Skip to Content
  • 2 Day Quick Delivery! 2 Day Quick Delivery!
  • 365 Day Return Policy! 365 Day Return Policy!
  • 15 million satisfied customers 15 million satisfied customers
  • Over 2.1 Million Parts In Stock Over 2.1 Million Parts In Stock
  • Repair ForumFree Tech Support!
  • Google Trusted Store Google Trusted Store

121Hsv3 Parts

Some parts shown may not be for your model. To see parts for your model only, select it from "Matching Model Numbers" list on the left.

More
Engine Piston Pin Lock
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691588

Fix engine knocking or loss of power with this piston pin lock. Secures the piston pin in small engines. Essential for proper piston assembly.

More
$7.95
Compare At:
$8.76
You Save:
$0.81

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Pin-Shaft
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691623

 

More
$2.29
Compare At:
$2.52
You Save:
$0.23

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Engine Mounting Screw
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691636

Mounting screw for lawn and garden engines. Secures engine components and covers. Replace if stripped, corroded, missing, or damaged during maintenance.

More
$7.43
Compare At:
$8.27
You Save:
$0.84

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Screw
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691648

 

More
$7.95
Compare At:
$8.86
You Save:
$0.91

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Plug-Oil Drain
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691680

 

More
$8.53
Compare At:
$9.51
You Save:
$0.98

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Lock-Muffler Screw
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691740

 

More
$2.50
Compare At:
$2.75
You Save:
$0.25

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Cover-Control
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691757

 

More
$12.73
Compare At:
$14.01
You Save:
$1.27

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Gear-Drive
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691772

 

More
$50.14
Compare At:
$55.15
You Save:
$5.01

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Governor Link
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691829

This genuine Briggs & Stratton governor link can be used as a replacement part for appliances operated by small engines, including lawn tractors, lawnmowers, snowblowers, leaf blowers, vacuums, tillers, and generators. The function of a governor link on a small engine appliance is to set the throttle to run at a steady speed. A governor link might have to be replaced if it withstands enough damage to prevent the governor link from keeping the throttle running and keeping the rest of the engine's governor assembly in place. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This governor link is compatible with the following brands: Midwest Engine, Briggs & Stratton, Toro, Cub Cadet, and Simplicity. This part is sold individually.

More
$2.86
Compare At:
$3.14
You Save:
$0.28

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Gear-Timing
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691830

 

More
$16.67
Compare At:
$18.78
You Save:
$2.11

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Spring-Brake
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691831

 

More
$10.58
Compare At:
$11.74
You Save:
$1.16

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Engine Piston Pin Lock
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691866

Fix engine knocking or power loss with this piston pin lock. Secures the piston pin in small engines. Basic mechanical skills needed for installation.

More
$4.95

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Gasket-Brea Passage
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691879

 

More
$3.31
Compare At:
$3.64
You Save:
$0.33

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Exhaust Gasket
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691881

This exhaust gasket is a genuine Midwest Engine replacement part for appliances operated by small engines, such as chipper shredders, snowblowers, leaf blowers, and lawn mowers. An exhaust gasket's purpose in the engine is to create a sealed layer between the carburetor and the exhaust tube to keep dirt and debris out of the infrastructure of the engine. A malfunctioning or broken exhaust gasket could compromise the seal between the carburetor and the exhaust tube, meaning that dirt and debris could get into the engine and cause damage. An exhaust gasket could be subject to damage from overuse and is generally known to require replacement over time from general wear and tear. If the exhaust gasket seal is compromised, it should be replaced immediately. Evidence of dirt and debris compromising an engine could take the form of oil leaking from the carburetor, black smoke pluming from the exhaust tube, and lower engine pressure than usual. This exhaust gasket is compatible with the following brands: Briggs and Stratton, Cub Cadet, and Toro. This part sold individually.

More
$5.09
Compare At:
$5.60
You Save:
$0.51

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Breather Tube
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691923

The breather tube is responsible for filtering out exhaust gases from the crankcase. It has special fibers in the tube to remove contaminants as it moves the exhaust gases through the ventilation valve and out into the air. The tube also helps ensure that the engine air stays cool for optimal performance. This rubber tube can become dry and cracked over time, or it could be damaged due to an incident or impact. In any case, the tube should be fully replaced when it is not functional to ensure optimal performance at all times. This genuine OEM breather tube is manufactured to exact standards and made by Briggs and Stratton. It is compatible with select engines on more than 150 lawn mowers and generators from Toro, Briggs & Stratton, and Lawn Boy. This replacement tube is made of high-quality materials and sold as an individual part. No hardware or other parts are included with the purchase. This part should only be replaced once the engine is cool and all work should be done in a well-ventilated area. A screwdriver and socket set will be required to replace this part.

More
$3.25
Compare At:
$3.58
You Save:
$0.33

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
Oil Seal
Genuine Midwest Engine part
By: Midwest Engine
Part Number: 691952

 

More
$5.26
Compare At:
$5.78
You Save:
$0.52

Out Of Stock

Usually ships within 4 - 14 days

Add to Cart
  • Over 2.1 Million Parts In Stock Over 2.1 Million Parts In Stock
  • 2 Day Quick Delivery! 2 Day Quick Delivery!
  • 365 Day Return Policy! 365 Day Return Policy!
  • Repair ForumFree Tech Support!
  • Google Trusted Store Google Trusted Store