Kohler Confidant ZT740

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Speciﬁ cations

KohlerEngines.com 16 690 01 Rev. --

Dimensions in millimeters.

Inch equivalents shown in [ ].

Engine Dimensions with Heavy-Duty Air Cleaner

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Table of Contents1
Safety Precautions2
Maintenance Instructions3
Maintenance Schedule3
Oil Recommendations4
Fuel Recommendations4
Storage4
Speciﬁcations5
Engine Dimensions with Low-Proﬁle Air Cleaner5
Engine Dimensions with Heavy-Duty Air Cleaner6
Engine Identification Numbers7
General Specifications7
Torque Specifications7
Clearance Specifications9
General Torque Values12
Separate Tool Suppliers13
Tools13
Aids14
Flywheel Holding Tool15
Rocker Arm/Crankshaft Tool15
Troubleshooting Guide16
External Engine Inspection17
Cleaning Engine17
Crankcase Vacuum Test18
Compression Test19
Cylinder Leakdown Test19
Air Cleaner/Intake20
Precleaner20
Paper Element20
Air Cleaner Base20
Breather Tube20
Air Cooling20
Fuel Line21
Fuel Pump21
Fuel System Tests21
Performance21
Carburetor22
Troubleshooting Checklist22
Keihin One-Barrel Carburetor Components22
Walbro One-Barrel Carburetor Components22
Troubleshooting-Carburetor Related Causes23
Fuel Shut-Off Solenoid23
Carburetor Circuits23
Carburetor Adjustments24
Carburetor Servicing24
Float Setting24
High Altitude Operation25
Unitized Throttle and Choke Control26
Governor/Throttle Control Connections26
Throttle Cable Adjustment27
Starting an Engine Equipped with Unitized Throttle and Choke Control27
Governor System28
Governor Components28
Governor Adjustments28
Lubrication System29
Lubrication Components29
Check Oil Level29
Change Oil and Filter29
Oil Sentry30
Installation30
Testing30
Electrical System31
Spark Plug Component and Details31
Service31
Inspection31
Electronic Ignition Systems32
Battery Maintenance32
Battery Test32
Carbon Fouled32
Ignition System33
Wiring Diagram-Electronic Ignition System Diagram33
Electronic Ignition Systems Tests34
Test for Spark34
Battery Charging System35
12/15/25 Amp Regulated Charging System35
12/15/25 Amp Battery Charging Systems36
Troubleshooting-Starting Difﬁ Culties37
Starter System37
Starter System38
Inertia Drive Electric Starter Components38
Drive Service38
Retaining Ring Installation38
Starter Disassembly39
End Cap/Brush Replacement39
Starter Reassembly39
Solenoid Shift Starter Components39
Brushes and Springs40
Armature40
Components and Details40
Brush Replacement40
Solenoid Tests42
Retractable Starter Components43
Remove Starter44
Rope Replacement44
Pawls Replacement44
Install Starter44
Emission Compliant Systems45
Carbon Canister System45
Operation45
Maintenance45
Twin Secondary Air Induction System46
Single Secondary Air Induction System46
Remove Inlet Screen47
Inlet Components47
Disassembly/Inspection and Service48
External Engine Components48
Disconnect Spark Plug Leads49
Remove Fuel Pump49
Remove Blower Housing and Outer Bafﬂes49
Remove Throttle Controls49
Remove Air Cleaner and Carburetor50
Remove Inner Bafﬂes50
Remove Ignition Modules50
Remove Intake Manifold and Rectiﬁ Er-Regulator50
Cylinder Head Components51
Remove Valve Covers and Cylinder Heads51
Remove Cylinder Heads51
Disassemble Cylinder Heads51
Valve Details52
Valve Guides53
Lapping Valves53
Intake Valve Stem Seal53
Flywheel/Ignition/Breather Components53
Remove Debris Screen, Fan, and Flywheel54
Remove Backing Plate and Stator54
Remove Outer Breather Assembly54
Crankshaft/Governor Gear/Oil Pump Components54
Remove Oil Pan Assembly55
Governor Assembly55
Governor Shaft Component and Details55
Oil Pump Assembly55
Remove Camshaft and Valve Tappets56
Remove Governor Cross Shaft56
Governor Cross Shaft Oil Seal Details56
Connecting Rods/Piston/Breather Components56
Connecting Rods57
Piston and Rings57
Remove Crankshaft58
Remove Flywheel and PTO End Oil Seals58
Crankcase58
Honing58
Clean Cylinder Bore after Honing59
Measuring Piston-To-Bore Clearance59
Piston Detail59
Reassembly60
Install Flywheel End Oil Seal60
Install Breather Filter and Outer Cover60
Fastener Torque Sequence and Sealant60
Install Governor Cross Shaft61
Install Crankshaft61
Install Connecting Rods with Pistons and Rings61
Piston and Connecting Rod Details61
Install Valve Tappets and Camshaft62
Install Oil Seal in Oil Pan62
Oil Seal Component and Detail62
Install Oil Pan Assembly63
Sealant Pattern63
Fastener Torque Sequence63
Install Breather Reed and Outer Cover64
Breather Cover Sealant64
Install Stator and Backing Plate64
Install Flywheel and Fan64
Assemble and Install Cylinder Heads65
Valve Stem Seals65
Install Rocker Arms65
Adjust Valve Clearance66
Install Valve Covers66
Adjusters Retaining Push Rods66
Valve Cover RTV Sealant66
Install Spark Plugs67
Install Ignition Modules68
Install Intake Manifold68
Install Inner and Outer Cylinder Bafﬂes68
Install Carburetor68
Install External Governor Controls69
Control Bracket Components69
Throttle and Choke Components69
Install Throttle and Choke Controls69
Install Blower Housing70
Install Fuel Pump70
Fuel Pump Components70
Install Oil Filter and Fill Crankcase with Oil70
Connect Spark Plug Leads71
Prepare Engine for Operation71

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