0.64)
Forward Gear Backlash (1.87:1 Ratio), in (mm) .............. 0.018-0.027 (0.460-0.686)
Forward Gear Backlash (2.00:1 Ratio), in (mm) .............. 0.015-0.022 (0.381-0.558)
Reverse Gear Backlash, in (mm) .............. 0.030-0.050 (0.762-1.27)
Water Pressure / RPM, psi (kPa) .............. 12 (82.2) / 2000

Mid Section

Transom Height (Short Shaft), in (mm) .............. 15 (380)
Transom Height (Long Shaft), in (mm) .............. 20 (510)
Power Trim (Total Tilt Range), deg .............. 75
Power Trim (Tilt Range), deg .............. 20
Tilt Pin Adjustment Positions .............. 5
Steering Pivot Range, deg .............. 60
Allowable Transom Thickness (Max), in (mm) .............. 2.37 (60.3)

Cylinder Block

Cylinder Block Type .............. V6, 2-cycle, loop charged
Cylinder Bore Type .............. Cast iron
Cylinder Compression, psi (kPa) .............. 110-135 (753-925)
Cylinder Bore Inside Diameter (Std), in (mm) .............. 3.501 (88.925)
Cylinder Bore Inside Diameter (Max), in (mm) .............. 3.503 (88.975)
Cylinder Bore (Max Out of Round), in (mm) .............. 0.003 (0.076)
Cylinder Bore (Max Taper), in (mm) .............. 0.003 (0.076)
Crankshart Runout (Maximum), in (mm) .............. 0.006 (0.152)
Piston Type .............. Aluminum
Piston Outside Diameter (Std), in (mm) .............. 3.494 (88.748)
Piston Outside Diameter (Wear Limit), in (mm) .............. 3.492 (88.697)
Reed Type .............. Steel
Reed Stand Open (Maximum), in (mm) .............. 0.02 (0.50)
Reed Stop .............. Not Adjustable

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