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| Home / Outboard Engines / Suzuki Engines / Suzuki DF15 |
Suzuki DF15 Specifications
The Suzuki DF15 is a 4-stroke 2-cylinder SOHC (overhead cam) gasoline outboard engine with a rated power of 15 hp (11 kW) at 5400-6000 rpm. The engine cylinder bore is 2.28" (58 mm) and piston stroke is 2.24" (57 mm). A 18.4 cubic inches (302 cc) outboard motor has a carburetor fuel system, wet sump lubrication by trochoid pump, starting system with recoil or electric starter, pointless electronic ignition system, manual tilt and tiller handle or remote control steering. The fuel tank capacity is 3.2 gal (12 liters). The propeller is made of aluminum and it has three blades.
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| General Technical Data |
Engine Model ................ Suzuki DF15, DF15E, DF15R
Engine Type ................ 4-stroke two-cylinder SOHC gasoline outboard engine
Number of Cylinders ................ 2
Displacement, cu.in (cc) ................ 18.4 (302)
Cylinder Bore, in (mm) ................ 2.28 (58.0)
Piston Stroke, in (mm) ................ 2.24 (57.0)
Maximum Engine Power, hp (kW) ................ 15.0 (11.0)
Maximum Engine Speed, rpm ................ 5400-6000
Idle Speed, rpm ................ 900±50
Compression Ratio ................ 9.0:1
Lubrication System ................ Wet sump by trochoid pump
Exhaust System ................ Through prop
Cooling System ................ Water-cooled
Ignition System ................ Pointless electronic ignition (PEI)
Starting System ................ Recoil or electric
Choke System ................ Manual or automatic
Throttle Control ................ Twist grip or remote control
Electrical System Rating, Volts ................ 12
| Dimensions and Weight |
Overall Length, in (mm) ................ 26.3 (668.0)
Overall Width, in (mm) ................ 12.7 (323.0)
Overall Height (Long Shaft), in (mm) ................ 48 (1220.0)
Overall Height (Short Shaft), in (mm) ................ 43.1 (1095.0)
Transom Height (Long Shaft), in (mm) ................ 20 (508)
Transom Height (Short Shaft), in (mm) ................ 15 (381)
Outboard Weight (Long Shaft with Recoil Starter), lbs (kg) ................99.0 (45.0)
Outboard Weight (Long Shaft with Electric Starter), lbs (kg) ................108.0 (49.0)
Outboard Weight (Short Shaft with Recoil Starter), lbs (kg) ................ 97.0 (44.0)
Outboard Weight (Short Shaft with Electric Starter), lbs (kg) ................ 105.7 (48.0)
| Fuel System |
Fuel System Type ................ Carburetor
Carburetor Model ................ Keihin BCM 23-11.5
Fuel Type ................ Unleaded gasoline (87 or 91 octane minimum)
Fuel Tank Capacity, gal (L) ................ 3.2 (12.0)
| Gear Housing |
Gear Shift ................ F-N-R
Reduction System ................ Bevel gear
Gear Ratio ................ 2.08:1
Gear Oil Capacity, qts (L) ................ 0.18 (0.17)
| Mid Section |
Trim System ................ Manual Trim and Tilt
Number of Tilt Pin Position ................ 5
Transom Height (Long Shaft), in (mm) ................ 20 (508)
Transom Height (Short Shaft), in (mm) ................ 15 (381)
Steering System ................ Tiller Handle or Remote Control
Trim Angle, deg ................ 4-20
Tilt Angle (Max), deg ................ 67
| Propeller Information |
Diameter, in (mm) ................ 9.25 (235)
Pitch, in (mm) ................ 7 (177), 8 (203), 9 (228), 10 (254), 11 (280)
Number Of Blade ................ 3
Material ................ Aluminum
| Cylinder Block |
Cylinder Bore Inside Diameter, in (mm) ................ 2.2835-2.2841 (58.000-58.015)
Cylinder Bore (Max Out of Round), in (mm) ................ 0.002 (0.050)
Crank Pin Outside Diameter, in (mm) ................ 1.1413-1.1417 (28.989-29.000)
Crank Pin Width, in (mm) ................ 0.791-0.793 (20.100-20.150)
Crankshart Thrust Play, in (mm) ................ 0.024 (0.6)
Crankshart Runout (Maximum), in (mm) ................ 0.0016 (0.040)
Crankshaft Journal Outside Diameter, in (mm) ................ 1.2594-1.2598 (31.989-32.000)
Crankshaft Journal Oil Clearance, in (mm) ................ 0.0008-0.0019 (0.020-0.047)
Connecting Rod Inside Diameter (Big End), in (mm) ................ 1.1427-1.1431 (29.025-29.034)
Connecting Rod Oil Clearance (Big End), in (mm) ................ 0.0010-0.0018 (0.025-0.045)
Connecting Rod Side Clearance (Big End), in (mm) ................ 0.004-0.008 (0.10-0.20)
Connecting Rod Width (Big End), in (mm) ................ 0.7854-0.7874 (19.950-20.000)
Connecting Rod Inside Diameter (Small End), in (mm) ................ 0.5514-0.5517 (14.006-14.014)
Piston Skirt Diameter, in (mm) ................ 2.2821-2.2827 (57.965-57.980)
Piston to Cylinder Clearance, in (mm) ................ 0.0011-0.0017 (0.0271-0.0425)
Piston Pin Outside Diameter, in (mm) ................ 0.5510-0.5512 (13.995-14.000)
Piston Pin Bore Inside Diameter, in (mm) ................ 0.5513-0.5515 (14.002-14.008)
Piston to Piston Pin Clearance, in (mm) ................ 0.0001-0.0005 (0.002-0.013)
Top Ring Width, in (mm) ................ 0.048-0.049 (1.21-1.23)
Second Ring Width, in (mm) ................ 0.048-0.049 (1.21-1.23)
Oil Ring Width, in (mm) ................ 0.099-0.100 (2.51-2.53)
Top Ring End Gap, in (mm) ................ 0.004-0.010 (0.10-0.25)
Second Ring End Gap, in (mm) ................ 0.004-0.010 (0.10-0.25)
Top Ring Side Clearance, in (mm) ................ 0.001-0.002 (0.02-0.06)
Second Ring Side Clearance, in (mm) ................ 0.001-0.002 (0.02-0.06)
| Cylinder Head and Valves |
Cylinder Head Warp Limit ................ 0.002 (0.050)
Valve Head Diameter (Intake), in (mm) ................ 1.02 (26.0)
Valve Head Diameter (Exhaust), in (mm) ................ 0.87 (22.0)
Valve Head Thickness (Intake), in (mm) ................ 0.02 (0.50)
Valve Head Thickness (Exhaust), in (mm) ................ 0.02 (0.50)
Valve Stem Outside Diameter (Intake), in (mm) ................ 0.2156-0.2161 (5.475-5.490)
Valve Stem Outside Diameter (Exhaust), in (mm) ................ 0.2146-0.2152 (5.450-5.465)
Valve Guide Inside Diameter (Intake), in (mm) ................ 0.2165-0.2170 (5.500-5.512)
Valve Guide Inside Diameter (Exhaust), in (mm) ................ 0.2165-0.2170 (5.500-5.512)
Valve Stem To Valve Guide Clearance (Intake), in (mm) ................ 0.0004-0.0015 (0.010-0.037)
Valve Stem To Valve Guide Clearance (Exhaust), in (mm) ................ 0.0014-0.0024 (0.035-0.062)
Valve Seat Width (Intake), in (mm) ................ 0.035-0.043 (0.9-1.1)
Valve Seat Width (Exhaust), in (mm) ................ 0.035-0.043 (0.9-1.1)
Valve Spring Free Length, in (mm) ................ 1.28 (32.52)
Cam Height (Intake), in (mm) ................ 0.9210-0.9234 (23.394-23.454)
Cam Height (Exhaust), in (mm) ................ 0.9211-0.9235 (23.397-23.457)
Camshaft Journal Outside Diameter (Upper), in (mm) ................ 0.9826-0.9835 (24.959-24.980)
Camshaft Journal Outside Diameter (Lower), in (mm) ................ 0.9039-0.9047 (22.959-22.980)
Camshaft Journal Oil Clearance, in (mm) ................ 0.0008-0.0024 (0.020-0.062)
| Maintenance Data |
Engine Fuel Type ................ Unleaded 87 or 91 octane minimum
Engine Oil Type ................ SAE 10W-40
API Service Classifications ................ SE, SF, SG, SH, and SJ
Engine Oil Capacity, qts (L) ................ 1.05 (1.00)
Gear Lubricant Type ................ Suzuki Outboard Motor Gear Oil or GL5 SAE 90
Gearcase Capacity, qts (L) ................ 0.18 (0.17)
Ignition Timing, degrees ................ 5-30 BTDC
Spark Plug Type ................ NGK BKR6E
Spark Plug Gap, in (mm) ................ 0.028-0.031 (0.7-0.8)
Valve Clearance (Intake), in (mm) ................ 0.007-0.009 (0.18-0.22)
Valve Clearance (Exhaust), in (mm) ................ 0.007-0.009 (0.18-0.22)
| Service Intervals |
Check Battery ................ Every 100 hours
Change Engine Oil ................ Every 100 hours
Change Gear Oil ................ Every 100 hours
Check Spark Plug ................ Every 100 hours
Check Breather and Fuel Line ................ Every 100 hours
Check Fuel Filter ................ Every 100 hours
Check Anodes ................ Every 100 hours
Check Thermostat ................ Every 100 hours
Check Carburetor ................ Every 100 hours
Check Propeller Nut and Pin ................ Every 100 hours
Replace Oil Filter ................ Every 200 hours
Check Valve Clearance ................ Every 200 hours
Check Timing Belt ................ Every 200 hours
Check Idle Speed ................ Every 200 hours
Check Water Pump ................ Every 200 hours
Replace Spark Plug ................ Every 200 hours
Replace Water Pump Impeller ................ Every 200 hours
Replace Fuel Filter ................ Every 400 hours
| Tightening Torques |
Cylinder head cover bolt, Nm (lb-ft) ................ 10 (7.0)
Cylinder head bolt, Nm (lb-ft) ................ 27 (20.0)
Intake manifold bolt, Nm (lb-ft) ................ 23 (16.5)
Carburetor mounting bolt, Nm (lb-ft) ................ 10 (7.0)
Flywheel nut, Nm (lb-ft) ................ 80 (58.0)
Power unit mounting bolt, Nm (lb-ft) ................ 23 (16.5)
Clamp bracket shaft nut, Nm (lb-ft) ................ 43 (31.0)
Crankcase bolt, Nm (lb-ft) ................ 14 (10.5)
Connecting rod cap bolt, Nm (lb-ft) ................ 12 (8.5)
Valve adjusting lock nut, Nm (lb-ft) ................ 11 (8.0)
Fuel pump mounting bolt, Nm (lb-ft) ................ 10 (7.0)
Engine oil drain plug, Nm (lb-ft) ................ 13 (9.5)
Water pump case bolt, Nm (lb-ft) ................ 8 (6.0)
Tiller handle pivot bolt, Nm (lb-ft) ................ 17 (12.5)
Gearcase bolt, Nm (lb-ft) ................ 23 (16.5)
Propeller nut, Nm (lb-ft) ................ 18 (13.0)
Spark plug, Nm (lb-ft) ................ 10-12 (7.5-9.0)
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