Easy
30-60 minutes
Genuine Manufacturer Approved replacement part, fits 3-5 gross HP Horizontal crankshaft engines (Pulsa-Jet Carburetors). This part is sold individually. Diaphragms are an essential part of an engine because they provide an air tight seal where it is needed to ensure proper operation of an engine at it maximum potential.
Diaphragm-carburetor 272538S
OEM part for: Briggs & Stratton, Briggs & Stratton Engines, Toro
Part Number: 272538S
$4.99
In Stock
Ships within 1 business day 
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Compatibility
This Diaphragm-carburetor will fit the following 3203 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 3203 matching models.
3203 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Briggs & Stratton Engines
- Craftsman
- Toro
This item works with the following types of products:
- Blower
- Engine
- Generator
- Vacuum
This part replaces obsolete part #: 272538
Customer Part Reviews ?
Average Rating (out of 5):
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Fast service perfect fit
Fast service and it was a perfect match
mark -
April 17, 2024
Verified Purchase
Perfect fit
Perfect fit, quick shipping, excellent packaging, great price
Ron -
March 28, 2023
Verified Purchase
The Right Part!
Just what I needed to repair the edger, which was found in trash. Easy to order and arrived quickly.
Anonymous -
May 20, 2022
Verified Purchase
East to order & correct part sent
Replaced part and tiller running great
Guest -
March 30, 2021
Verified Purchase
Part order
Very happy to find the part I needed
to repair my Yard Master tiller . Your website was very helpful . Thanks
Guest -
May 13, 2020
Verified Purchase
workls lioke a charm
great
Guest -
April 6, 2020
Verified Purchase
very easy repair.just remove 4 screws take out old replace with new
every thing came thru in great shape fact I got it two days quicker than was told
Guest -
March 18, 2020
Verified Purchase
Lawnmower part
Thank you for getting it right out to me
Guest -
November 6, 2019
Verified Purchase
Perfect replacement part
Good quality diaphragm, worked out great
Guest -
September 14, 2019
Verified Purchase
correct part
quick delivery , Thanks very much .
jerry -
August 22, 2019
Verified Purchase
Questions & Answers ?
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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 wouldn't turn over and water damage was evident.
Garren - April 5, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Engine
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver, Hanger wire.
I removed the lever panel, gas tank, and carborater in that order. I cut a new gasket for the carb to rest on, flushed the carb with cleaner, flushed the gas tank with fresh gas, replaced the diaphram, and reassembled. Finally adding the air filter and replacing the cap. She cranked up after ten pulls. The grommets had weathered and needed replacing. Other than that, it was pretty straight forward.
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The carburetor diaphragm was old and no longer worked.
Ron - September 24, 2020
👍 1 of 1 people found this instruction helpful
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Remove the four screws that hold the diaphragm cover plate to the carburetor.
Remove the cover plate. Notice the orientation of the diaphragm and remove it. At this point spray some carb cleaner through the orifices to remove any debris.
Place the new diaphragm on the carburetor (there is only one way the diaphragm will fit) and attach the cover plate to the carburetor with the four screws.
Remove the cover plate. Notice the orientation of the diaphragm and remove it. At this point spray some carb cleaner through the orifices to remove any debris.
Place the new diaphragm on the carburetor (there is only one way the diaphragm will fit) and attach the cover plate to the carburetor with the four screws.
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enigine wouldn't run properly. seemed to be running out of gas
ALAN - December 3, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Engine
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set
Parts Used
1. removed the air filter assembly
2. removed the muffler heat shield.
3. removed the diaphram cover plate
4. replaced and reinstalled.
2. removed the muffler heat shield.
3. removed the diaphram cover plate
4. replaced and reinstalled.
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Rebuilt carb and replaced fuel tank
Steve - December 17, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Engine
Difficulty
Easy
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Wrench Set, Adjustable Wrench
Removed tank with carb, used youtube for help
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Would not start. Could not pull gas up from tank
Glen - August 4, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
Removed carburetor from engine and fuel tank.
Removed old gaskets and cleaned up carburetor.
Reassembled unit using new gaskets, diaphragm and started engine.
After warm up adjusted air mixture screw.
Removed old gaskets and cleaned up carburetor.
Reassembled unit using new gaskets, diaphragm and started engine.
After warm up adjusted air mixture screw.
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Chipper was left with ethanol fuel and rotted the bottom of the fuel tank out and left the carb full of yellow “sand”. The rewind spring was broken, the engine would not turn over, as it turned ou
Steve - July 10, 2020
Tool Type
Engine
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Power Drill, Socket set, Wrench Set, Scaler, welder, die grinder with a cutoff wheel, hammer
Removed the fuel tank and carb cleaned the carb and installed the rebuild kit. I cut the damaged metal out of the fuel tank, cleaned the rust out of the rest of the tank with a needle scaler and welded a new bottom onto the tank. Next I pulled the blower housing off and replaced the rewind spring. After that I pulled the housing off the chipper, took the flails apart and freed them up, cleaned the mouse nest out, gave everything a coat of paint.
Now I have a good chipper that starts on the second pull that I saved from going to the dump for very little money.
Now I have a good chipper that starts on the second pull that I saved from going to the dump for very little money.
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carburetor set for long time gas turned to varnish
Michael - June 6, 2020
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Disable clean all parts reassemble with new gaskets add gas start and adjust .
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Fuel was left in the tank.
Ezra - June 3, 2020
Tool Type
Engine
Difficulty
Medium
Time
More than 2 hours
Tools Used
Wrench Set, Nutdriver, Torque bit\\\'s
Coil was bad so fuel was left in the tank gumming up carb. Replaced coil removed carb/fuel tank, cleaned tank and rebuilt carb reinstall tank and carb.
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Engine would run under a load.
Gregory - November 27, 2019
Tool Type
Engine
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver, Air Compressor, Scraper, Carb Cleaner
1. Removed Gas tank and carburetor.
2. Dissembled carb, cleaned gas tank, replaced carb diaphragm.
3. Reassemble.
4. Replaced pull rope.
the site had parts necessary and shipped them promptly, great company to work with.
Recommend them highly.
2. Dissembled carb, cleaned gas tank, replaced carb diaphragm.
3. Reassemble.
4. Replaced pull rope.
the site had parts necessary and shipped them promptly, great company to work with.
Recommend them highly.
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Tiller not runing
Richard - October 10, 2019
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set
Replaced parts as listed. Runs great.
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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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