Briggs & Stratton 120000 User Manual

Briggs & Stratton 120000

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Operator’s Manual

BRIGGSandSTRATTON.com

ECopyright Briggs & Stratton Corporation

Milwaukee, Wisconsin 53201 U.S.A.

Form No. 277040-3/07

Printed in U.S.A.

Model 200000

Power Built 1350/1450 Series

Intek I/C 1350/1450 Series

I/C 1450 Series

Model 120000

Power Built 825/850/875/900 Series

Intek I/C 825/850/875/900 Series

I/C 825/850/875 Series

Model 150000

Power Built 1100/1125 Series

Model 210000

Power Built 1500/1575 Series

Intek I/C 1500/1575 Series

Other manuals for Briggs & Stratton 120000

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Questions and Answers:

G
George WrightAug 17, 2025
What to do if my Briggs & Stratton 120000 will not start?
- J
  Jacob FosterAug 17, 2025
  If your Briggs & Stratton Engine won't start, begin by adding clean, fresh fuel. If the carburetor is flooded, move the choke control lever to the RUN position and follow the starting procedure until the engine starts. Check the oil level, as some engines have an oil pressure switch that activates a warning light or stops the engine if the pressure drops too low. Also, inspect the spark plug; it may need cleaning and the gap adjusted. Finally, ensure the oil level isn't above the FULL mark on the dipstick; if it is, drain the excess oil.
A
Alicia WilliamsAug 20, 2025
How to fix a Briggs & Stratton Engine that will not start?
- G
  George OwenAug 20, 2025
  If your Briggs & Stratton Engine won't start, it might be due to several reasons. First, ensure you have enough fuel by adding clean, fresh fuel. If the carburetor is flooded, move the throttle control lever (if equipped) to the FAST position and follow the starting procedure. Check the oil level and add oil to the FULL mark on the dipstick if it's low. If the oil level is above the FULL mark, drain the excess. Lastly, inspect the spark plug; clean and set the gap, or replace it if it's burned or worn.
K
Kerri PattonAug 22, 2025
Why is my Briggs & Stratton 120000 Engine running erratically?
- S
  Stephen Haynes MDAug 22, 2025
  If your Briggs & Stratton Engine is running erratically, several factors could be responsible. Stale fuel can cause issues, so drain the fuel tank and refill it with fresh fuel. Dirt in the fuel tank can also lead to problems; in this case, drain and clean the tank before adding fresh fuel. A dirty air filter may also be the culprit, so clean or replace it. Lastly, inspect the spark plug; if it's fouled, clean it and set the gap, or replace it if necessary.
T
thomasdorothyAug 26, 2025
What to do if my Briggs & Stratton Engine smokes excessively?
- J
  johnforbesAug 26, 2025
  Excessive smoke from your Briggs & Stratton Engine can stem from a few issues. Check the oil level first; if it's above the FULL mark on the dipstick, drain the excess oil to bring it to the correct level. Also, a dirty air filter can cause smoking, so clean or replace it. Lastly, a fouled spark plug can be the cause, so clean and set the spark plug gap, replacing the plug if it's burned or worn.
S
Sharon CampbellAug 28, 2025
What to do if my Briggs & Stratton Engine is difficult to start or runs erratically?
- C
  Christopher JohnsonAug 28, 2025
  If your Briggs & Stratton Engine is difficult to start, runs erratically, or won't run at full speed, the issue could stem from stale fuel. In this case, drain the fuel tank. Also, check for dirt in the fuel tank; if present, drain and clean the tank before refilling with fresh fuel. A dirty air filter can also cause these problems, so clean or replace it. Finally, inspect the spark plug; clean and set the gap, or replace it if it's burned or worn.
P
Patricia MasonAug 30, 2025
Why is my Briggs & Stratton 120000 smoking excessively?
- H
  Heather BartlettAug 31, 2025
  If your Briggs & Stratton Engine smokes excessively, it may be due to the oil level being above the FULL mark on the dipstick. Drain the excess oil to bring the level to the FULL mark. Another possible cause is a dirty air filter, so clean or replace it. Lastly, a fouled spark plug can cause this issue; clean and set the spark plug gap, or replace the spark plug if it is burned or worn.
X
xtranSep 2, 2025
Why is my Briggs & Stratton 120000 difficult to start?
- R
  Robert HarrisSep 2, 2025
  If your Briggs & Stratton Engine is hard to start or doesn't run smoothly, the fuel may be stale; drain the fuel tank and refill with fresh fuel. There might be dirt in the fuel tank, so drain and clean it before refilling. Clean any debris from the control linkages. Additionally, the spark plug could be fouled; clean and set the spark plug gap, or replace it if the electrode is burned or worn.
L
Levi WatersSep 5, 2025
What to do if Briggs & Stratton 120000 emits excessive smoke?
- K
  Karen WelchSep 5, 2025
  If your Briggs & Stratton Engine is producing excessive smoke, it might be due to the oil level being above the FULL mark on the dipstick; drain the excess oil to bring it to the correct level. Another cause could be a fouled spark plug; clean and set the spark plug gap, referring to the Specifications section, or replace the spark plug if it's burned or worn.
J
Joshua HendricksSep 7, 2025
What to do if a Briggs & Stratton 120000 has excessive vibration?
- J
  Joseph PattersonSep 7, 2025
  If you experience excessive vibration with your Briggs & Stratton Engine, stop the engine immediately and tighten all fasteners. If the vibration continues, take the unit to an Authorized Briggs & Stratton service dealer.

Briggs & Stratton 120000 Specifications

General

Brand	Briggs & Stratton
Model	120000
Category	Engine
Language	English

Summary

Where to Find Us

Safety

Symbols and Warnings

Identifies safety hazards and associated symbols for injury prevention.

Safety Precautions for Adjustments and Testing

Covers safety for adjustments, repairs, and spark testing procedures.

Features

Operation

Oil Management

Details oil capacity, recommendations, checking, and adding oil for engine lubrication.

Fuel Handling and Recommendations

Covers fuel requirements, high altitude use, and safe fueling procedures.

Starting the Engine

Step-by-step guide for safely starting the engine using rewind or electric start.

Stopping the Engine

Instructions on how to properly shut down the engine for different starting types.

Maintenance

Emissions Control and Component Checks

Procedures for emissions control, muffler, spark arrester, carburetor, valve, and spark plug.

Oil and Filter Maintenance

Steps for changing engine oil and replacing the fuel filter.

Air Filter Servicing

Instructions for cleaning and replacing air filter cartridges and pre-cleaners.

Gear Reduction Oil and Fuel Filter

Procedures for changing gear reduction oil and replacing the fuel filter.

Cooling System and Storage

Guide to cleaning the air cooling system and preparing the engine for long-term storage.

Troubleshooting

Specifications

Engine Specifications

Details displacement, bore, and stroke for different engine models.

Tune-up Specifications

Provides spark plug gap, armature air gap, and valve clearance settings.

General Information and Power Ratings

Covers engine type, certifications, and engine power rating details.

Warranties

Emissions Control System Warranty

Details warranty coverage for emissions control parts and owner responsibilities.

Emissions Durability Information

Explains emissions durability periods and air index information found on engine labels.

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