Medium
1-2 hours
This is an authentic Briggs & Stratton replacement part sourced from the original manufacturer for use with small engines. The flywheel is engaged by the starter motor when starting the engine. The flywheel contains magnets on the side that cause the ignition module to send an electric charge to the spark plug. The fan blades on the flywheel are used to cool the engine during use. This flywheel is a complete part assembly including the ring gear. This flywheel is available as an individual replacement part.
Flywheel 691987
OEM part for: Briggs & Stratton Engines, Toro
Part Number: 691987
$140.07
In Stock
Order within the next 13 hours and your part ships today! 
Jump To:
Frequently Purchased Together ?
Compatibility
This Flywheel will fit the following 9566 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 9566 matching models.
9566 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Briggs & Stratton Engines
- Lawn Boy
- Toro
This item works with the following types of products:
- Engine
- Generator
- Lawn Mower
This part replaces obsolete part #: 692315, 492175, 492177
Customer Part Reviews ?
Average Rating (out of 5):
Click to filter by ratings:
5 stars
1
4 stars
0
3 stars
0
2 stars
0
1 stars
0
< PREV
- 1
Worked as expected.
The right part, and in a timely manner. It was easy to install, and the engine runs great, now. The only drawback was the USPS delivery- they kept me waiting an extra three days from their original delivery date.
Guest -
October 9, 2023
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Flywheel
No questions have been asked yet
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Flywheel cracked and sheared flywheel key
Tim - June 7, 2018
👍 2 of 3 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Hard
Time
1-2 hours
Tools Used
Pliers, Power Drill, Socket set, Adjustable Wrench
Parts Used
Initial problem was a Briggs and Stratton 5HP lawn mower motor not turning over to start:
1. Initial idea was to take apart and clean carburetor which did not change status.
2. Removed engine covers and casing.
3. Removed Flywheel cup by gripping with a wrench just above blade under lawnmower and loosening bolt on top with socket (had to to go purchase 15/16th inch socket as this was just above the biggest in my set).
4. After visual inspection determined a crack was in flywheel.
5. Ordered parts (don't forget to order flywheel key and flywheel puller as these do not come with it).
6. Used flywheel puller to remove flywheel.
7. Placed new flywheel on mower and inserted flywheel key.
8. Replaced flywheel cup and engine covers.
My repair was a bit more extensive as I also removed valve and piston covers to clean engine build up as the valve was sticking due to this build up and I also sharpened the blade.
Engine runs like new now.
1. Initial idea was to take apart and clean carburetor which did not change status.
2. Removed engine covers and casing.
3. Removed Flywheel cup by gripping with a wrench just above blade under lawnmower and loosening bolt on top with socket (had to to go purchase 15/16th inch socket as this was just above the biggest in my set).
4. After visual inspection determined a crack was in flywheel.
5. Ordered parts (don't forget to order flywheel key and flywheel puller as these do not come with it).
6. Used flywheel puller to remove flywheel.
7. Placed new flywheel on mower and inserted flywheel key.
8. Replaced flywheel cup and engine covers.
My repair was a bit more extensive as I also removed valve and piston covers to clean engine build up as the valve was sticking due to this build up and I also sharpened the blade.
Engine runs like new now.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
split fly wheel,
Earl - September 28, 2017
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Wrench Set, Nutdriver
Parts Used
Remove cowl and gas tank. Remove the split fly wheel and key replace old flywheel and key with new. Install gas tank and cowl. Easy peasy. lol
Did you find this story helpful?
Thanks for voting and helping fellow customers!
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Learn MoreOur product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
