Briggs & Stratton 550ex User Manual (2024)

Briggs & Stratton 550ex User Manual (1)

en

Not for

Reproduction

Operator’s Manual

es

Manual del Operario

fr

Manuel de l’opérateur

Model 90000

ESeriest 500e Seriest EX Seriest 550e Seriest

550ex Seriest 575ex Seriest

Copyright E 2012 Briggs & Stratton Corporation, Milwaukee, WI, USA. All rights reserved. Briggs & Stratton is a registered trademark of Briggs & Stratton Corporation.

English

en

Form No. 380406TRI

Revision: B

Español Français

es fr

Briggs & Stratton 550ex User Manual (2)

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BRIGGSandSTRATTON.COM

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Briggs & Stratton 550ex User Manual (3)

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Briggs & Stratton 550ex User Manual (4)

General Information

Not for

Reproduction

This manual contains safety information to make you aware of the hazards and risks associated with engines and how to avoid them. It also contains instructions for the proper use and care of the engine. Because Briggs & Stratton Corporation does not necessarily know what equipment this engine will power, it is important that you read and understand these instructions and the instructions for the equipment. Save these

original instructions for future reference.

For replacement parts or technical assistance, record below the engine model, type, and code numbers along with the date of purchase. These numbers are located on your engine (see the Features and Controls page).

WARNING indicates a hazard which, if not avoided, could result in death or

serious injury.

CAUTION indicates a hazard which, if not avoided, could result in minor or

moderate injury.

NOTICE indicates a situation that could result in damage to the product.

Date of purchase:

Engine model:

Model: Code:Type:

Look for the 2D barcode located on the engine. When viewed with a 2D--capable device, the code will bring up our website where you can access support information for this product. Data rates apply. Some countries may not have online support information available.

MM/DD/YYYY

WARNING

Certain components in this product and its related accessories contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands after handling.

WARNING

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

WARNING

Briggs & Stratton Engines are not designed for and are not to be used to power: fun-karts; go-karts; children’s, recreational, or sport all-terrain vehicles (ATVs); motorbikes; hovercraft; aircraft products; or vehicles used in competitive events not sanctioned by Briggs & Stratton. For information about competitive racing products, see www.briggsracing.com. For use with utility and side-by-side ATVs, please contact Briggs & Stratton Engine Application Center, 1-866-927-3349. Improper engine

Power Rating

The gross power rating for individual gas engine models is labeled in accordance with SAE (Society of Automotive Engineers) code J1940 (Small Engine Power & Torque Rating Procedure), and rating performance has been obtained and corrected in accordance with SAE J1995 (Revision 2002--05). Torque values are derived at 3060 RPM; horsepower values are derived at 3600 RPM. The gross power curves can be viewed at www.BRIGGSandSTRATTON.COM. Net power values are taken with exhaust and air cleaner installed whereas gross power values are collected without these attachments. Actual gross engine power will be higher than net engine power and is affected by, among other things, ambient operating conditions and engine--to--engine variability. Given the wide array of products on which engines are placed, the gas engine may not develop the rated gross power when used in a given piece of power equipment. This difference is due to a variety of factors including, but not limited to, the variety of engine components (air cleaner, exhaust, charging, cooling, carburetor, fuel pump, etc.), application limitations, ambient operating conditions (temperature, humidity, altitude), and engine--to--engine variability. Due to manufacturing and capacity limitations, Briggs & Stratton may substitute an engine of higher rated power for this Series engine.

Operator Safety

SAFETY AND CONTROL SYMBOLS

Fire

Fast

Choke

Hazardous

Chemical

Moving Parts

Stop

On Off

Read Manual

Oil

Explosion

Fuel Shutoff

Hot Surface

Toxic Fumes

Shock

Kickback

Frostbite

Slow

Fuel

Wear Eye

Protection

The safety alert symbol is used to identify safety information about hazards that can result in personal injury. A signal word (DANGER, WARNING, or CAUTION) is used with the alert symbol to indicate the likelihood and the potential severity of injury. In addition, a hazard symbol may be used to represent the type of hazard.

DANGER indicates a hazard which, if not avoided, will result in death or

serious injury.

application may result in serious injury or death.

NOTICE: This engine was shipped from Briggs & Stratton without oil. Before you start the engine, make sure you add oil according to the instructions in this manual. If you start the engine without oil, it will be damaged beyond repair and will not be covered under warranty.

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Adding Fuel

Turn engine off and let engine cool at least 2 minutes before removing the fuel

cap.

Fill fuel tank outdoors or in well-ventilated area.Do not o verfill fuel tank. To allow for expansion of the fuel, do not fill above the

bottom of the fuel tank neck.

Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition

sources.

Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.

Replace if necessary

If fuel spills, wait until it evaporates before starting engine.

When Starting Engine

Ensure that spark plug, muffler, fuel cap and air cleaner (if equipped) are in

place and secured.

Do not crank engine with spark plug removed.If engine floods, set choke (if equipped) to OPEN/RUN position, move throttle

(if equipped) to FAST position and crank until engine starts.

When Operating Equipment

Do not tip engine or equipment at angle which causes fuel to spill.Do not choke the carburetor to stop engine.Never start or run the engine with the air cleaner assembly (if equipped) or the

air filter (if equipped) removed.

When Changing Oil

When you drain the oil from the top oil fill tube, the fuel tank must be empty or

fuel can leak out and result in a fire or explosion.

When Tipping Unit for Maintenance

When performing maintenance that requires the unit to be tipped, the fuel tank

must be empty or fuel can leak out and result in a fire or explosion.

When Transporting Equipment

Transport with fuel tank EMPTY or with fuel shut-off valve OFF.

When Storing Fuel Or Equipment With Fuel In Tank

Store away from furnaces, stoves, water heaters or other appliances that have

pilot lights or other ignition sources because they can ignite fuel vapors.

4 BRIGGSandSTRATTON.COM

Briggs & Stratton 550ex User Manual (5)

WARNING

Not for

Reproduction

Starting engine creates sparking. Sparking can ignite nearby flammable gases. Explosion and fire could result.

If there is natural or LP gas leakage in area, do not start engine.Do not use pressurized starting fluids because vapors are flammable.

WARNING

Engines give off carbon monoxide, an odorless, colorless, poison gas. Breathing carbon monoxide can cause nausea, fainting or death.

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

WARNING

Rapid retraction of starter cord (kickback) will pull hand and arm toward engine faster than you can let go.

Broken bones, fractures, bruises or sprains could result.

When starting engine, pull the starter cord slowly until resistance is felt and then

pull rapidly to avoid kickback.

Remove all external equipment/engine loads before starting engine.Direct-coupled equipment components such as, but not limited to, blades,

impellers, pulleys, sprockets, etc., must be securely attached.

WARNING

Rotating parts can contact or entangle hands, feet, hair, clothing, or accessories.

Traumatic amputation or severe laceration can result.

Operate equipment with guards in place.Keep hands and feet away from rotating parts.Tie up long hair and remove jewelry.Do not wear loose-fitting clothing, dangling drawstrings or items that could

become caught.

WARNING

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

Severe thermal burns can occur on contact. Combustible debris, such as leaves, grass, brush, etc. can catch fire.

Allow muffler, engine cylinder and fins to cool before touching.Remove accumulated debris from muffler area and cylinder area.It is a violation of California Public Resource Code, Section 4442, to use or

operate the engine on any forest-covered, brush-covered, or grass-covered land unless the exhaust system is equipped with a spark arrester, as defined in Section 4442, maintained in effective working order. Other states or federal jurisdictions may have similar laws. Contact the original equipment manufacturer, retailer, or dealer to obtain a spark arrester designed for the exhaust system installed on this engine.

WARNING

Unintentional sparking can result in fire or electric shock. Unintentional start-up can result in entanglement, traumatic

amputation, or laceration. Fire hazard

Before performing adjustments or repairs:

Disconnect the spark plug wire and keep it away from the spark plug.Disconnect battery at negative terminal (only engines with electric start.)Use only correct tools.Do not tamper with governor spring, links or other parts to increase engine

speed.

Replacement parts must be of the same design and installed in the same

position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury.

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

may later shatter during operation.

When testing for spark:

Use approved spark plug tester.Do not check for spark with spark plug removed.

en

5

Briggs & Stratton 550ex User Manual (6)

Features and Controls

Not for

Reproduction

Compare the illustration various features and controls.

A. Engine Identification

Model Type Code

B. Spark Plug C. Primer (optional) D. Fuel Tank and Cap E. Air Cleaner F. Starter Cord Handle G. Dipstick H. Muffler

Muffler Guard (optional) Spark Arrester (optional)

I. Throttle Control (optional) J. Finger Guard

1

with your engine to familiarize yourself with the location of

To protect the fuel system from gum formation, mix a fuel stabilizer into the fuel. See Storage. All fuel is not the same. If starting or performance problems occur, change fuel providers or change brands. This engine is certified to operate on gasoline. The emissions control system for this engine is EM (Engine Modifications).

High Altitude

At altitudes over 5,000 feet (1524 meters), a minimum 85 octane/85 AKI (89 RON) gasoline is acceptable. To remain emissions compliant, high altitude adjustment is required. Operation without this adjustment will cause decreased performance, increased fuel consumption, and increased emissions. See an authorized Briggs & Stratton Dealer for high altitude adjustment information.

Operation of the engine at altitudes below 2,500 feet (762 meters) with the high altitude kit is not recommended.

How To Add Fuel - Figure

3

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

Operation

Oil capacity (see the Specifications section)

Oil Recommendations

We recommend the use of Briggs & Stratton Warranty Certified oils for best performance. Other high-quality detergent oils are acceptable if classified for service SF, SG, SH, SJ or higher. Do not use special additives.

Outdoor temperatures determine the proper oil viscosity for the engine. Use the chart to select the best viscosity for the outdoor temperature range expected.

When Adding Fuel

Turn engine off and let engine cool at least 2 minutes before removing the fuel

cap.

Fill fuel tank outdoors or in well-ventilated area.Do not o verfill fuel tank. To allow for expansion of the fuel, do not fill above the

bottom of the fuel tank neck.

Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition

sources.

Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.

Replace if necessary

If fuel spills, wait until it evaporates before starting engine.

1. Clean the fuel cap area of dirt and debris. Remove the fuel cap (A, Figure 3).

2. Fill the fuel tank (B) with fuel. To allow for expansion of the fuel, do not fill above the bottom of the fuel tank neck (C).

3. Reinstall the fuel cap.

How To Start The Engine

WARNING

Rapid retraction of starter cord (kickback) will pull hand and arm toward engine faster than you can let go.

Broken bones, fractures, bruises or sprains could result.

When starting engine, pull the starter cord slowly until resistance is felt and then

pull rapidly to avoid kickback.

* Below 40°F(4°C) the use of SAE 30 will result in hard starting. ** Above 80°F(27°C) the use of 10W-30 may cause increased oil consumption. Check

oil level more frequently.

How To Check/Add Oil - Figure

Before adding or checking the oil

Place engine level.Clean the oil fill area of any debris.

1. Remove the dipstick (A) and wipe with a clean cloth (Figure 2).

2. Insert and tighten the dipstick.

3. Remove the dipstick and check the oil level. It should be at the top of the full indicator (B) on the dipstick.

4. If low, add oil slowly into the engine oil fill (C). Do not overfill. After adding oil, wait one minute and then recheck the oil level.

5. Replace and tighten the dipstick.

Fuel Recommendations

Fuel must meet these requirements:

Clean, fresh, unleaded gasoline.A minimum of 87 octane/87 AKI (91 RON). High altitude use, see below.Gasoline with up to 10% ethanol (gasohol) is acceptable.

CAUTION: Do not use unapproved gasolines, such as E15 and E85. Do not mix oil in gasoline or modify the engine to run on alternate fuels. Use of unapproved fuels will damage the engine components and void the engine warranty.

2

NOTICE: This engine was shipped from Briggs & Stratton without oil. Before you start the engine, make sure you add oil according to the instructions in this manual. If you start the engine without oil, it will be damaged beyond repair and will not be covered under warranty.

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Starting Engine

Ensure that spark plug, muffler, fuel cap and air cleaner (if equipped) are in

place and secured.

Do not crank engine with spark plug removed.If engine floods, set choke (if equipped) to OPEN/RUN position, move throttle

(if equipped) to FAST position and crank until engine starts.

WARNING

Engines give off carbon monoxide, an odorless, colorless, poison gas. Breathing carbon monoxide can cause nausea, fainting or death.

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

6 BRIGGSandSTRATTON.COM

Briggs & Stratton 550ex User Manual (7)

Determine The Starting System

Not for

Reproduction

Before starting the engine, you must determine the type of starting system that is on your engine. Your engine will have one of the following types.

ReadyStart

does not have a manual choke or a primer.

Primer System: This features a red primer to be used for starting in cool

temperatures. It does not have a manual choke.

To start your engine, follow the instructions for your type of starting system. Note: Equipment may have remote controls. See the equipment manual for location and

operation of remote controls.

ReadyStart®System - Figure

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

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

3. Move the throttle control (C, Figure 4) to the fast in the fast

4. If the product is equipped with an engine stop lever (D), hold the engine stop lever against the handle (Figure 5).

5. Firmly hold the starter cord handle (E). Pull the starter cord handle slowly until resistance is felt, then pull rapidly (Figure 4).

Note: If the engine does not start after repeated attempts, go to BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA).

®

System: This features a temperature controlled automatic choke. It

4 5

position. Operate the engine

position.

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

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 slowly until resistance is felt and then pull rapidly to avoid kickback.

Primer System - Figure

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

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

3. Move the throttle control (C, Figure 6) to the fast in the fast

4. Push the red primer (F) three times.

Note: Priming is usually unnecessary when restarting a warm engine. Note: If you push the primer too many times, excessive fuel will flood the carburetor

and the engine will be difficult to start.

5. If the product is equipped with an engine stop lever (D), hold the engine stop lever against the handle (Figure 5).

6. Firmly hold the starter cord handle (E). Pull the starter cord handle slowly until resistance is felt, then pull rapidly (Figure 6).

Note: If the engine does not start after repeated attempts, repeat Steps 4, 5, and 6. If it still does not start, go to BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA).

position.

5 6

position. Operate the engine

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

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 slowly until resistance is felt and then pull rapidly to avoid kickback.

Maintenance

NOTICE: If the engine is tipped during maintenance, the fuel tank must be empty and

thesparkplugsidemust be up. If the fuel tank is not empty and if the engine is tipped in any other direction, it may be difficult to start due to oil or gasoline contaminating the air filter and/or the spark plug.

WARNING: When performing maintenance that requires the unit to be

tipped, the fuel tank must be empty or fuel can leak out and result in a fire or explosion.

We recommend that you see any Briggs & Stratton Authorized Dealer for all maintenance and service of the engine and engine parts.

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

Emissions Control

Maintenance, replacement, or repair of the emissions control devices and systems may be performed by any non-road engine repair establishment or individual.

However, to obtain “no charge” emissions control service, the work must be performed by a factory authorized dealer. See the Emissions Warranty.

WARNING

Unintentional sparking can result in fire or electric shock. Unintentional start-up can result in entanglement, traumatic

amputation, or laceration. Fire hazard

Before performing adjustments or repairs:

Disconnect the spark plug wire and keep it away from the spark plug.Disconnect battery at negative terminal (only engines with electric start.)Use only correct tools.Do not tamper with governor spring, links or other parts to increase engine

speed.

Replacement parts must be of the same design and installed in the same

position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury.

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

may later shatter during operation.

When testing for spark:

Use approved spark plug tester.Do not check for spark with spark plug removed.

Maintenance Chart

First 5 Hours

Change oil

Every8HoursorDaily

Check engine oil levelClean area around muffler and controlsClean finger guard

Every 25 Hours or Annually

Clean air filter *

Every 50 Hours or Annually

Change engine oilCheck muffler and spark arrester

Annually

Replace air filterReplace spark plugClean air cooling system *

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

How To Stop The Engine - Figure

Release the engine stop lever (A, Figure 5)

Engine with Throttle Control: Move the throttle control (B, Figure 7) to the stop

position.

or

5 7

en

Carburetor Adjustment

Never make adjustments to the carburetor. The carburetor was set at the factory to operate efficiently under most conditions. However, if adjustments are required, see any Briggs & Stratton Authorized Dealer for service.

NOTICE: The manufacturer of the equipment on which this engine is installed specifies the top speed at which the engine will be operated. Do not exceed this speed.

7

Briggs & Stratton 550ex User Manual (8)

Inspect Muffler And Spark Arrester - Figure

Not for

Reproduction

1

WARNING

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

Severe thermal burns can occur on contact. Combustible debris, such as leaves, grass, brush, etc. can catch fire.

Allow muffler, engine cylinder and fins to cool before touching.Remove accumulated debris from muffler area and cylinder area.It is a violation of California Public Resource Code, Section 4442, to use or

operate the engine on any forest-covered, brush-covered, or grass-covered land unless the exhaust system is equipped with a spark arrester, as defined in Section 4442, maintained in effective working order. Other states or federal jurisdictions may have similar laws. Contact the original equipment manufacturer, retailer, or dealer to obtain a spark arrester designed for the exhaust system installed on this engine.

Remove accumulated debris from muffler area and cylinder area. Inspect the muffler (H, Figure 1) for cracks, corrosion, or other damage. Remove the spark arrester, if equipped, and inspect for damage or carbon blockage. If damage is found, install replacement parts before operating.

WARNING: Replacement parts must be of the same design and installed

in the same position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury.

How To Replace The Spark Plug - Figure

Check the gap (A, Figure 8) with a wire gauge (B). If necessary, reset the gap. Install and tighten the spark plug to the recommended torque. For gap setting or torque, see the Specifications section.

Note: In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this engine was originally equipped with a resistor spark plug, use the same type for replacement.

How To Change The Oil - Figure

9 10 11

8

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When you drain the oil from the top oil fill tube, the fuel tank must be empty or

fuel can leak out and result in a fire or explosion.

Used oil is a hazardous waste product and must be disposed of properly. Do not discard with household waste. Check with your local authorities, service center, or dealer for safe disposal/recycling facilities.

Remove Oil

The oil must be drained from the top oil fill tube (E, Figure 10).

1. With engine off but still warm, disconnect the spark plug wire (A) and keep it away from the spark plug (Figure 9).

2. Remove the dipstick (G, Figure 11).

3. When you drain the oil from the top oil fill tube (E), keep the spark plug end of the engine (F) up (Figure 10). Drain the oil into an approved container.

WARNING: When you drain the oil from the top oil fill tube, the fuel tank

must be empty or fuel can leak out and result in a fire or explosion. To empty the fuel tank, run the engine until it stops from lack of fuel.

Add Oil

Place engine level.Clean the oil fill area of any debris.See the Specifications section for oil capacity.

1. Remove the dipstick (G) and wipe with a clean cloth (Figure 11).

2. Pour the oil slowly into the engine oil fill (H). Do not overfill. After adding oil, wait one minute and then check the oil level.

3. Install and tighten the dipstick.

4. Remove the dipstick and check the oil level. It should be at the top of the full indicator (J) on the dipstick.

5. Install and tighten the dipstick.

How To Service The Air Filter - Figure

12 13

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

Never start or run the engine with the air cleaner assembly (if equipped) or the

air filter (if equipped) removed.

NOTICE: Do not use pressurized air or solvents to clean the filter. Pressurized air can damage the filter and solvents will dissolve the filter.

Two types of air filter systems are shown, a Standard and a High Capacity. Determine the type installed on your engine and service as follows.

Standard Air Filter - Figure

The air cleaner system uses a foam element that can be washed and reused.

1. Open the cover (B, Figure 12).

2. Remove the foam element (C).

3. Wash the foam element in liquid detergent and water. Squeeze dry the foam element in a clean cloth.

4. Saturate the foam element with clean engine oil. To remove the excess engine oil, squeeze the foam element in a clean cloth.

5. Install the foam element (C).

6. Close the cover (B).

High Capacity Air Filter - Figure

The air cleaner system uses a pleated filter.

1. Open the cover (B, Figure 13).

2. Remove the filter (D).

3. To loosen debris, gently tap the filter on a hard surface. If the filter is excessively dirty, replace with a new filter.

4. Install the filter (D).

5. Close the cover (B).

How To Clean The Air Cooling System - Figure

12

13

14

WARNING

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

Severe thermal burns can occur on contact. Combustible debris, such as leaves, grass, brush, etc. can catch fire.

Allow muffler, engine cylinder and fins to cool before touching.Remove accumulated debris from muffler area and cylinder area.

NOTICE: Do not use water to clean the engine. Water could contaminate the fuel system. Use a brush or dry cloth to clean the engine.

This is an air cooled engine. Dirt or debris can restrict air flow and cause the engine to overheat, resulting in poor performance and reduced engine life.

Use a brush or dry cloth to remove debris from the finger guard (A). Keep linkage, springs and controls (B) clean. Keep the area around and behind the muffler (C)freeof any combustible debris (Figure 14).

8

BRIGGSandSTRATTON.COM

Briggs & Stratton 550ex User Manual (9)

Storage

Not for

Reproduction

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Storing Fuel Or Equipment With Fuel In Tank

Store away from furnaces, stoves, water heaters or other appliances that have

pilot lights or other ignition sources because they can ignite fuel vapors.

Fuel System

Fuel can become stale when stored over 30 days. Stale fuel causes acid and gum deposits to form in the fuel system or on essential carburetor parts. To keep fuel fresh, use Briggs & Stratton Advanced Formula Fuel Treatment & Stabilizer, available wherever Briggs & Stratton genuine service parts are sold.

For engines equipped with a FRESH START

®

available in a drip concentrate cartridge.

START

There is no need to drain gasoline from the engine if a fuel stabilizer is added according to instructions. Run the engine for 2 minutes to circulate the stabilizer throughout the fuel system before storage.

If gasoline in the engine has not been treated with a f uel stabilizer, it must be drained into an approved container. Run the engine until it stops from lack of fuel. The use of a fuel stabilizer in the storage container is recommended to maintain freshness.

Engine Oil

While the engine is still warm, change the engine oil. NOTICE: Store the engine level (normal operating position). If the engine is tipped for

storage, the fuel tank must be empty and the spark plug side must be up. If the fuel tank is not empty and if the engine is tipped in any other direction, it may be difficult to start due to oil or gasoline contaminating the air filter and/or the spark plug.

®

fuel cap, use Briggs & Stratton FRESH

Troubleshooting

Need Assistance? Go to BRIGGSandSTRATTON.COM or call 1-800-233-3723.

Specifications

Engine Specifications

Model 90000

Displacement 8.54 ci (140 cc)

Bore 2.496 in (63.4 mm)

Stroke 1.75 in (44.45 mm)

Oil Capacity 15 oz (0.44 L)

Tune-up Specifications *

Model 90000

Spark Plug Gap 0.020 in (0.51 mm)

Spark Plug Torque 180 lb-in (20 Nm)

Armature Air Gap 0.006 - 0.014 in (0.15 - 0.36 mm)

Intake Valve Clearance 0.004 - 0.008 in (0.10 - 0.20 mm)

Exhaust Valve Clearance 0.004 - 0.008 in (0.10 - 0.20 mm)

* Engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea level and 1% for each 10F(5.6 C) above 77 F(25 C). The engine will operate satisfactorily at an angle up to 15. Refer to the equipment operator’s manual for safe allowable operating limits on slopes.

Common Service Parts n

Service Part Part Number

Air Filter, Standard 799579

Air Filter, High Capacity 798452

Oil -- SAE 30 100005

Fuel Additive 5041, 5058

Resistor Spark Plug 692051

Spark Plug Wrench 19576

Spark Tester 19368

n We recommend that you see any Briggs & Stratton Authorized Dealer for all maintenance and service of the engine and engine parts.

en

9

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Briggs & Stratton 550ex User Manual (2024)

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