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Kohler KT17 Engine

General Technical Data

Kohler KT17 Engine Specifications

Engine Model ................... Kohler KT17
Engine Type ................... 4-Stroke, gasoline, twin-cylinder air-cooled
Number of Cylinders ................... 2
Displacement, cc (cu.in) ................... 692 (42.2)
Engine Bore, mm (in) ................... 79.4 (3.13)
Engine Stroke, mm (in) ................... 69.8 (2.75)
Rated Engine Power, hp (kW) ................... 17.0 (12.7)
Rated Engine Speed, rpm ................... 3600
Lubrication ................... Pressurized
Oil Pump ................... Rotor type
Oil Capacity, L (qts) ................... 1.42 (1.50)
Electrical System Rating, Volts ................... 12
Charging System ................... Alternator
Weight, kg (lbs) ................... 53.5 (118)

Fuel System

Fuel System Type ................... Carburetor
Carburetor Model ................... Kohler
Carburetor Type ................... Side draft, adjustable jet
Fuel Pump ................... Mechanically operated
Governor ................... Mechanical

Kohler KT17 Maintenance Data

Cylinder Block and Valves

Cylinder Bore I.D. (Maximum), mm (in) ................... 79.45 (3.128)
Cylinder Head (Max. Out-of-Flatness), mm (in) ................... 0.8 (0.003)
Intake Valve Clearance (Cold), mm (in) ................... 0.076-0.152 (0.003-0.006)
Exhaust Valve Clearance (Cold), mm (in) ................... 0.278-0.354 (0.011-0.014)

Engine Oil

Engine Oil Type (Summer) ................... SAE 30
Engine Oil Type (Winter) ................... SAE 5W-20, 5W-30
Oil Classification ................... SF or SG
Oil Capacity (w/o Filter), L (qts) ................... 1.5 (1.6)
Oil Capacity (with Filter), L (qts) ................... 1.9 (2.0)

Carburetor Adjustment

Main Fuel ................... 2-1/2 turns
Idle Fuel ................... 1 to 1-1/4 turns
Low Idle Speed, rpm ................... 1200±75
High Idle Speed, rpm ................... 3600±50

Ignition System

Spark Plug Type ................... Champion RBL15Y
Spark Plug Gap, mm (in) ................... 0.635 (0.025)
Breaker Point Gap, mm (in) ................... 0.432-0.580 (0.017-0.023)
Thread Size, mm (in) ................... 14 (0.55)
Spark Plug Reach, mm (in) ................... 11.7 (0.46)
Spark Plug Torque, Nm (ft-lbs) ................... 14-20 (10-15)

Service Intervals

Change Engine Oil ................... Every 25 hrs
Service Precleaner - Every 25 hrs
Check Air Cleaner Every 50 hrs
Clean Cooling Fins and External Surfaces ................... Every 50 hrs
Check Spark Plug ................... Every 100 hrs
Check Carburetor Adjustment ................... Every 100 hrs
Check Compression ................... Every 500 hrs
Service Breaker Points ................... Every 500 hrs
Check Ignition Timing ................... Every 500 hrs
Check Valve and Tappet Clearance ................... Every 500 hrs
Service Cylinder Head ................... Every 500 hrs
Service Starting Motor Drive ................... Every 500 hrs

Kohler KT17 Service Specifications

Cylinder Block

Cylinder Bore Diameter (Std), in (mm) ................... 3.125 (79.375)
Cylinder Bore Diameter (Max. Wear), in (mm) ................... 3.128 (79.45)
Cylinder Bore (Max. Taper), in (mm) ................... 0.0015 (0.038)
Cylinder Bore (Max. Out of Round), in (mm) ................... 0.002 (0.05)
Camshaft End Play, in (mm) ................... 0.003-0.013 (0.077-0.330)
Camshaft Bearing, in (mm) ................... 0.0010-0.0025 (0.025-0.063)
Crankcase End Play (Ball Bearing), in (mm) ................... 0.002-0.023 (0.051-0.580)

Piston and Piston Rings

Piston Thrust Face to Bore Running, in (mm) ................... 0.006-0.008 (0.15-0.20)
Top Ring Side Clearance, in (mm) ................... 0.002-0.004 (0.051-0.10)
Second Ring Side Clearance, in (mm) ................... 0.001-0.003 (0.025-0.077)
Oil Ring Side Clearance, in (mm) ................... 0.001-0.003 (0.025-0.077)
Rings End Gap, in (mm) ................... 0.010-0.020 (0.254-0.508)
Wrist Pin to Piston Boss (Max), in (mm) ................... 0.0003 (0.008)
Wrist Pin to Rod, in (mm) ................... 0.0006-0.0011 (0.016-0.027)
Piston Thrust Face Diameter (Max. Wear), in (mm) ................... 3.1165 (79.159)

Valves

Intake Valve to Tappet (Cold), in (mm) ................... 0.003-0.006 (0.076-0.150)
Exhaust Valve to Tappet (Cold), in (mm) ................... 0.011 -0.014 (0.279-0.355)
Valve Lift (Zero Lash), in (mm) ................... 0.280 (7.11)
Intake Valve Stem to Guide (Max), in (mm) ................... 0.0045 (0.114)
Exhaust Valve Stem to Guide (Max), in (mm) ................... 0.0065 (0.165)
Tappet Clearance in Guide (Max), in (mm) ................... 0.0005-0.0024 (0.013-0.060)
Valve Guide Interference Fit in Cylinder, in (mm) ................... 0.005-0.002 (0.013-0.051)
Valve Guide Ream Diameter, in (mm) ................... 0.312-0.313 (7.925-7.950)

Crankshaft

Crankshaft End Play (Sleeve Bearing), in (mm) ................... 0.002-0.014 (0.051-0.355)
Crankshaft Running Clearance (Sleeve Bearing), in (mm) ................... 0.0013-0.0033 (0.034-0.083)
Crankshaft Crankpin Diameter (Std), in (mm) ................... 1.3733-1.3738 (34.882-34.895)
Crankshaft Crankpin (Max. Out of Round), in (mm) ................... 0.0005 (0.013)
Crankshaft Crankpin (Max. Taper), in (mm) ................... 0.001 (0.025)
Crankshaft Main Bearing Diameter (Std), in (mm) ................... 1.7412-1.7422 (44.226-44.252)
Crankshaft Main Bearing Diameter (Min), in (mm) ................... 1.7407 (44.22)

Connecting Rod

Connecting Rod to Piston Pin Running, in (mm) ................... 0.0006-0.0011 (0.016-0.027)
Connecting Rod to Side Play on Crankpin, in (mm) ................... 0.005-0.016 (0.13-0.41)
Connecting Rod to Crankpin Running, in (mm) ................... 0.0012-0.0024 (0.030-0.060)
Connecting Rod Crankpin Bore Diameter, in (mm) ................... 1.3750-1.3757 (34.925-34.943)
Connecting Rod Crankpin Bore Diameter (Max), in (mm) ................... 1.3765 (34.963)
Connecting Rod Wristpin Bore Diameter, in (mm) ................... 0.62565 (15.891)

Kohler KT17 Tightening Torque Specs

Spark Plugs, Nm (ft-lbs) ................... 14-20 (10-15)
Flywheel Retaining Screw, Nm (ft-lbs) ................... 54 (40)
Manifold Screws, Nm (ft-lbs) ................... 17 (12.6)
Closure Plate Screws, Nm (ft-lbs) ................... 17 (12.6)
Cylinder Head Screws, Nm (ft-lbs) ................... 20-27 (15-20)
Cylinder Barrel Stud Nuts, Nm (ft-lbs) ................... 40.5 (30)
Connecting Rod Screws, Nm (ft-lbs) ................... 23 (17)
Connecting Rod Nuts, Nm (ft-lbs) ................... 15.8 (11.7)
Crankcase Stud Nuts, Nm (ft-lbs) ................... 29 (21.5)
Crankcase Cap Screws, Nm (ft-lbs) ................... 17 (12.6)