MERCURY Sport JET 175 175XR Service Manual

1 A 28237 IMPORTANT INFORMATION SPECIFICATIONS

90-852396 MAY 1996 1A-0 - IMPORTANT INFORMATION Table Of Contents Page Master Specifications 1A-1 . . . . . . . . . . . . . . . . . . . . . Torque Chart 1A-3 . . . . . . . . . . . . . . . . . . . . . . . . . .

IMPORTANT INFORMATION - 1A-1 90-852396 MAY 1996 Master Specifications Model 175 HORSEPOWER (KW) 175(130.5) SPORT JET WEIGHT Powerhead Pump Unit 205 lb. (93 kg) 100 lb. (45 kg) CYLINDER BLOCK Type Displacement V-6 Cylinder, Two Cycle, Loop Charged 153.0 cu. in. (2507cc) STROKE Length (All Models) 2.650 in. (67.31mm) CYLINDER BORE Diameter (Std) Taper/Out of Round/Maximum Wear Bore Type 3.501 in. (88.925mm) 0.003 in. (0.076mm) Cast Iron PISTON Piston Type Standard 0.015 in. (0.381 mm) Oversize Aluminum 3.494 in. ± 0.001 in. (88.748mm ± 0.025mm) 3.509 in. ± 0.001 in. (89.129mm ± 0.025mm) REEDS Reed Type Reed Stand 0pen (Max.) Reed Stop (Max.) Steel 0.020 in. (0.50mm) Not Adjustable FUEL SYSTEM Fuel Recommended Gasoline Recommended Oil Gasoline/Oil Ratio Fuel Pressure – @ Idle – @ WOT Gasoline w/Oil Injection Unleaded 87 Octane Minimum Quicksilver TC-W3 or TC-WII 2 Cycle Outboard Oil Only 50:1 (25:1 Break-In) 2 PSI 8 PSI STARTING SYSTEM Electric Start – All Models Starter Draw (Under Load) Starter Load (No Load) Battery Rating 175 Amperes 40 Amperes 670 Marine Carnking Amps (MCA) or 520 Cold Cranking Amps (CCA) IGNITION SYSTEM Type Spark Plug Type Spark Plug Gap Capacitor Discharge NGK BU8H Surface Gap CHARGING SYSTEM Alternator Output (Regulated) 12 Amperes @ 3000 RPM

90-852396 MAY 1996 1A-2 - IMPORTANT INFORMATION Master Specifications (Continued) 175XR 2 Sport Jet (Continued) Carburetor Idle RPM Wide Open Throttle (WOT) RPM Idle Mixture Screw Adjustment (Preset - Turns Out) – All Carbs Float Setting Main Jet –Top Carb –Middle Carb –Bottom Carb Idle Air Jet –Top Carb –Middle Carb –Bottom Carb Vent Jet –Top Carb –Middle Carb –Bottom Carb 1000 - 1100 RPM 5000 - 5500 1-1/2 turns out from a lightly seated position Set parallel to body flange .076 .076 .076 .050 .050 Port .054 Starbboard .050 .080 .080 .080 Timing Maximum Timing BTDC @ Cranking Speed @ 5000 RPM Idle Timing ATDC Firing Order 22° BTDC 20° BTDC 0°  2° @ 1000 - 1100 RPM 1-2-3-4-5-6

IMPORTANT INFORMATION - 1A-3 90-852396 MAY 1996 Torque Chart Special Items Torque PUMP UNIT Impeller Nut 150 lb. ft. (203 N·m) Impeller Gear Nut 90 lb. ft. (122 N·m) Pinion Shaft Assembly 180 lb. in. (20 N·m) Drive Housing Cover Nuts 35 lb. ft. (47.5 N·m) Stator Bolts 35 lb. ft. (47.5 N·m) Nozzle to Stator Bolts 35 lb. ft. (47.5 N·m) Rudder Pivot Bolt 50 lb. ft. (68 N·m) Reverse Gate Pivot Bolt 50 lb. ft. (68 N·m) Steering Lever Screw 180 lb. in. (20.2 N·m) Reverse Gate Stop Screw 120 lb. in. (13.6 N·m) Inlet Screen Screw (6 mm) 75 lb. in. (8.5 N·m) Inlet Screen Screw (8 mm) 200 lb. in. (23 N·m) Ride Plate Screw 75 lb. in. (8.5 N·m) POWERHEAD Adaptor Plate to Powerhead 35 lb. ft. (47.5 N·m) Powerhead to Drive Housing Nuts 35 lb. ft. (47.5 N·m) Cylinder Head 225 lb. in. (25.4 N·m) Then Turn Additional 90_ Flywheel Nut 125 lb. ft. (169.5 N·m) Main Bearing Bolts 270 lb. in. (30.4 N·m) Connecting Rod Screws 120 lb. in. (13.6 N·m) Then Turn Additional 90_ Transfer Port Cover 80 lb. in. (9.03 N·m) Exhaust Manifold 180 lb. in. (20 N·m) Standard Hardware Screw or Nut Size Torque 6 - 32 9 lb. in. (1.0 N·m) 8 - 32 20 lb. in. (2.3 N·m) 10 - 24 30 lb. in. (3.4 N·m) 10 - 32 35 lb. in. (3.9 N·m) 12 - 24 45 lb. in. (5.0 N·m) 1/4 - 20 70 lb. in. (7.8 N·m) 5/16 - 18 160 lb. in. (18.1 N·m) 3/8 - 16 270 lb. in. (30.4 N·m) Metric Hardware A B Torque Specification A B lb. in. lb. ft. N·m 8 mm M5 36 3 4 10 mm M6 70 6 8 12 mm M8 156 13 18 14 mm M10 312 26 36 17 mm M12 372 31 42 A B

MERCURY Sport JET 175 175XR Service Manual

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