Medium
30-60 minutes
This replacement gasket-cylinder head is sourced from original equipment manufacturer. It is specially designed for use on Briggs and Stratton engines commonly installed on Toro lawn and garden equipment. Its purpose is to provide an air tight seal for the cylinder head. Over time this gasket will get compressed and deteriorate requiring replacement. This item is made from durable composite material and it is sold individually. To complete this repair you will need a set of wrenches.
Gasket-cylinder Head 271866S
OEM part for: Briggs & Stratton, Briggs & Stratton Engines, Toro
Part Number: 271866S
$10.94
In Stock
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Compatibility
This Gasket-cylinder Head will fit the following 5286 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 5286 matching models.
5286 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
- Murray
- Toro
This item works with the following types of products:
- Engine
- Generator
- Lawn Mower
- Lawn Tractor
- Snowblower
This part replaces obsolete part #: 271866 (Included in Valve Overhaul Gasket Set-Part No. 498539. Included ), 271866, 271075
Customer Part Reviews ?
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Perfect match
I have ordered parts for my mısc. small engines several times, never had a single problem with the parts or on time delivery. Great customer service to top that.
Guest -
June 23, 2020
Verified Purchase
no problems
every things good
Guest -
February 25, 2020
Verified Purchase
Head gasket /carb repair
Parts were fine ....Just your shipping 3 ounce package really sucked ..head gasket was bent over so much I thought it was cracked and shipping time also was ridiculously slow
Guest -
October 16, 2019
Verified Purchase
Head gasket
Awsome!!!!!!......thanks guys
Guest -
June 25, 2019
Verified Purchase
Fit and quality fine.
Worked perfectly, but shipping has recently been slow. Perhaps due to supply chain problems.
C -
November 8, 2021
Verified Purchase
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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.
The engine seized
Dennis - June 24, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver, Impact wrench.
I disassembled the engine. I discovered that the rod had seized to the crank, but I had shut it down before the rod broke. I soaked the aluminum off from the crank using oven cleaner and then polished the crank in a lathe. I marked all the parts and found the engine to be in spec, so I installed the rings, slid the piston home, torqued the rod to spec and turned the engine over to check for binding. It was fine, so I torqued the rest of the crankcase and head to spec. After reinstalling the engine to the tractor I added oil and fuel and it fired it up. I let it run for a couple minutes keeping an eye on things. It seemed fine so I took it out mowing. I like to break an engine in under load with out abusing it, so I put it under a varying load at various throttle settings. After about an hour of this, it had quit smoking and was running nicely.
One additional thing I did that doesn't pertain to the original problem is bring the valves to spec. On this engine, the stems have to be ground a bit at a time. I also tapped the valves to the seats. I consider the project a success. The parts come with any unusual techniques or specs needed to do this.
One additional thing I did that doesn't pertain to the original problem is bring the valves to spec. On this engine, the stems have to be ground a bit at a time. I also tapped the valves to the seats. I consider the project a success. The parts come with any unusual techniques or specs needed to do this.
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Would not start
Ronald - May 31, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
Parts Used
Pulled head, put in new head gasket
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Blown head gasket
DAVID - May 31, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
The very first thing, even before ordering the new head gasket, was to watch a couple of You Tube videos to see what was involved since I had never replaced a head gasket before.
The most time spent on the repair was spent on removing the mower hood, exhaust, fuel input, etc. in order to be able to get to the head.
After that the actual removal of the head, replacement of the gasket, and re-attachment of the head was simple.
My riding mower has Briggs & Stratton's OHV (overhead valves) and that is a pain to get the adjustment correct--that took about 30 minutes and is not included in my estimated time to replace the head gasket. The valve adjustment is a separate repair problem and needs to be done every year or two. I have found NO benefit to the OHV design--I have another riding mower with a Briggs engine and is over 10 years old and have never had a problem with it.
Final step was re-installation of all the various mower body parts.
The most time spent on the repair was spent on removing the mower hood, exhaust, fuel input, etc. in order to be able to get to the head.
After that the actual removal of the head, replacement of the gasket, and re-attachment of the head was simple.
My riding mower has Briggs & Stratton's OHV (overhead valves) and that is a pain to get the adjustment correct--that took about 30 minutes and is not included in my estimated time to replace the head gasket. The valve adjustment is a separate repair problem and needs to be done every year or two. I have found NO benefit to the OHV design--I have another riding mower with a Briggs engine and is over 10 years old and have never had a problem with it.
Final step was re-installation of all the various mower body parts.
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Needed valve adjustment
Allen - October 23, 2021
Tool Type
Lawn Tractor
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Wrench Set, Scraper, wire brush
Parts Used
Removed head from motor
Removed carburetor
Removed intake valve and adjusted valve clearance.
Replaced valve, carburetor, and reinstalled head with new gasket.
Mower runs great
Removed carburetor
Removed intake valve and adjusted valve clearance.
Replaced valve, carburetor, and reinstalled head with new gasket.
Mower runs great
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Mouse infestation, corrosion, displaced valve seat, no spark, frozen crank, you name it, in mower engine
C - October 19, 2021
Tool Type
Lawn Tractor
Difficulty
Hard
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Socket set, Wrench Set, Oxy-acetylene torch
Parts Used
1. Removed covers, shrouds, housings
2. Cleaned off mouse nest, wire brushed corrosion
3. Removed head bolts (broke two) to remove head.
4. Found displaced intake valve seat. Removed valves.
5. Re-set valve seat, ground valves.
6. Cleaned out combustion chamber
7. Drilled and tapped two head bolt holes
8. Re-installed head with new spark plug.
9. Remove, clean and re-install carb
10. Re-assemble, add fresh gas and run!
2. Cleaned off mouse nest, wire brushed corrosion
3. Removed head bolts (broke two) to remove head.
4. Found displaced intake valve seat. Removed valves.
5. Re-set valve seat, ground valves.
6. Cleaned out combustion chamber
7. Drilled and tapped two head bolt holes
8. Re-installed head with new spark plug.
9. Remove, clean and re-install carb
10. Re-assemble, add fresh gas and run!
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Installed New head gasket and starter
Bob - April 25, 2021
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set, Nutdriver
Parts Used
Replaced
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Compression spring was broken off the can-shaft
Scott - April 3, 2021
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Power Drill, Socket set, Wrench Set
Drain the oil, remove motor from the frame, turned upside down to remove crankcase cover, pulled old cam-shaft out, found broken compression spring unattached, put in new parts, gaskets, seals, then adjusted compression valves to 0.004 change oil filter and put fresh oil in. The part fit perfectly! Thank you for helping me with my problems.
Thank you!
Thank you!
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Head Gasket Blew
Patrick - February 6, 2021
Tool Type
Lawn Tractor
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set, Wrench Set, Scrapper and Carb Cleaner
Received two lawn tractors, an old Western Auto, Wizard, with a 12.5HP Briggs and Stratton, blowing smoke and running like crap. And a Bolens MTD with a 13.5HP Brigs and Stratton, also blowing smoke and running bad. Replaced head gaskets, on both mowers, and the problems stopped. Additionally, we seem to pick up a little extra power.
Blown head gasket caused me to have to replace the plug, so I decided to do a general tune up on them both, to include plus, air filter, and oil change.
Thanks for having the parts available.
Blown head gasket caused me to have to replace the plug, so I decided to do a general tune up on them both, to include plus, air filter, and oil change.
Thanks for having the parts available.
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would not start
Bill - May 28, 2020
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
Removed the head repalace the head gasket
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Tractor ran rich and extremely hard to start
Wade - August 13, 2017
Tool Type
Lawn Tractor
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Socket set, Wrench Set, Adjustable Wrench
I thought the float valve was not working, even after a complete carb rebuild. Pulled the head to check for burnt or stuck valves, significant carbon build up, but valves still closed correctly. Had weak spark, but it was there, so I replaced the coil, it did not run at all after that, so I pulled the kill wire from the magneto, the machine started, the carburetor adjustments were effective, better than before. Found a safety module that checks seat interlock, gear interlock, and deck engagement before you are allowed to start the machine. This module 68-2940 part number on a Toro 55600 series tractor kills the engine by grounding the ignition magneto coil.
So, I replaced the head gasket after cleaning the head and valves, put a float valve in the carb, by the way the little green ring goes in with a raised lip on the bowl side of the valve, replaced the coil and will install a new ignition switch and module coil when it comes in.
So, I replaced the head gasket after cleaning the head and valves, put a float valve in the carb, by the way the little green ring goes in with a raised lip on the bowl side of the valve, replaced the coil and will install a new ignition switch and module coil when it comes in.
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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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