Easy
30-60 minutes
This rocker arm adjuster, or valve lash adjuster, is a genuine OEM replacement part used in lawn tractors. It is approximately one inch long and made of steel. It is responsible for adjusting the clearance between the rocker arm and valve stem, which allows the valves to open and close as needed. The adjuster will need to be replaced if the threads are stripped, or if it is cracked, or worn down. Remove the spark plug wire to prevent accidental starting and remove the valve cover from the engine to access the rocker arm. Detach the rocker arm and unthread the faulty adjuster. Screw the new adjuster into the rocker arm and use a feeler gauge to set the correct intake clearance. Reinstall the arm into the engine and return the valve cover to complete the repair.
Adjuster-rocker Arm 691986
OEM part for: Briggs & Stratton Engines, Toro
Part Number: 691986
Ships within 1 business day 
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Compatibility
This Adjuster-rocker Arm will fit the following 3344 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 3344 matching models.
3344 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
- Lawn Mower
- Lawn Tractor
This part replaces obsolete part #: 810104, 492160, 810068
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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.
Intake push rod broke, because set screw backed off, and push rod guide broke as well.
Tool Type
Lawn Tractor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set, Allen wrench, feeler gauge set,spark plug socket.
2. Put piston at top dead center, on the stroke where cam was not lifting push rods.
3. Reassembled push rod guides and rocker arms and set intake clearance to .005 thousands and exhaust to .007 thousands.
4. rotated engine by hand a couple of times to make sure clearances stayed adjusted.
5.Put spark plug back in.
6. Put new valve cover gasket on and tightened bolts on valve cover.
7. Started motor and checked for leaks and listened for noise from rocker arm assembly, very quiet running and put back to work.
Rocker arm came off
Tool Type
Lawn Tractor
Difficulty
Medium
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Broken push rods and other worn out items.
Tool Type
Lawn Tractor
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set, Nutdriver, torque wrench and Allen wrenches
Engine did not start
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
briggs and stratton 16 hp ohv verticle shaft tractor engine. stopped running and wouldn,t start.
Tool Type
Lawn Tractor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, 10mm socket 10mm wrench t15 torx screw driver
Parts Used
2/ remove broke exhaust valve rocker arm adjuster.
3/install new rocker arm adjuster .
4/ gap rocker arm adjuster .010 ths of an inch .
5/ replace valve cover ,
6/ your good to go.
ADJUSTER WAS STRIPPED.
Tool Type
Lawn Tractor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set
Needed to adjust valve with new rocker adjustment
Tool Type
Lawn Tractor
Difficulty
Medium
Time
15-30 minutes
Tools Used
Nutdriver, Adjustable Wrench
Valve adjuster broke
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Wrench Set
Valve adjust
Tool Type
Lawn Tractor
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Wrench Set, Gauge
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.
