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Introduction

Professional Shop Manual intent

This Manual is intended to provide service dealers with an introduction to the mechanical aspects of the 25cc

P25 series of 2-cycle engines.

Disclaimer: The information contained in this manual is correct at the time of writing. Both the product and the infor-

mation about the product are subject to change without notice.

About the text format:

NOTE: is used to point out information that is relevant to the procedure, but does not fit as a step in the proce-

dure.

• Bullet points: indicate sub-steps or points.

Disclaimer: This manual is intended for use by trained, professional technicians.

• Common sense in operation and safety is assumed.

• In no event shall MTD be liable for poor text interpretation or poor execution of the procedures described

in the text.

• If the person using this manual is uncomfortable with any procedures they encounter, they should seek

the help of a qualified technician or MTD Technical Support.

Fasteners

• Most of the fasteners used on the engine are metric. Some are sized in fractional inches. For this reason,

wrench sizes are frequently identified in the text, and measurements are given in U.S. and metric scales.

• If a fastener has a locking feature that has worn, replace the fastener or apply a small amount of releas-

able thread locking compound such as Loctite® 242 (blue).

• Some fasteners like cotter pins are single-use items that are not to be reused. Other fasteners such as

lock washers, retaining rings, and internal cotter pins (hairpin clips) may be reused if the do not show

signs of wear or damage. This manual leaves that decision to the judgement of the technician.

Caution is used to point out potential danger to the technician, operator, bystanders, or sur-

rounding property.

! CAUTION! CAUTION

Warning indicates a potentially hazardous situation that, if not avoided, could result in death

or serious injury.

! WARNING! WARNING

! DANGER! DANGER

Danger indicates an imminently hazardous situation that, if not avoided, will result in death or

serious injury. This signal word is to be limited to the most extreme situations

CHAPTER 1: INTRODUCTION

For Parts Call 606-678-9623 or 606-561-4983

MTD 25cc User Manual

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