Easy
30-60 minutes
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
$8.09
In Stock
Ships within 1 business day 
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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
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I received my parts quickly and they worked perfectly just love this company for parts
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January 12, 2023
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easy to find parts
all the parts worked well
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May 17, 2022
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worked great
Parts arrived ahead of schedule and were as advertised.
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April 24, 2020
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Great
Had the parts i needed, they were exactly right and arrived in a timely manner.
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April 30, 2019
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Did The Job
Received the part and had it repaired before the grass had to be mowed again.
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July 15, 2020
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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
RONALD - July 1, 2023
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set
Parts Used
Removed valve cover, replaced push rod, adjusted valves, replaced cover.
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Gasket replaced
alvin - April 15, 2020
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Changed gaskets
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Oil leak at valve cover.
Alfred - March 3, 2019
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Removed 2 nuts on the valve cover.
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.
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.
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Backfiring out of muffler, loss of power, misfires
Jim - April 17, 2017
Tool Type
Engine
Difficulty
Medium
Time
1-2 hours
Tools Used
Socket set, Wrench Set, feeler gauge, torque wrench, compressed air
1. First ran Marvel Mystery Oil through engine to clean up the valve stems if I had sticky valve stems.
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.
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.
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Valve cover gaskets were leaking oil.
Tim - December 15, 2016
👍 1 of 2 people found this instruction helpful
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Scraper, grease remover
Parts Used
Removed and cleaned the rocker covers and head, installed new gaskets and reassembled. Spent some time cleaning the heads where the oil had been leaking to make sure the new gaskets were not leaking.
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I had a blown head gasket
Tim - June 27, 2016
Tool Type
Engine
Difficulty
Medium
Time
More than 2 hours
Tools Used
Socket set, Wrench Set, Torque wrench
Had to remove the side panels of the mower top of mower take head off replace gasket and valve cover, reassemble it runs perfect
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Bent exhaust push rod.
Mel - November 12, 2015
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set
Parts Used
Removed valve cover,cleaned the surface, replaced push rod and gasket.
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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.
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