This is a Genuine Briggs & Stratton part used on 3-5 HP horizontal Pulsa-Jet Carburetor engines (new style). 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.
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★★★★★
★★★★★
Fit perfect
Roto tiller runs great
Guest - August 10, 2019
Verified Purchase
★★★★★
★★★★★
carb. diaphragm
arrived quickly, fit great running great
Guest - August 21, 2019
Verified Purchase
★★★★★
★★★★★
Excellent Service
Received parts as ordered. Excellent service. I will order again in the future!
Guest - April 23, 2019
Verified Purchase
★★★★★
★★★★★
Worked as expected
Arrived quickly
Guest - April 20, 2019
Verified Purchase
★★★★★
★★★★★
Fit perfectly
Exactly what I needed,OEM part.
Guest - June 15, 2025
Verified Purchase
★★★★★
★★★★★
exact fit
This was the part I needed.
Dean - June 10, 2019
Verified Purchase
★★★★★
★★★★★
Log splitter would not run
This was the first carburetor diaphragm I found on internet. A friend looked and found one cheaper, with more parts and free shipping. This part repaired the carb and I can get the wood split
Guest - November 20, 2019
Verified Purchase
★★★★★
★★★★★
ship cost excessive/ will not buy again
Make your profit on the part... not shipping
Guest - July 24, 2020
Verified Purchase
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I soaked the carb in cleaner, ringed it off and blew out the ports and installed the new parts. The diaphragm was the main culprit but a new spark plug helped too.
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Found my grandfather\'s old plow under a pile of scrap metal while clearing out my dad\'s barn. The 5 hp implement was on its side in the dirt and was last used 40 years or more.
1. Removed starter rope assembly in order to remove dirt.
2. Removed and flushed fuel tank.
3. Cleaned carb and replaced needle valve and diaphragm and spring.
4. Replace spark plug.
5. Reassembled and started. Runs fine!
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Carb was clogged
Jim from San Antonio, Texas
2 of 2 peoplefound this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench set
The time consuming part was separating the fuel tank from the still connected carb. Throttle cable, governor spring and kill switch wiring had to disconnected before tank could be removed. The gasket between the tank and carb was half gone so that problem was obvious. Just to be on the safe side, I also replaced the fuel pump diaphragm wh
... Read moreich required removing the muffler too. This was on a very old Troy Bilt rototiller that had some previous engine mods. Parts supplied were perfect.
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Engine would start but soon quit running, then would not start again.
Stanley from MANHATTAN, Kansas
1 personfound this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench set
1. Removed engine cover.
2. Removed the carburetor/ gas tank unit.
3. Removed carburetor from the gas tank.
4. Removed the diaphragm cover from the carburetor.
5. Removed the diaphragm and return spring unit from the carburetor.
6. Cleaned all surfaces and passage ways.
7. Replaced the diaphragm return
... Read morespring and diaphragm on the carbuetor.
8. Attached the carburetor to the gas tank.
9. Attached the gas tank/carburetor unit to the engine, and hooked up the throttle and governor linkages.
10. Attached the engine cover.
11. Stated the engine and it ran again.
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Rototiller sat for years, caramelized gasoline throughout, muffler rusted out.
Adam from East Peoria, Illinois
1 personfound this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
1- 2 hours
Tools:
Screw drivers, Socket set, Wrench (Adjustable), Wrench set
1. Remove carburetor/tank assembly.
a.disconnect throttle cable.
b.disconnect governor spring
2. Separate carburetor from tank, remove diaphragm and clean all thoroughly.
3. Make sure no old gasket material is remaining and all ports are clear/open.
4. Re-assemble diaphragm, carburetor and tank using
... Read more new parts and gaskets.
5. Re-install carburetor/tank assembly on engine in reverse order as dis-assembly.
Muffler installation:
1. Flatten retaining tabs with a cold chisel or screwdriver and unbolt old muffler.
Note: In my case one of the bolts snapped off in the block so that was another can of worms, I filed the bolt flat as best that I could, center punched it (emphasis on center!) and drilled for an easy-out. Easy-outs didn\'t work, too much outward force so I drilled a little bigger and tapped it out. Use the proper size drill bits and make sure drilling is straight with the block!
2. Install new muffler and gasket then curl the retaining tabs to secure the bolt heads.
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Fuel pump diaphragm was bad. Gas tank rusted.
Wayne from Ogden, Utah
1 personfound this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench set
1. Removed fuel tank and carburetor
2. Sand blasted inside of fuel tank.
3 Cleaned carb and blew out fuel pick-up tubes and carb.
4. Replaced carb to tank gasket, intake gasket, and diaphragm gasket.
Take off carb and tank hardest thing is the governor linkage take a photo first I didn\'t and had to do a lot of thinking to get it all back the right way it started in 2 pulls and runs great
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Briggs engine would run when primed through carburetor throat but would then quit indicating fuel pump diaphragm was bad.
1) Removed carburetor from engine
2) Removed diaphragm cover plate from carb.
3) cleaned all surfaces and ports.
4) replaced diaphragm spring and diaphragm.
5) attached diaphragm cover.
6) installed new fuel tank and carb gaskets and reattached carburetor to engine.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP8937201
Manufacturer Part Number: 270026
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
(1979)_WW_6.gif "Part Location Diagram of 270026 Briggs and Stratton Diaphragm-carburetor")
(1979)_WW_6.gif "Part Location Diagram of 270026 Briggs and Stratton Diaphragm-carburetor")
