Kohler KT725

jefferycoxAug 25, 2025

Why Kohler Engine loses power?

L
Lacey CarsonAug 26, 2025
If your Kohler Engine loses power, start by cleaning or replacing the air cleaner element. Ensure the engine isn't overheating by allowing it to cool down. Reduce the engine load if it's excessive. Inspect and clear any restrictions in the exhaust system. Check and replace the spark plug(s) if faulty. Verify and adjust the crankcase oil level if it's too high. Adjust the governor setting if it's incorrect. If the battery is low, charge or replace it. Inspect the engine for compression issues if compression is low. Check and refill the crankcase oil if the level is low. Finally, replace the fuel with fresh quality fuel to rule out fuel issues.

Displacement	725 cc
Compression Ratio	8.5:1
Fuel System	Carburetor
Governor Type	Mechanical
Ignition System	Electronic
Cooling System	Air
Bore x Stroke	3.3 x 2.6 in. (83 x 67 mm)
Oil Capacity	2.1 U.S. qt (2.0 L)
Lubrication	Full Pressure with Filter

Displacement

725 cc

Compression Ratio

8.5:1

Fuel System

Carburetor

Governor Type

Mechanical

Ignition System

Electronic

Cooling System

Air

Bore x Stroke

3.3 x 2.6 in. (83 x 67 mm)

Oil Capacity

2.1 U.S. qt (2.0 L)

Lubrication

Full Pressure with Filter

Summary

Maintenance Procedures and Schedule

Maintenance Schedule by Hours

Outlines maintenance tasks based on operating hours.

Oil Recommendations

Details recommended engine oil types and viscosity based on temperature.

Storage Procedures

Instructions for preparing the engine for extended storage periods.

Technical Specifications

Engine Dimensions

Provides detailed measurements for engine configurations with different air cleaners.

Engine Identification Numbers

Explains how to identify engine model, specification, and serial numbers for service.

General Specifications

Lists key engine parameters such as bore, stroke, displacement, and oil capacity.

Torque Specifications

Lists torque values for various fasteners and components during assembly/disassembly.

Clearance Specifications

Details critical internal component clearances for proper engine function and wear assessment.

Tools and Aids for Service

Recommended Service Tools

Lists specialized tools and their sources for engine service and repair.

Service Aids and Lubricants

Lists approved lubricants, sealants, and other service aids for engine maintenance.

Troubleshooting Engine Issues

Starting and Running Problems

Categorizes common engine problems related to starting, running, and idle speed.

Engine Performance Issues

Lists causes for power loss, excessive oil consumption, and oil leaks from engine components.

Crankcase Vacuum Test Procedure

Provides a procedure to test crankcase vacuum and diagnose related issues.

Compression and Leakdown Tests

Explains how to perform compression and cylinder leakdown tests to assess engine internal condition.

Air Cleaner and Intake System

Air Cleaner Components and Service

Details the components of the air cleaner system and procedures for servicing the precleaner and paper element.

Air Cleaner Base Removal

Outlines the steps for removing the air cleaner base and associated components for service.

Fuel System Operation and Service

Fuel Pump and System Tests

Covers fuel pump replacement, testing fuel system components, and troubleshooting fuel delivery issues.

Carburetor Troubleshooting and Adjustments

Provides a checklist for carburetor issues and procedures for idle and high-speed adjustments.

Smart-Choke and eChoke Systems

Explains the operation and components of automatic choke systems for improved starting and performance.

Governor System Details

Governor Components and Operation

Describes the governor system's function, components, and how it maintains engine speed under varying loads.

Governor Adjustments

Details the procedure for initial adjustment of the governor arm and linkage to ensure proper engine speed control.

Lubrication System

Oil Level Check and Change

Provides instructions on checking engine oil level and procedures for changing the oil and oil filter.

Oil Sentry System Testing

Explains the function and testing procedure for the low oil pressure safety switch.

Electrical System Components and Service

Spark Plug Service and Inspection

Details how to inspect, clean, gap, and replace spark plugs for optimal engine performance.

Battery Maintenance and Testing

Covers battery maintenance, testing procedures, and recommended battery capacities based on temperature.

Ignition System Operation and Testing

Explains the electronic ignition system and provides procedures for testing ignition modules and components.

Starter System Service

Starting Difficulties Troubleshooting

Lists common starting problems and their potential causes and solutions.

Solenoid Shift Starter Service

Details the disassembly, inspection, and reassembly procedures for solenoid shift starters.

Solenoid Tests

Provides step-by-step instructions for testing the starter solenoid's actuation and continuity.

Emission Compliant Systems

Evaporative Emission Control System

Describes the carbon canister system for managing fuel vapors and its maintenance.

Secondary Air Induction System

Explains the operation and maintenance of the secondary air induction system for emission control.

Disassembly, Inspection, and Service

External Engine Component Removal

Outlines procedures for removing major external components like the air cleaner, carburetor, and fuel pump.

Cylinder Head and Valve Service

Details the process for removing, disassembling, and inspecting cylinder heads and valve components.

Piston and Ring Service

Covers the inspection and installation procedures for pistons and piston rings, including critical clearances.

Crankshaft and Bearing Inspection

Explains how to inspect the crankshaft, bearings, and cylinder bore for wear and damage.

Reassembly Procedures

Crankshaft and Governor Gear Installation

Provides steps for installing the crankshaft, governor gear, and related components into the crankcase.

Piston and Connecting Rod Assembly

Details the correct procedure for installing pistons, connecting rods, and rings, ensuring proper orientation.

Cylinder Head and Valve Reassembly

Guides the user through the process of assembling cylinder heads, installing valves, and adjusting valve clearance.

Carburetor Installation

Outlines the steps for installing the carburetor, including connections for choke and fuel systems.

Table of Contents

Questions and Answers:

Kohler KT725 Specifications