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Kohler 7000 Series KT735

General Technical Data

Kohler KT735 Engine Specifications

Engine Model ..................... Kohler 7000 Series KT735
Engine Type ..................... Gasoline, 4-cycle, twin-cylinder, air-cooled, vertical shaft
Number of Cylinders ..................... 2
Displacement, cc (cu.in) ..................... 725 (44.2)
Engine Bore, mm (in) ..................... 83.0 (3.27)
Engine Stroke, mm (in) ..................... 67.0 (2.64)
Rated Engine Power, hp (kW) ..................... 24.0 (17.9)
Rated Engine Speed, rpm ..................... 3600
Maximum Torque, Nm (ft-lbs) ..................... 54.9 (40.5)
Torque Speed, rpm ..................... 2600
Compression ..................... 9.1:1
Lubrication ..................... Full pressure
Oil filter ..................... Full-flow type
Air Cleaner ..................... Replaceable, paper element
Oil Capacity, L (qts) ..................... 1.9 (2.0)
Electrical System Rating, Volts ..................... 12

Fuel System

Fuel System Type ..................... Carburetor
Carburetor Model ..................... Keihin or Walbro
Carburetor Type ..................... Fixed main jet
Fuel Pump ..................... Pulse type
Fuel Filter ..................... In-line
Governor ..................... Mechanical

Dimensions

Length, mm (in) ..................... 470 (18.6)
Width, mm (in) ..................... 445 (17.5)
Height, mm (in) ..................... 351 (13.9)
Net weight, kg (lbs) ..................... 38.6 (85)

Kohler KT735 Maintenance Data

Cylinder Block and Valves

Cylinder Bore Inside Diameter (Maximum), mm (in) ..................... 83.069 (3.2704)
Cylinder Head (Max. Out of Flatness), mm (in) ..................... 0.076 (0.003)
Intake Valve Clearance (Cold), mm (in) ..................... 0.10-0.15 (0.004-0.006)
Exhaust Valve Clearance (Cold), mm (in) ..................... 0.10-0.15 (0.004-0.006)

Engine Oil

Engine Oil Type (Summer) ..................... SAE 10W-30
Engine Oil Type (Winter) ..................... SAE 5W-30
Oil Classification ..................... SJ or higher
Oil Capacity (with Filter), L (qts) ..................... 1.9 (2.0)

Carburetor Adjustment

Main Fuel ..................... Not adjustable (Factory setting)
Idle Fuel ..................... Not adjustable (Factory setting)
Low Idle Speed, rpm ..................... 1750±75
High Idle Speed, rpm ..................... 3600±50

Ignition System

Spark Plug Type ..................... Champion RC12YC or NGK CS6
Spark Plug Gap, mm (in) ..................... 0.76 (0.030)
Module Air Gap, mm (in) ..................... 0.203-0.305 (0.008-0.012)
Thread Size, mm (in) ..................... 14 (0.55)
Reach, mm (in) ..................... 19.1 (0.75)
Spark Plug Torque, Nm (ft-lbs) ..................... 24-30 (18-22)

Service Intervals

Service Precleaner Element ..................... Every 25 hours
Replace Air Cleaner Element ..................... Every 100 hours
Change Engine Oil ..................... Every 100 hours
Change Oil Filter ..................... Every 100 hours
Clean Cooling Areas ..................... Every 100 hours
Replace Fuel Filter ..................... Every 100 hours
Check Carburetor Adjustment ..................... Every 100 hours
Check Spark Plug Gap ..................... Every 200 hours
Replace Spark Plug ..................... Every 500 hours
Check and Adjust Valve Clearance ..................... Every 500 hours

Kohler KT735 Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Std), mm (in) ..................... 83.006-83.031 (3.2679-3.2689)
Cylinder Bore Inside Diameter (Wear Limit), mm (in) ..................... 83.069 (3.2704)
Cylinder Bore (Max. Taper), mm (in) ..................... 0.05 (0.002)
Cylinder Bore (Max. Out of Round), mm (in) ..................... 0.12 (0.0047)
Cylinder Head (Max. Out of Flatness), mm (in) ..................... 0.076 (0.003)
Camshaft End Play, mm (in) ..................... 0.06-0.40 (0.0024-0.0157)
Camshaft Clearance 0.040-0.077 (0.0016-0.0030)
Camshaft Bore Inside Diameter 20.000-20.025 (0.7874-0.7884)
Camshaft Bearing Surface Inside Diameter, mm (in) ..................... 19.948-19.960 (0.7854-0.7858)
Connecting Rod to Crankpin Clearance, mm (in) ..................... 0.037-0.083 (0.0015-0.0033)
Connecting Rod to Crankpin Side Clearance, mm (in) ..................... 0.261-0.67 (0.0102-0.0264)
Connecting Rod to Piston Pin Clearance, mm (in) ..................... 0.013-0.032 (0.0005-0.0013)

Valves and Valve Lifters

Valve Lash, mm (in) ..................... 0.076 (0.003)
Intake Valve Minimum Lift, mm (in) ..................... 8.9 (0.350)
Exhaust Valve Minimum Lift, mm (in) ..................... 8.9 (0.350)
Valve Face Angle (Intake/Exhaust), mm (in) ..................... 45 degrees
Valve Seat Angle (Intake/Exhaust), mm (in) ..................... 89 degrees
Intake Valve Stem to Valve Guide Clearance, mm (in) ..................... 0.038-0.076 (0.0015-0.003)
Exhaust Valve Stem to Valve Guide Clearance, mm (in) ..................... 0.050-0.88 (0.0020-0.0035)
Intake Valve Guide Inside Diameter, mm (in) ..................... 6.038-6.058 (0.2377-0.2385)
Intake Valve Stem Diameter, mm (in) ..................... 5.982-6.0 (0.2355-0.2362)
Exhaust Valve Guide Inside Diameter, mm (in) ..................... 6.038-6.058 (0.2377-0.2385)
Exhaust Valve Stem Diameter, mm (in) ..................... 5.970-5.988 (0.235-0.2357)
Intake Valve Insert Outside Diameter, mm (in) ..................... 36.987-37.013 (1.4562-1.4572)
Exhaust Valvesert Outside Diameter, mm (in) ..................... 32.987-33.013 (1.2987-1.2997)
Intake Valve Guide Depth, mm (in) ..................... 4.00 (0.1575)
Exhaust Valve Guide Depth, mm (in) ..................... 6.50 (0.2559)
Intake Valve Head Diameter, mm (in) ..................... 33.37-33.63 (1.3138-1.3240)
Exhaust Valve Head Diameter, mm (in) ..................... 29.37-29.63 (1.1563-1.1665)
Intake Valve Stem Diameter, mm (in) ..................... 6.982-7.000 (0.2749-0.2756)
Exhaust Valve Stem Diameter, mm (in) ..................... 6.970-6.988 (0.2744-0.2751)

Crankshaft

Crankshaft End Play (Free), mm (in) ..................... 0.075-0.595 (0.0030-0.0023)
Crankshaft Bore Crankcase Inside Diameter, mm (in) ..................... 40.974-40.987 (1.6131-1.6137)
Crankshaft Bore Oil Pan Inside Diameter, mm (in) ..................... 40.974-40.987 (1.6131-1.6137)
Flywheel End Main Bearing Journal Outside Diameter, mm (in) ................. 40.913-40.935 (1.6107-1.6116)
Flywheel End Main Bearing Journal (Max. Taper), mm (in) ..................... 0.0220 (0.0009)
Flywheel End Main Bearing Journal (Max. Out of Round), mm (in) ..................... 0.025 (0.001)
Oil Pan End Main Bearing Journal Outside Diameter, mm (in) ..................... 40.913-40.935 (1.6107-1.6116)
Oil Pan End Main Bearing Journal (Max. Taper), mm (in) ..................... 0.020 (0.0008)
Oil Pan End Main Bearing Journal (Max. Out of Round), mm (in) ..................... 0.025 (0.001)
Crankshaft Bore Oil Pan Clearance, mm (in) ..................... 0.039-0.087 (0.0015-0.0034)
Crankshaft Bore Crankcase Clearance, mm (in) ..................... 0.039-0.087 (0.0015-0.0034)
Connecting Rod Journal Outside Diameter, mm (in) ..................... 35.950-35.974 (1.4154-1.4163)
Connecting Rod Journal (Max. Taper), mm (in) ..................... 0.018 (0.0007)
Connecting Rod Journal (Max. Out of Round), mm (in) ..................... 0.025 (0.001)
Crankshaft T.I.R (PTO End, Crankshaft Engine), mm (in) ..................... 0.279 (0.0110)
Crankshaft T.I.R (Entire Crankshaft, V-Blocks), mm (in) ..................... 0.200 (0.0079)

Piston and Piston Rings

Piston Pin Bore Inside Diameter, mm (in) ..................... 17.006-17.012 (0.6695-0.6698)
Piston Pin Outside Diameter, mm (in) ..................... 16.995-17.000 (0.6691-0.6693)
Piston Pin End Inside Diameter, mm (in) ..................... 17.013-17.027 (0.6698-0.6704)
Top Compression Ring to Groove Side Clearance, mm (in) ..................... 0.030-0.070 (0.001-0.0026)
Middle Compression Ring to Groove Side Clearance, mm (in) ..................... 0.030-0.070 (0.001-0.0026)
Oil Control Ring to Groove Side Clearance, mm (in) ..................... 0.060-0.190 (0.0022-0.0073)
Top Compression Ring End Gap, mm (in) ..................... 0.189-0.277 (0.0074-0.0109)
Middle Compression Ring End Gap, mm (in) ..................... 1.519-1.797 (0.0598-0.0708)
Piston Thrust Face Outside Diameter, mm (in) ..................... 82.978 (3.2668)
Piston Thrust Face to Cylinder Bore Clearance, mm (in) ..................... 0.019-0.062 (0.0007-0.0024)

Kohler KT735 Tightening Torque Specifications

Cylinder Head, Nm (ft-lb) ..................... 22.6-41.0 (16.7-30.0)
Rocker Arm Pivot Stud, Nm (ft-lb) ..................... 11.3 (8.4)
Flywheel Retaining Screw, Nm (ft-lb) ..................... 74.5 (55.0)
Connecting Rod Cap, Nm (ft-lb) ..................... 11.5 (8.5)
Oil Drain Plug, Nm (ft-lb) ..................... 13.6 (10.0)
Fuel Pump, Nm (ft-lb) ..................... 2.8 (2.1)
Electric Starter Mounting Nut, Nm (ft-lb) ..................... 5.2 (3.9)
Ignition Module, Nm (ft-lb) ..................... 6.0 (4.5)
Muffler Retaining Nuts, Nm (ft-lb) ..................... 24.4 (18.0)
Oil Pan, Nm (ft-lb) ..................... 24.4 (18.0)
Oil Pump Mounting Screw, Nm (ft-lb) ..................... 9.9 (7.3)
Carburetor Mounting Nut, Nm (ft-lb) ..................... 6.2-7.3 (4.6-5.4)
Governor Control Lever, Nm (ft-lb) ..................... 7.0-8.5 (5.2-6.3)