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Kohler CV750 Engine

The Kohler CV750 is a four-stroke V-twin cylinder OHV vertical shaft air-cooled small gasoline engine from Command PRO series. A 46 cu. in (747 cc) engine has a cylinder bore of 3.27" (83 mm), piston stroke of 2.72" (69 mm), and rated power of 30 Hp (22.4 kW) at 3600 rpm. The compression ratio rating is 9.4:1. The Kohler CV750 engine is equipped with a full pressure lubrication system, twin-barrel carburetor with fixed main jet, digital spark advance ignition, paper element air cleaner, and bendix type electric starter. The operating weight is 105 lbs (47.5 kg).

General Technical Data

Engine Specifications

Engine Model ..................... Kohler Command PRO CV750
Engine Type ..................... 4-cycle OHV V-Twin cylinder air-cooled gasoline
Number of Cylinders ..................... 2
Displacement, cc (cu.in) ..................... 747 (46.0)
Cylinder Bore, mm (in) ..................... 83.0 (3.27)
Piston Stroke, mm (in) ..................... 69.0 (2.72)
Maximum Engine Power, hp (kW) ..................... 30.0 (22.4)
Maximum Engine Speed, rpm ..................... 3600
Peak Torque, Nm (ft-lbs) ..................... 59.6 (44.1)
Torque Speed, rpm ..................... 2400
Compression Ratio ..................... 9.4:1
Lubrication System ..................... Full pressure
Oil Filter Type ..................... Full-flow
Cooling System .................. Forced-air
Air Cleaner Type ..................... Replaceable, paper element
Ignition System .................. Digital spark advance ignition
Electrical System Rating, Volts ..................... 12
Starter Type ..................... Electric

Fuel System

Fuel System Type ..................... Carburetor
Carburetor Model ..................... Nikki or Keihin
Carburetor Type ..................... Two-Barrel, fixed main jet
Fuel Pump Type ..................... Pulse or Mechanical
Fuel Filter Type ..................... In-line
Governor Type ..................... Mechanical

Dimensions and Weight

Overall Length, mm (in) ..................... 452 (17.8)
Overall Width, mm (in) ..................... 451 (17.8)
Overall Height, mm (in) ..................... 360 (14.1)
Dry Weight, kg (lbs) ..................... 47.5 (105.0)

Maintenance Data

Engine Oil

Engine Oil Type (Summer Time) ..................... SAE 10W-30
Engine Oil Type (Winter Time) ..................... SAE 5W-30
Oil Classification (API Service) ..................... SG, SH, SJ, or higher
Oil Capacity (w/o Filter), L (qts) ..................... 1.7 (1.8)
Oil Capacity (with New Filter), L (qts) ..................... 1.9 (2.0)

Ignition System

Spark Plug Type ..................... Champion RC12YC
Spark Plug Gap, mm (in) ..................... 0.76 (0.030)
Module Air Gap, mm (in) ..................... 0.280-0.330 (0.011-0.013)
Thread Size, mm (in) ..................... 14 (0.55)
Spark Plug Torque, Nm (ft-lbs) ..................... 27 (20)

Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Std), mm (in) ..................... 82.988-83.013 (3.2672-3.2682)
Cylinder Bore Inside Diameter (Wear Limit), mm (in) ..................... 83.051 (3.2697)
Cylinder Bore (Max Out of Round), mm (in) ..................... 0.12 (0.0047)
Crankshaft End Play (Free), mm (in) ..................... 0.070-0.590 (0.0028-0.0230)
Crankshaft Bore I.D (Crankcase), mm (in) ..................... 40.965-41.003 (1.6128-1.6143)
Crankshaft Bore I.D (Oil Pan), mm (in) ..................... 40.987-40.974 (1.6136-1.6131)
Crankshaft Bearing Journal O.D (Flywheel), mm (in) ............. 40.913-40.935 (1.6107-1.6116)
Crankshaft Bearing Journal O.D (Oil Pan), mm (in) ....... 40.913-40.935 (1.6107-1.6116)
Connecting Rod to Crankpin Clearance, mm (in) ..................... 0.030-0.055 (0.0012-0.0022)
Connecting Rod to Crankpin Side Clearance, mm (in) ..................... 0.26-0.63 (0.0102-0.0248)
Connecting Rod to Piston Pin Clearance, mm (in) ..................... 0.015-0.028 (0.0006-0.0011)
Connecting Rod Journal O.D, mm (in) ..................... 35.955-35.973 (1.4156-1.4163)
Piston to Piston Pin Clearance, mm (in) ..................... 0.006-0.017 (0.0002-0.0007)
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 Thrust Face O.D (Piston A), mm (in) ..................... 82.949-82.967 (3.2656-3.2664)
Top Ring Groove Clearance (Piston A), mm (in) ..................... 0.025-0.048 (0.001-0.0019)
Middle Ring Groove Clearance (Piston A), mm (in) ..................... 0.015-0.037 (0.0006-0.0015)
Oil Ring Groove Clearance (Piston A), mm (in) ..................... 0.026-0.176 (0.001-0.0069)
Top Ring End Gap (Piston A), mm (in) ..................... 0.250-0.560 (0.0098-0.022)
Middle Ring End Gap (Piston A), mm (in) ..................... 0.250-0.560 (0.0098-0.022)
Piston Thrust Face O.D (Piston B), mm (in) ..................... 82.978 (3.2668)
Top Ring Groove Clearance (Piston B), mm (in) ..................... 0.030-0.070 (0.0010-0.0026)
Middle Ring Groove Clearance (Piston B), mm (in) ..................... 0.030-0.070 (0.0010-0.0026)
Oil Ring Groove Clearance (Piston B), mm (in) ..................... 0.060-0.190 (0.0022-0.0073)
Top Ring End Gap (Piston B), mm (in) ..................... 0.189-0.277 (0.0074-0.0109)
Middle Ring End Gap (Piston B), mm (in) ..................... 1.519-1.797 (0.0598-0.0708)

Cylinder Head and Valves

Cylinder Head Max Out of Flatness, mm (in) ..................... 0.076 (0.003)
Valve Lifter to Crankcase Clearance, mm (in) ..................... 0.0241-0.0501 (0.0009-0.0020)
Intake Valve Stem to Valve Guide Clearance, mm (in) ..................... 0.038-0.076 (0.0015-0.0030)
Exhaust Valve Stem to Valve Guide Clearance, mm (in) ..................... 0.050-0.088 (0.0020-0.0035)
Intake Valve Guide Inside Diameter, mm (in) ..................... 7.038-7.058 (0.2771-0.2779)
Exhaust Valve Guide Inside Diameter, mm (in) ..................... 7.038-7.058 (0.2771-0.2779)
Intake Valve Minimum Lift, mm (in) ..................... 8.07 (0.3177)
Exhaust Valve Minimum Lift, mm (in) ..................... 8.07 (0.3177)
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)
Camshaft End Play, mm (in) ..................... 0.076-0.127 (0.0030-0.0050)
Camshaft Clearance, mm (in) ..................... 0.025-0.063 (0.0010-0.0025)
Camshaft Bore Inside Diameter, mm (in) ..................... 20.000-20.025 (0.7874-0.7884)
Camshaft Bearing O.D, mm (in) ..................... 19.962-19.975 (0.7859-0.7864)

Tightening Torque Specs

Cylinder Head Nut ..................... 16.9-35.5 Nm (12.5-26.5 ft-lb)
Cylinder Head Bolt ..................... 22.6-41.8 Nm (16.7-30.8 ft-lb)
Rocker Arm Screw ..................... 13.6 Nm (10 ft-lb)
Connecting Rod Cap ..................... 13.6 Nm (10 ft-lb)
Flywheel Retaining Screw ..................... 66.4 Nm (49.1 ft-lb)
Intake Manifold Mounting ..................... 7.4 Nm (5.5 ft-lb)
Carburetor Mounting Nut ..................... 6.2-7.3 Nm (4.6-5.4 ft-lb)
Closure Plate ..................... 24.4 Nm (18.1 ft-lb)
Oil Drain Plug ..................... 13.6 Nm (10.1 ft-lb)
Governor Lever Nut ..................... 6.8 Nm (5.1 ft-lb)
Ignition Module ..................... 4.0-6.2 Nm (2.9-4.6 ft-lb)
Muffler Retaining Nut ..................... 24.4 Nm (18.1 ft-lb)
Oil Pump Screw ..................... 10.7 Nm (7.9 ft-lb)
Spark Plug ..................... 27 Nm (20.1 ft-lb)

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