Vanguard 25V000, Operator'S Manual

3. If the fuel strainer is dirty, clean or replace it. If you replace the fuel strainer, make

sure to use an original equipment replacement fuel strainer.

Servicing the Cooling System

WARNING 

During operation, the engine and muffler become hot. If you touch a hot engine,

thermal burns can occur.

Combustible debris, such as leaves, grass, and brush can catch fire.

•

Before you touch the engine or muffler, stop the engine and wait two (2)

minutes. Make sure that the engine and muffler are safe to touch.

•

Remove debris from the muffler and engine.

NOTICE 

Do not use water to clean the engine. Water could cause contamination of the fuel

system. Use a brush or dry cloth to clean the engine.
This is an air cooled engine. Dirt or debris can prevent air flow and cause the engine to

become too hot and result in unsatisfactory performance and decreased engine life.

1. Use a brush or dry cloth to remove debris from the air intake grille.
2. Keep linkage, springs, and controls clean.
3. Keep the area around and behind the muffler, if equipped, free of combustible

debris.

4. Make sure the oil cooler fins, if equipped, are clean.
After a period of time, the cylinder cooling fins can collect debris and cause the engine

to overheat. This unwanted material cannot be removed without partial disassembly of

the engine. Have a Briggs & Stratton Authorized Service Dealer inspect and clean the

air cooling system as recommended in the 

Maintenance Schedule

.

Storage

Fuel System

Refer to Figure:  27.

WARNING 

Fuel and its vapors are flammable and explosive. Fire or explosion could result in

burns or death.

Fuel Storage

•

Because pilot lights or other ignition sources can cause explosions, keep fuel or

equipment away from furnaces, stoves, water heaters or other appliances that

have pilot lights.

Keep the engine level (normal operating position). Fill the fuel tank (A, Figure 27) with

fuel. For fuel expansion, do not fill above the fuel tank neck (B).
Fuel can become stale when kept in a storage container for more than 30 days. The use

of an alcohol-free fuel stabilizer and ethanol treatment in the fuel storage container is

recommended to prevent fuel degradation and keep the fuel fresh.
When you fill the fuel container with fuel, add an alcohol-free fuel stabilizer as specified

by the manufacturer’s instructions. If gasoline in the engine has not been treated with a

fuel stabilizer, it must be drained into an approved container. Operate the engine until it

is out of fuel.

Engine Oil

While the engine is still warm, change the engine oil. Refer to 

Change the Engine Oil

section.

Troubleshooting

Assistance

For assistance, contact your local dealer or go to 

BRIGGSandSTRATTON.COM 

 or call 

1-800-444-7774 

 (in USA).

Specifications

Specifications and Service Parts

Model: 25V000

Displacement

24.898 ci ( 408 cc)

Bore

3.465 in (88 mm)

Stroke

2.638 in (67 mm)

Cable Mounting Bracket Bolt

30 lb-in (3,4 Nm)

Wire Retainer Screw

25 lb-in (2,8 Nm)

Oil Capacity

28-32 oz (,82 - ,95 L)

Spark Plug Gap

.030 in (,76 mm)

Model: 25V000

Spark Plug Torque

170 lb-in (170 Nm)

Armature Air Gap

.010 - .014 in (,25 - ,35 mm)

Intake Valve Clearance

.004 - .006 in (,10 - ,15 mm)

Exhaust Valve Clearance

.006 - .008 in (,15 - ,20 mm)

Engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea level

and 1% for each 10°F (5.6°C) above 77°F (25°C). The engine will operate satisfactorily

at an angle up to 30°. Refer to the equipment operator's manual for safe allowable

operating limits on slopes.

Service Parts - Model: 25V000

Service Part

Part Number

Cable Mounting Bracket

84004150

Paper Air Filter

84002310

Resistor Spark Plug

597383

Spark Plug Wrench

19576S, 5402

Spark Tester

84003327

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

and servicing of the engine and engine parts.

Power Ratings

The gross power rating for individual gasoline engine models is labeled in accordance

with SAE (Society of Automotive Engineers) code J1940 Small Engine Power & Torque

Rating Procedure, and is rated in accordance with SAE J1995. Torque values are

derived at 2600 RPM for those engines with “rpm” called out on the label and 3060 RPM

for all others; 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 gasoline

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 engine. 

Warranty

Briggs & Stratton

®

 Engine Warranty

Effective August 2021

Limited Warranty

Briggs & Stratton warrants that, during the warranty period specified below, it will

repair or replace, free of charge, with a new, reconditioned or re-manufactured part,

at the sole discretion of Briggs & Stratton, any part that is defective in material or

workmanship or both. Transportation charges on product submitted for repair or

replacement under this warranty must be borne by purchaser. This warranty is effective

for and is subject to the time periods and conditions stated below. For warranty

service, find the nearest Authorized Service Dealer in our dealer locator map at

BRIGGSandSTRATTON.COM. The purchaser must contact the Authorized Service

Dealer, and then make the product available to the Authorized Service Dealer for

inspection and testing.

There is no other express warranty. Implied warranties, including those of

merchantability and fitness for a particular purpose, are limited to one year

from purchase, or to the extent permitted by law. All other implied warranties

are excluded. Liability for incidental or consequential damages are excluded

to the extent exclusion is permitted by law.

 Some states or countries do not allow

limitations on how long an implied warranty lasts, and some states or countries do not

allow the exclusion or limitation of incidental or consequential damages, so the above

limitation and exclusion may not apply to you. This warranty gives you specific legal

rights and you may also have other rights which vary from state to state and country to

country

*

.

Standard Warranty Terms 

1, 2, 3

Vanguard

®

; Commercial Series 

 3

Consumer Use - 36 months
Commercial Use - 36 months

XR Series

Consumer Use - 24 months
Commercial Use - 24 months

All Other Engines Featuring Dura-Bore™ Cast Iron Sleeve

12

Not for 

Reproduction