Wacker Neuson WM 650, WM 720 Operator's Manual

0163728en 002
0807

Engine

WM 650
WM 720

OPERATOR’S MANUAL

0163728EN

WM 650 / WM 720 Table of Contents

1. Foreword 4

2. Emission Control System Information 5

3. Safety Information 16

3.1 Laws Pertaining to Spark Arresters .................................................... 16

3.2 Operating Safety ................................................................................ 17

3.3 Operator Safety while using Internal Combustion Engines ................ 18

3.4 Service Safety .................................................................................... 19

3.5 Safety Labels ...................................................................................... 20

4. Operation 21

4.1 Recommended Fuel ........................................................................... 21

4.2 Before Starting ................................................................................... 21

4.3 To Start / To Stop ............................................................................... 21

5. Maintenance 22

5.1 Periodic Maintenance Schedule (WM 650) ........................................ 22

5.2 Periodic Maintenance Schedule (WM 720) ........................................ 23

5.3 Spark Plug .......................................................................................... 24

5.4 Engine Oil and Filter ........................................................................... 25

5.5 Air Cleaner ......................................................................................... 26

5.6 Storage ............................................................................................... 27

6. Technical Data 28

3

WARNING

1. Foreword

CALIFORNIA

Proposition 65 Warning:

Engine exhaust, some of its constituents, and certain vehicle
components, contain or emit chemicals known to the State of
California to cause cancer and birth defects or other reproductive
harm.

This manual provides information and procedures to safely operate
and maintain this Wacker model. For your own safety and protection
from injury, carefully read, understand and observe the safety
instructions described in this manual.

Keep this manual or a copy of it with the machine. If you lose this
manual or need an additional copy, please contact Wacker
Corporation. This machine is built with user safety in mind; however,
it can present hazards if improperly operated and serviced. Follow
operating instructions carefully! If you have questions about operating
or servicing this equipment, please contact Wacker Corporation.

The information contained in this manual was based on machines in
production at the time of publication. Wacker Corporation reserves the
right to change any portion of this information without notice.

All rights, especially copying and distribution rights, are reserved.

Copyright 2007 by Wacker Corporation.

No part of this publication may be reproduced in any form or by any
means, electronic or mechanical, including photocopying, without
express written permission from Wacker Corporation.

Any type of reproduction or distribution not authorized by Wacker
Corporation represents an infringement of valid copyrights and will be
prosecuted. We expressly reserve the right to make technical
modifications, even without due notice, which aim at improving our
machines or their safety standards.

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Emission Control System Information WM 650 / WM 720

2. Emission Control System Information

Source of Emissions

The combustion process produces carbon monoxide, oxides of
nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of
nitrogen is very important because, under certain conditions, they
react to form photochemical smog when subjected to sunlight. Carbon
monoxide does not react in the same way, but it is toxic.

Wacker utilizes lean carburetor settings and other systems to reduce
the emissions of carbon monoxide, oxides of nitrogen, and
hydrocarbons.

The U.S. and California Clean Air Acts

EPA and California regulations require all manufacturers to furnish
written instructions describing the operation and maintenance of
emission control systems.

The following instructions and procedures must be followed in order to
keep the emissions from your Wacker engine within the emissions
standards.

Tampering and Altering

Tampering with or altering the emission control system may increase
emissions beyond the legal limit. Among those acts that constitute
tampering are:

•Removal or alteration of any part of the intake, fuel, or exhaust
systems.

•Altering or defeating the speed-adjusting mechanism to cause the
engine to operate outside its design parameters.

Problems That May Affect Emissions

If you are aware of any of the following symptoms, have your engine
inspected and repaired by your servicing dealer.

•Hard starting or stalling after starting.

•Rough idle.

•Misfiring or backfiring under load.

•Afterburning (backfiring).

•Black exhaust smoke or high fuel consumption.

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WM 650 / WM 720 Emission Control System Information

Replacement Parts

The emission control systems on your Wacker engine were designed,
built, and certified to conform with EPA and California emissions
regulations. We recommend the use of genuine Wacker parts
whenever you have maintenance done. These original-design
replacement parts are manufactured to the same standards as the
original parts, so you can be confident of their performance. The use
of replacement parts that are not of the original design and quality may
impair the effectiveness of your emission control system.

A manufacturer of an aftermarket part assumes the responsibility that
the part will not adversely affect emission performance. The
manufacturer or rebuilder of the part must certify that use of the part
will not result in a failure of the engine to comply with emission
regulations.

Maintenance

Follow the maintenance schedule. Remember that this schedule is
based on the assumption that your machine will be used for its
designed purpose. Sustained high-load or high-temperature operation,
or use in unusually wet or dusty conditions, will require more frequent
service.

OXYGENATED FUELS

Some conventional gasolines are being blended with alcohol or an
ether compound. These gasolines are collectively referred to as
oxygenated fuels. To meet clean air standards, some areas of the
United States and Canada use oxygenated fuels to help reduce
emissions.

If you use an oxygenated fuel, be sure it is unleaded and meets the
minimum octane rating requirement.

Before using an oxygenated fuel, try to confirm the fuel’s contents.
Some States / Provinces require this information to be posted on the
pump.

The following are EPA-approved percentages of oxygenates:
ETHANOL - (ethyl or grain alcohol) 10% by volume. You may use

gasoline containing up to 10% ethanol by volume. Gasoline containing
ethanol may be marketed under the name “Gasohol”.

MTBE - (methyl tertiary butyl ether) 15% by volume. You may use
gasoline containing up to 15% MTBE by volume.

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Emission Control System Information WM 650 / WM 720

METHANOL - (methyl or wood alcohol) 5% by volume. You may use

gasoline containing up to 5% methanol by volume, as long as it
contains cosolvents and corrosion inhibitors to protect the fuel system.
Gasoline containing more than 5% methanol by volume may cause
starting and/or performance problems. It may also damage metal,
rubber, and plastic parts of your fuel system.

If you notice any undesirable operating symptoms, try another service
station, or switch to another brand of gasoline.

Fuel system damage or performance problems resulting from the use
of an oxygenated fuel containing more than the percentages of
oxygenates mentioned above are not covered under warranty.

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WM 650 / WM 720 Emission Control System Information

EMISSIONS COMPONENT DEFECT WARRANTY COVERAGE

This emission warranty is applicable in all States, except the State of
California.

Wacker Corporation, N92 W15000 Anthony Avenue, Menomonee
Falls, WI 53051-1504, (herein "Wacker") warrant(s) to the initial retail
purchaser and each subsequent owner, that this non-road engine
(herein "engine") has been designed, built, and equipped to conform
at the time of initial sale to all applicable regulations of the U.S.
Environmental Protection Agency (EPA), and that the engine is free of
defects in materials and workmanship which would cause this engine
to fail to conform with EPA regulations during its warranty period.

For the components listed under PARTS COVERED, the service
dealer authorized by Wacker will, at no cost to you, make the
necessary diagnosis, repair, or replacement necessary to ensure that
the engine complies with applicable U.S. EPA regulations.

EMISSISON COMPONENT DEFECT WARRANTY PERIOD

The warranty period for this engine begins on the date of sale to the
initial purchaser and continues for a period of 2 years.

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Emission Control System Information WM 650 / WM 720

PARTS COVERED

Listed below are the parts covered by the Emission Components
Defect Warranty. Some of the parts listed below may require
scheduled maintenance and are warranted up to the first scheduled
replacement point for that part.

(1) Fuel Metering System

(i) Carburetor and internal parts (and/or pressure regulator or fuel

injection system).
(ii) Air/fuel ratio feedback and control system, if applicable.
(iii) Cold start enrichment system, if applicable.
(iv) Regulator assembly (gaseous fuel, if applicable) .

(2) Air Induction System

(i) Intake manifold, if applicable.
(ii) Air filter.

(3) Ignition System

(i) Spark plugs.
(ii) Magneto or electronic ignition system.
(iii) Spark advance/retard system, if applicable.

(4) Exhaust manifold, if applicable
(5) Miscellaneous Items Used in Above Systems

(i) Electronic controls, if applicable.
(ii) Hoses, belts, connectors, and assemblies.
(iii) Filter lock assembly (gaseous fuel, if applicable).

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