This is an original part from Briggs & Stratton. The rocket cover gasket is compatible with many small engines. The cardboard composite gasket is designed to prevent damage to engine parts and absorb fuel leakage. A screwdriver and a wrench may be needed to make the removal and replacement. This part is sold individually. It is recommended to refer to engine manual and diagrams for further instruction.
Gasket-rocker Cover 806039S
OEM part for: Briggs and Stratton
Part Number: 806039S
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![Briggs and Stratton Briggs and Stratton](images/16758_white.png)
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Compatibility
This Gasket-rocker Cover will fit the following 8366 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs and Stratton
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
This part replaces obsolete part #: 806039, 805028
Customer Part Reviews ?
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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.
Bent push rod
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set
Parts Used
Gasket replaced
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Oil leak at valve cover.
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Cleaned it carefully
Secured the new gasket to the valve cover with a dab of gasket adhesive.
Tighten nuts. Do not over tighten.
No leaks.
Backfiring out of muffler, loss of power, misfires
Tool Type
Engine
Difficulty
Medium
Time
1-2 hours
Tools Used
Socket set, Wrench Set, feeler gauge, torque wrench, compressed air
2. Then checked valve adjustment, tested compression but then found out this engine has compression release in the valve train so I did a cylinder leak down test which showed good valves and cylinders.(A leak down test uses a special gauge that uses a compressed air source of about 90 -100 pounds pressure and meters a specific flow into the cylinder from the spark plug hole while the cylinder is at top dead center and both valves are closed. A gauge then indicates how much air is leaking out of the cylinder. If the gauge indicates your engine has significant leakage you listen to the 3 different areas of the engine to determine where the leakage is occurring. (Crank case at the PCV valve or oil cap which would indicate bad piston rings, Carburetor throat which would indicate bad intake valve, or the muffler exhaust which would indicate a bad exhaust valve) NOTE: Even with a normal indication on the gauge there will always be some air passing the piston rings.
3. Next I removed the Carburetor which was relatively easy.
4. Cleaned carb, blew it out with compressed air.
5. Reassembled carb and installed on engine.
6. Changed oil, plugs, and air filter.
Valve cover gaskets were leaking oil.
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Scraper, grease remover
Parts Used
I had a blown head gasket
Tool Type
Engine
Difficulty
Medium
Time
More than 2 hours
Tools Used
Socket set, Wrench Set, Torque wrench
Bent exhaust push rod.
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set
Parts Used
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Our 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.