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Volvo Penta MD17C Engine

General Technical Data

Engine Specifications

Engine Model ............... Volvo Penta MD17C
Engine Type ............... 4-cycle inline 3-cylinder direct injection liquid-cooled marine diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line vertical
Engine Bore, in (mm) ............... 3.50 (88.9)
Engine Stroke, in (mm) ............... 3.54 (90.0)
Displacement, cu.in (L) ............... 102.5 (1.68)
Crankshaft Power Output, hp (kW) ............... 35 (25.7) at 2500 rpm
Heavy Duty Rating Power, hp (kW) ............... 30 (22.1) at 2300 rpm
Maximum Overspeed Limit, rpm ............... 2800
Idling Speed Range, rpm ............... 650-780
Aspiration Type ............... Naturally aspirated atmospheric intake
Compression Ratio ............... 17.5:1
Firing Order ............... 1-2-3
Direction of Crankshaft Rotation ............... Clockwise when viewed from front of engine
Flywheel Rotation ............... Counter-clockwise when viewed from flywheel end
Cylinder Block Material ............... High-grade cast iron alloy with integrated crankcase
Cylinder Head Material ............... Cast iron individual heads for each cylinder
Cylinder Liner Type ............... Wet replaceable cast iron liners
Number of Main Bearings ............... 4 journal bearings supporting the crankshaft
Combustion Chamber ............... Direct injection open chamber inside piston crown
Valves Per Cylinder ............... 1 inlet valve and 1 exhaust valve
Valve Mechanism Type ............... Overhead valves operated by pushrods and rocker arms
Camshaft Drive Method ............... Gear-driven train via timing gears from crankshaft
Lubrication Method ............... Full pressure circulation system by internal pump
Cooling Water Type ............... Direct raw water cooling or optional fresh water heat exchanger
Sea Water Pump Impeller Type ............... Flexible neoprene rubber blade slide-in unit
Sea Water Pump Drive ............... Gear-driven direct engagement off camshaft front face
Electrical System, V ............... 12
Alternator Output, A ............... 35 or 50

Fuel System

Fuel Injection Pump Manufacturer ............... Bosch inline multi-plunger system
Injection Pump Type ............... Flange-mounted cam-driven mechanical pump
Fuel Feed Pump Type ............... Mechanical diaphragm lift pump driven by camshaft plunger
Fuel Feed Pump Delivery Pressure, psi (kPa) ............... 8.5-11.4 (59-79)
Fuel Injector Holder Manufacturer ............... Bosch mechanical nozzle holder assemblies
Fuel Injector Nozzle Type ............... Multi-hole spray nozzle tip
Injector Opening Injection Pressure, psi (bar) ............... 2610-2726 (180-188)
Fuel Injection Timing Advance, degrees BTDC ............... 24-26 before top dead center
Governor Type ............... Centrifugal mechanical flyweight governor integrated into timing gear
Fuel Filter Type ............... Spin-on fine paper element cartridge with water separator bowl
Primary Fuel Filter Micron Rating, microns ............... 10 nominal filtering capability
Secondary Engine Fuel Filter Micron Rating, microns ............... 5 high efficiency element
Maximum Permissible Fuel Return Line Flow Restriction, in Hg (kPa) ............... 5.9 (20)
Fuel Injection Pipe Dimensions, in (mm) ............... 0.236 x 0.078 (6.0 x 2.0) high pressure steel
Recommended Fuel Grade ............... Marine gasoil standard diesel fuel oil number 2-D
Fuel Tank Supply Height Limit, ft (m) ............... 4.9 (1.5) maximum suction elevation
Cold Start Device Type ............... Automatic mechanical enrichment mechanism inside governor

Dimensions and Weight

Overall Length with MS Gearbox, in (mm) ............... 36.4 (925)
Overall Width, in (mm) ............... 20.6 (525)
Overall Height, in (mm) ............... 26.9 (685)
Dry Weight without Marine Gear, lbs (kg) ............... 595 (270)
Dry Weight with MS Marine Reverse Gear, lbs (kg) ............... 672 (305)
Dry Weight with 110S Saildrive Unit, lbs (kg) ............... 705 (320)

Maintenance Data

Service Information

Oil Pressure at Rated Speed, psi (bar) ............... 51-65 (3.5-4.5)
Oil Pressure at Low Idling, psi (bar) ............... 11.4 (0.8)
Thermostat Opening Temperature (SeaWater), F (C) ............... 140 (60)
Thermostat Fully Open Temperature (SeaWater), F (C) ............... 165 (74)
Thermostat Opening Temperature (FreshWater), F (C) ............... 167 (75)
Thermostat Fully Open Temperature (FreshWater), F (C) ............... 190 (88)
Alternator Drive Belt Deflection Tension, in (mm) ............... 0.39 (10.0)
Intake Valve Clearance, in (mm) ............... 0.010-0.012 (0.25-0.30)
Exhaust Valve Clearance, in (mm) ............... 0.012-0.014 (0.30-0.35)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40
API Service Classifications ......................... CD or higher
Engine Oil Capacity Excluding Filter, qt (L) ............... 5.0 (4.75)
Engine Oil Capacity Including Filter, qt (L) ............... 5.8 (5.5)
Transmission Oil Capacity, MS Gearbox, qt (L) ............... 0.63 (0.6)
Saildrive 110S Oil Capacity, qt (L) ............... 1.9 (1.8)
Cooling System Capacity with Heat Exchanger, qt (L) ............... 7.4 (7.0)

Service Intervals

Change engine oil ............... Every 50 hours
Change oil in reverse gear............... Every 50 hours
Replace oil filter ............... Every 100 hours
Service air filter ............... Every 50 hours
Inspect seawater cooling ............... Every 100 hours
Valve-lash adjustment ............... Every 100 hours
Check fuel system ............... Every 100 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inner Diameter, in (mm) ............... 3.5000-3.5006 (88.900-88.915)
Connecting Rod Journal Clearance, in (mm) ............... 0.0013-0.0029 (0.034-0.074)
Connecting Rod Axial End Play, in (mm) ............... 0.006-0.010 (0.15-0.25)
Main Bearing Journal Clearance, in (mm) ............... 0.0015-0.0033 (0.040-0.084)
Crankpin Journal Diameter, in (mm) ............... 2.1236-2.1242 (53.942-53.955)
Main Bearing Journal Diameter, in (mm) ............... 2.5173-2.5180 (63.942-63.955)
Crankshaft Thrust End Play, in (mm) ............... 0.0031-0.0078 (0.080-0.200)
Piston Skirt Outer Diameter, in (mm) ............... 3.4964-3.4970 (88.810-88.825)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0031-0.0041 (0.080-0.105)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0001-0.0003 (0.003-0.009)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0006-0.0011 (0.015-0.028)
Top Ring Groove Clearance, in (mm) ............... 0.0027-0.0040 (0.070-0.102)
Second Ring Groove Clearance, in (mm) ............... 0.0019-0.0032 (0.048-0.082)
Oil Ring Groove Clearance, in (mm) ............... 0.0015-0.0027 (0.038-0.068)
Top Ring End Gap, in (mm) ............... 0.011-0.017 (0.30-0.45)
Second Ring End Gap, in (mm) ............... 0.011-0.017 (0.30-0.45)
Oil Ring End Gap, in (mm) ............... 0.009-0.015 (0.25-0.40)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.3130-0.3137 (7.950-7.967)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.3118-0.3126 (7.920-7.940)
Intake Valve Stem to Valve Guide Clearance, in (mm) ............... 0.0010-0.0021 (0.025-0.055)
Exhaust Valve Stem to Valve Guide Clearance, in (mm) ............... 0.0021-0.0033 (0.055-0.085)
Valve Seat Angle, degrees ............... 45
Valve Face Angle, degrees ............... 44.5
Valve Springs Free Length, in (mm) ............... 1.838 (46.7)
Camshaft Bearing Journal Diameter, in (mm) ............... 1.847-1.848 (46.92-46.95)
Camshaft Journal Clearance, in (mm) ............... 0.0019-0.0035 (0.050-0.090)
Camshaft Axial End Play, in (mm) ............... 0.0020-0.0059 (0.050-0.150)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.788 (20.02)
Rocker Arm Radial Bushing Clearance, in (mm) ............... 0.0006-0.0023 (0.015-0.060)

Tightening Torques

Cylinder Head Nuts (Stage One), lb-ft (Nm) ............... 22 (30)
Cylinder Head Nuts (Stage Two), lb-ft (Nm) ............... 59 (80)
Cylinder Head Nuts (Final Stage), lb-ft (Nm) ............... 81 (110)
Crankshaft Flywheel Nut, lb-ft (Nm) ............... 369 (500)
Connecting Rod Cap Screws, lb-ft (Nm) ............... 48 (65)
Main Bearing Cap Stud Nuts, lb-ft (Nm) ............... 96 (130)
Crankshaft Front Timing Gear Nut, lb-ft (Nm) ............... 110 (150)
Fuel Injector Clamp Flange Nuts, lb-ft (Nm) ............... 15 (20)
Fuel Delivery Valve Holder Nut, lb-ft (Nm) ............... 33 (45)
Fuel Pump Housing Mounting Nuts, lb-ft (Nm) ............... 18 (24)
Camshaft Thrust Plate Fasteners, lb-ft (Nm) ............... 18 (24)
Oil Pan Sump Drain Plug, lb-ft (Nm) ............... 44 (60)
Cylinder Block Oil Pan Flange Screws, lb-ft (Nm) ............... 7.3 (10)
Rocker Shaft Support Bracket Nuts, lb-ft (Nm) ............... 35 (48)
Rocker Arm Cover Top Cap Nuts, lb-ft (Nm) ............... 18 (24)
Exhaust Manifold Collector Pipe Nuts, lb-ft (Nm) ............... 35 (48)
Intake Manifold Mounting Clamp Screws, lb-ft (Nm) ............... 18 (24)
Flywheel Housing to Block Bolts (M10), lb-ft (Nm) ............... 35 (48)
Flywheel Housing to Block Bolts (M12), lb-ft (Nm) ............... 63 (85)
Timing Gear Case Cover Face Screws, lb-ft (Nm) ............... 18 (24)
Sea Water Pump Drive Housing Screws, lb-ft (Nm) ............... 15 (20)
Starter Motor Frame Mounting Screws, lb-ft (Nm) ............... 33 (45)
Alternator Pivot Adjustment Support Bolts, lb-ft (Nm) ............... 26 (35)
Oil Pressure Switch Sender Unit, lb-ft (Nm) ............... 11 (15)
Coolant Thermostat Housing Cap Fasteners, lb-ft (Nm) ............... 18 (24)
Fuel Feed Lift Pump Flange Nuts, lb-ft (Nm) ............... 15 (20)

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