MTD 75 series - Default Chapter; Table of Contents

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Chapter 1: Introduction
Professional Service Manual Intent .................................................................. 1
Safety................................................................................................................ 1
Fasteners .......................................................................................................... 3
Assembly instructions ....................................................................................... 3
Model and serial number .................................................................................. 5
Maintenance ..................................................................................................... 5
Spark plugs ....................................................................................................... 6
Air filter .............................................................................................................. 7
Oil type and capacity......................................................................................... 8
Changing the oil .............................................................................................. 10
Fuel system ..................................................................................................... 11
Servicing the fuel system ................................................................................ 11
Fuel filter ......................................................................................................... 11
Valve lash ....................................................................................................... 13
Exhaust system ............................................................................................... 16
Cleaning the engine ........................................................................................ 16
General torque specifications ......................................................................... 16
Chapter 2: Basic Troubleshooting
Definitions ....................................................................................................... 17
Introduction ..................................................................................................... 17
Steps to troubleshooting ................................................................................. 17
Define the problem .......................................................................................... 17
Identify factors that could cause the problem ................................................. 19
Repairing the problem ..................................................................................... 23
Prime test ........................................................................................................ 24
Leak-down test ................................................................................................ 24
Compression test ............................................................................................ 26
PCV testing ..................................................................................................... 27
Troubleshooting flow charts ............................................................................ 28
Chapter 3: Air Intake systems
Snow engines ................................................................................................. 33
Heat box .......................................................................................................... 33
Chore engines ................................................................................................. 36
Air filters .......................................................................................................... 36
Air filter base and intake elbow ....................................................................... 37
Carburetor Insulator ........................................................................................ 38
Table of Contents