Briggs&Stratton 300000: Not for Reproduction

Emissions Control

Maintenance, replacement, or repair of the emissions control devices and systems

WARNING

may be performed by any non-road engine repair establishment or individual.

Engines give off carbon monoxide, an odorless, colorless, poison gas.

However, to obtain “no charge” emissions control service, the work must be performed

Breathing carbon monoxide can cause nausea, fainting or death.

by a factory authorized dealer. See the Emissions Warranty.

• Start and run engine outdoors.

• Do not start or run engine in enclosed area, even if doors or windows are open.

WARNING

Unintentional sparking can result in fire or electric shock.

NOTICE: This engine was shipped from Briggs & Stratton without oil. Before you start

Unintentional start-up can result in entanglement, traumatic

the engine, make sure you add oil according to the instructions in this manual. If you

amputation, or laceration.

start the engine without oil, it will be damaged beyond repair and will not be covered

Fire hazard

under warranty.

Note: Some engines and equipment have remote controls. See the equipment manual

for location and operation of remote controls.

1. Check the oil level. See the How To Check/Add Oil section.

Before performing adjustments or repairs:

• Disconnect the spark plug wire and keep it away from the spark plug.

2. Make sure equipment drive controls, if equipped, are disengaged.

• Disconnect battery at negative terminal (only engines with electric start.)

3. Turn the fuel shut-off valve (A), if equipped, to the on position (Figure 4).

• Use only correct tools.

4. Push the stop switch (F), if equipped, to the on position.

• Do not tamper with governor spring, links or other parts to increase engine

speed.

5. Move the throttle control (B)tothefast

position. Operate the engine in the fast

• Replacement parts must be the same and installed in the same position as the

position.

original parts.

• Do not strike the flywheel with a hammer or hard object because the flywheel

6. Move the choke control (C) to the choke

position.

may later shatter during operation.

Note: Choke is usually unnecessary when restarting a warm engine.

When testing for spark:

• Use approved spark plug tester.

7. Rewind Start: Turn the key switch (D), if equipped, to the run position.

• Do not check for spark with spark plug removed.

8. Rewind Start: Firmly hold the starter c ord handle (E). Pull the starter cord handle

slowly until resistance is felt, then pull rapidly.

Note: If the engine does not start after repeated attempts, go to

BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA).

Maintenance Chart

WARNING: Rapid retraction of the starter cord (kickback) will pull your

First 5 Hours

hand and arm toward the engine faster than you can let go. Broken bones, fractures,

bruises or sprains could result. When starting engine, pull the starter cord s lowly until

• Change oil

resistance is felt and then pull rapidly to avoid kickback.

Every8HoursorDaily

9. Electric Start: Turn the electric start switch (D) to the on/start position.

• Check engine oil level

Note: If the engine does not start after repeated attempts, go to

• Clean area around muffler and controls

BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA).

Every 100 Hours or Annually

NOTICE: To extend the life of the starter, use short starting cycles (five seconds

maximum). Wait one minute between starting cycles.

• Clean air filter *

• Clean pre-cleaner (if equipped) *

10. As the engine warms up, move the choke control (C)totherun

position.

• Change engine oil and filter

• Replace spark plug

• Check muffler and spark arrester

How To Stop The Engine - Figure

4

• Check valve clearance **

Every 400 Hours or Annually

• Change air filter

WARNING

• Replace fuel filter

Gasoline and its vapors are extremely flammable and explosive.

• Clean air cooling system *

Fire or explosion can cause severe burns or death.

• Clean oil cooler fins *

* In dusty conditions or when airborne debris is present, clean more often.

• Do not choke the carburetor to stop engine.

** Not required unless engine performance problems are noted.

1. With the throttle control (B) in the slow

position, turn the key switch (D)tothe

off position (Figure 4). Remove the key and keep in a safe place out of the reach of

Carburetor Adjustment

children.

Never make adjustments to the carburetor. The carburetor was set at the factory to

2. Push the stop switch (F) to the off position.

operate efficiently under most conditions. However, if adjustments are required, see a

Briggs & Stratton Authorized Dealer for service.

3. After the engine stops, turn the fuel shut-off valve (A), if equipped, to the closed

position.

NOTICE: The manufacturer of t he equipment on which this engine is installed specifies

the top speed at which the engine will be operated. Do not exceed this speed.

Maintenance

Use only original equipment replacement parts. Other parts may not perform as

How To Replace The Spark Plug - Figure

5

well, may damage the unit, and may result in injury. In addition, use of other parts

Check the gap (A, Figure 5) with a wire gauge (B). If necessary, reset the gap. Install

may void your warranty.

and tighten the spark plug to the recommended torque. For gap setting or torque, see the

We recommend that you see any Briggs & Stratton Authorized Dealer for all

Specifications section.

maintenance and service of the engine and engine parts.

Note: In some areas, local law requires using a resistor spark plug to suppress ignition

NOTICE: All the components used to build this engine must remain in place for proper

signals. If this engine was originally equipped with a resistor spark plug, use the same

operation.

type for replacement.

8 BRIGGSandSTRATTON.COM