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404437-1209-XX Briggs and Stratton Engine - Overview

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Lawn Mower Spark Plug – Part Number: 796112S
$6.40
In Stock
Lawn Mower Spark Plug
★★★★★
★★★★★
(1)
Part #796112S
This is an OEM replacement part and is sold individually. Its propose is to deliver an electric current from an ignition system to the combustion chamber of a gas fueled engine. It will ignite the air fuel mixture by the spark. Spark Plugs will usually have to gapped to the manufactures specifications found in the owners manual. Over time a Spark Plug will become fouled because the air/fuel ratio may be set wrong,worn piston rings, carbon build up and other factors. It is better to replace a fouled spark plug, rather then trying to clean it.
Engine Oil Seal – Part Number: 391086S
$8.09
In Stock
Engine Oil Seal
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★★★★★
(1)
Part #391086S
The Oil Seal is a manufacturer-approved rubber part which provides a seal between the crankcase and crankshaft by attaching around the axle shaft on the crankhouse housing. Installation is rated as "Medium" difficulty and requires a screw driver, wrench set and seal puller. A broken seal will cause a leak, and the part must be replaced. Refer to your make, model and diagram to ensure you're choosing the right part. This part comes in black and gray.
Key-flywheel – Part Number: 222698S
$6.40
In Stock
Key-flywheel
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★★★★★
(1)
Part #222698S
This is a Genuine OEM replacement part used on a variety of Lawn and Garden equipment. The key helps to secure Flywheel in place. This is a Metal Key and it is Sold Individually. You would need Pliers to replace this item.
Gear-governor – Part Number: 793338
$40.69
On Order
Gear-governor
★★★★★
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(1)
Part #793338
Ensure smooth and balanced operation of your Briggs and Stratton engine with this exceptional Gear Governor. It's intricately designed to maintain control over the speed of the engine, contributing to its performance and efficiency. Crafted by industry-leading brand, Briggs and Stratton, this gear governor guarantees durability and reliability. Experience enhanced functionality and prolonged engine life with this essential element. Designed for consistent fit and easy installation, upgrade your engine's performance with Briggs and Stratton's Gear Governor.
Gear-pinion – Part Number: 695708
$7.88
In Stock
Gear-pinion
Part #695708
This is a manufacturer approved starter pinion gear designed for use with lawn and garden equipment engines. This Starter pinion gear is attach to the starter clutch drive and engages the flywheel to start the engine. It is made out of Plastic and Aluminum and it is Sold Individually.
Hose-vacuum – Part Number: 791766
$10.60
In Stock
Hose-vacuum
Part #791766
This genuine part is sourced directly from the original equipment manufacturer. It is specially designed for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. The purpose of this hose is to transfer vacuum from the engine. Unfortunately, over time the material may wear out and begin to crack eventually requiring a replacement. Make sure to check the diagrams of your model for the exact location and the correct installation of this part. Note, this item includes one durable rubber hose and two metal clamps to secure it.
Engine Dipstick Tube Seal – Part Number: 281370S
$10.97
In Stock
Engine Dipstick Tube Seal
★★★★★
★★★★★
(2)
Part #281370S
This item is a genuine replacement part that has been OEM sourced and is intended to be used with lawnmower engines from Briggs & Stratton and Toro. The rubber seal is used to prevent oil from leaking at the connection between the bottom of the oil fill tube and the crankcase. This item also allows the fill tube to firmly sit into the case. The dipstick tube seal if available as an individual replacement part.
Engine Spark Plug Boot – Part Number: 66538S
$6.40
In Stock
Engine Spark Plug Boot
Part #66538S
This spark plug boot is a genuine OEM Briggs & Stratton replacement designed to fit securely over the spark plug, protecting the connection from moisture, dirt, and debris. Its durable, elbow-style design helps ensure reliable ignition and easy installation, making it an ideal replacement when a cracked, loose, or worn boot causes hard starting, misfires, or inconsistent engine performance.
Engine Breather Gasket – Part Number: 27803S
$6.40
In Stock
Engine Breather Gasket
Part #27803S
This is a high-quality manufacturer-sourced part which is made for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. It helps to distribute the pressure evenly and provide a tight seal for the breather. Over time it may become brittle and begin to crack eventually requiring a replacement. For the proper application please refer to the appropriate diagrams of your model. This high-quality part is made of durable composite material and is sold individually. You will need a screwdriver and a wrench set to remove and reattach the breather.
Alternator – Part Number: 592831
No Longer Available
Alternator
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(1)
Part #592831
Offering durability and high performance, this Briggs and Stratton dual circuit alternator is an essential component for your device. Expertly designed by Briggs and Stratton, this product assures a reliable power supply enhancing the efficiency of your equipment. The dual circuit feature ensures smooth operation of your device during prolonged use. It's an original Travis & Stratton part that ensures longevity and flawless performance of your equipment. Enhance your device's power supply system with this adaptable and high-quality Briggs and Stratton dual circuit alternator. This alternator exemplifies the innovation and reliability associated with all Briggs and Stratton products.
Engine Screw – Part Number: 692198
$8.01
In Stock
Engine Screw
Part #692198
This OEM engine screw is a genuine Briggs & Stratton replacement fastener designed for secure, vibration-resistant attachment of engine components in small gasoline engines and outdoor power equipment. Manufactured to exact factory specifications, it provides proper thread engagement and clamping force to help prevent loosening, reduce vibration, and maintain long-term engine reliability under operating stress. Built with durable, corrosion-resistant materials for extended service life, it is an ideal replacement when original screws are missing, stripped, or worn, helping ensure safe assembly, consistent performance, and proper engine operation.
Filter-pre Cleaner – Part Number: 272490S
$6.73
In Stock
Filter-pre Cleaner
Part #272490S
This is a manufacturer approved replacement part used on a variety of lawn and garden equipment engines. This filter adds a second layer of protection against airborne-dirt particle ingestion. This is a foam pre-cleaner which is sold individually. Please note a paper filter and a cover are both sold separately. No tools are needed to replace this filter. • Remove the filter cover • Take out the old filter and replace it with a new one • Secure the top cover

Common Symptoms of the 404437-1209-XX

How this model fails, and the parts that fix it.

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Bad governor
11 of 22 people found this instruction helpful.
  • John from BROOKVILLE, IN
  • Easy
  • 1- 2 hours
  • Nutdriver, Pliers, Socket set, Wrench set
Look on YouTube for video's on how to replace a Briggs governor. There are several there. My favorite, with best explanation, is, "Easily Replace Briggs Governor Gear (V-Twin Intek Engine) with Taryl". https://www.youtube.com/watch?v=wn3eanGxSEA&t=152s.

Taryl (probably not his real name) does a very good job of showing step-by- step the whole procedure, along with some additional hints/tricks/techniques of value.

Not including oil and filter, I spent less than $50 for a new governor, gasket, and drive shaft seal. That's all that is really necessary to replace is those three parts. That is, unless pieces of the old governor tore up a gear, valve, or something else. Inspect everything! {I was lucky and only the governor was destroyed}

One word of note. Be sure to clean out all of the debris from the blown governor. Be sure to remove the spark plugs and carefully rotate the drive shaft while looking for nooks-and-crannies where debris can hide. I tried to use a magnet to help, but it didn't help much, even though the block is aluminum.

Good luck.
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