Easy
15-30 minutes
The diaphragm attaches to the screw shoulder and is made of plastic and metal. This part is available as an individual replacement. This genuine item is supplied by the original equipment manufacturer for use with Kohler engines and Husqvarna lawn mowers. During replacement, it may require a set of pliers, a socket set, a wrench set, and a torx driver to help install this part correctly. It will require replacing if it breaks.
Diaphragm: Assembly 14 268 04-S
OEM part for: Kohler
Part Number: 14 268 04-S
$21.29
In Stock
Ships within 1 business day 
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Compatibility
This Diaphragm: Assembly will fit the following 175 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Kohler
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
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Easy repair, great part, worked as expected!
My mower has been bogging down all year, despite changing air filter, spark plug and adding fuel treatment. Upon inspection of the carburetor, I noticed the hose for the diaphragm had deteriorated and was cracked in multiple places. Order this part along with a new carb and choke bar and we replaced them all. Started right up! Fingers crossed it keeps working!
Anonymous -
October 17, 2022
Verified Purchase
Easy repair. The choke diaphragm worked as expected
The part came in fast. My lawnmower works great!
victor -
October 11, 2022
Verified Purchase
Perfect Fit
Part was exactly as stated, thanks
Perry -
August 2, 2019
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.
Engine ran fine with starter fluid but would not start, hot or cold, even after carb cleaning
Jeffrey - July 9, 2017
👍 6 of 6 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Socket set, Wrench Set, Torx driver
Convinced the carb was still the issue despite cleaning attempts, and since I was replacing the carb, to bring the mover back to practically new specks (It was 4 years old), I replaced the carb, choke, and diaphragm. Fuel frequently evaporates around the gas cap, so I am also replacing the gas cap since ethanol fuel is such a problem nowadays
1. Removed the starter (71"Lbs)
2. Removed the engine housing
3. Clamped and disconnected the fuel line (Small amount of gas drained)
4. Removed the air filter housing and air filter
5. Removed the three carb retaining nuts (71"Lbs)
6. Unplugged the spark plug
7. Removed the auto choke retaining nuts (No torque specs, just moderately tight)
8. Removed the choke torx screws (2)
9. Removed the diaphragm torx screws (2)
10. Removed the vacuum lines going to the carb/air cleaner housing
11. Completely removed the air cleaner housing
12. Completely removed the choke assembly
13. Completely removed the diaphragm assembly
14. Removed all linkages, used a small pair of needle nose on the throttle spring
15. Removed the old carb and gaskets
16. Pulled the old gas cap out of the tank (The fingers are plastic and will bend with a small amount of force)
17. Swapping old parts with new parts, assemble by reversing disassembly steps. Ensure you put in the two new carb gaskets and torque everything as documented by Kohler
By about halfway through a starter pull, the engine was running. It had not started that fast since it was new, and ran like new once re-assembled. You can probably cut the expense by a third if you just replace the carburetor, but I wanted a like new machine starting over again for at least 4 years. Pay close attention to fuel stabilizers and emptying the tank at year end. These things gum way too quickly with modern fuels. I never did figure out what I missed cleaning the original carb
1. Removed the starter (71"Lbs)
2. Removed the engine housing
3. Clamped and disconnected the fuel line (Small amount of gas drained)
4. Removed the air filter housing and air filter
5. Removed the three carb retaining nuts (71"Lbs)
6. Unplugged the spark plug
7. Removed the auto choke retaining nuts (No torque specs, just moderately tight)
8. Removed the choke torx screws (2)
9. Removed the diaphragm torx screws (2)
10. Removed the vacuum lines going to the carb/air cleaner housing
11. Completely removed the air cleaner housing
12. Completely removed the choke assembly
13. Completely removed the diaphragm assembly
14. Removed all linkages, used a small pair of needle nose on the throttle spring
15. Removed the old carb and gaskets
16. Pulled the old gas cap out of the tank (The fingers are plastic and will bend with a small amount of force)
17. Swapping old parts with new parts, assemble by reversing disassembly steps. Ensure you put in the two new carb gaskets and torque everything as documented by Kohler
By about halfway through a starter pull, the engine was running. It had not started that fast since it was new, and ran like new once re-assembled. You can probably cut the expense by a third if you just replace the carburetor, but I wanted a like new machine starting over again for at least 4 years. Pay close attention to fuel stabilizers and emptying the tank at year end. These things gum way too quickly with modern fuels. I never did figure out what I missed cleaning the original carb
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Diaphragm hose was dry rotted and cracked
John - June 24, 2018
👍 2 of 2 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Socket set
Parts Used
1. Remove air filter and air filter housing 3 10mm nuts.
2. Remove diaphragm and house - use needle nose players for small clamps.
3. Reinstall new primer with new hose and clamps included.
4. Reinstall air filter and air filter housing.
2. Remove diaphragm and house - use needle nose players for small clamps.
3. Reinstall new primer with new hose and clamps included.
4. Reinstall air filter and air filter housing.
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Rough Idle, Stalling, Needed Carb/Choke Cleaner To Smooth Out The Idle And Keep From Stalling
Michael - May 12, 2021
Tool Type
Lawn Mower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Pliers, Socket set, Wrench Set, Torx driver
--Special Note--
This repair was done after the installation of a new carburetor and gaskets failed to solve the rough idle and stalling issue.
1. Remove the top plastic engine cover.
2. Remove the air filter, breather tube and air box.
3. Remove the two Torx drive screws securing the diaghram assembly to the carburetor.
4. Disconnect the metal link attaching the diaghram to the carburetor.
5. Remove the hose clamp and hose attaching the diaghram to the carburetor and completely remove the diaghram assembly.
6. Reattach the new diaghram by reversing steps 3-5.
7. Remove the two nuts attaching the auto choke assembly to the muffler.
8. Remove the two Torx drive screws attaching the auto choke bracket to the carburetor.
9. Remove the metal link attaching the carburetor to the plastic end of the auto choke rod and completely remove the auto choke assembly.
10. Reattach the new auto choke assembly by reversing steps 7-9.
11. Reverse steps 1-2.
This repair was done after the installation of a new carburetor and gaskets failed to solve the rough idle and stalling issue.
1. Remove the top plastic engine cover.
2. Remove the air filter, breather tube and air box.
3. Remove the two Torx drive screws securing the diaghram assembly to the carburetor.
4. Disconnect the metal link attaching the diaghram to the carburetor.
5. Remove the hose clamp and hose attaching the diaghram to the carburetor and completely remove the diaghram assembly.
6. Reattach the new diaghram by reversing steps 3-5.
7. Remove the two nuts attaching the auto choke assembly to the muffler.
8. Remove the two Torx drive screws attaching the auto choke bracket to the carburetor.
9. Remove the metal link attaching the carburetor to the plastic end of the auto choke rod and completely remove the auto choke assembly.
10. Reattach the new auto choke assembly by reversing steps 7-9.
11. Reverse steps 1-2.
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Diaphragm was cracked from age
Perry - August 4, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Nutdriver
Parts Used
Removed The air filter and the carburetor then replaced the diaphragm. Repalced carburetor and air filter. Then mowed the lawn
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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.
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