43 thoughts on “How to Replace Diaphragm and Gasket on Briggs and Stratton Engine Primer Carburetor

  1. Thanks. I replaced the gasket it worked fine for a few weeks, unfortunately same problem again, please could you advise???

  2. Thanks, my mower was running roughly so I got a new gasket and diaphragm, changed it in 30 mins using your video and now mower running great.

  3. My lawnmower will start up then it dies right out. I've changed the gas, spark plug & changed the diaphragm with the other components just as you have. Still no resolution, any ideas anyone?

  4. Great clear, precise well explained video.My newly aquired 15 year old Trojan is purring and ready for battle after a £2.50 fix.
    Many thanks.

  5. Thank you so very much! I ordered the spares today. Now I have watched your video I am more confident, and actually looking forward to fixing the poorly mower. Thanks!!

  6. Excellent video,your just like me when it comes to this stuff, I'm a firm believer in clean clean clean, i cringe when i see "parts changers" put parts back on on filthy grimy surfaces, i have to walk away,lol.

  7. Hi, I have a Briggs/Stratton mower and the oil from the crankcase is
    pouring into the carby through the breather hose, thus when it runs
    there is enough smoke to fill the neighborhood can you advise the cause
    of this thank you in advance

  8. Great job mate, that linkage was in a different position, a bit of clarity and inmportance.. But Its sorted and runs better than ever.. It was a 2nd hand gift….

  9. Thanks for the video I needed exactly that, but when I reassembled the throttle linkage doesn't seem to work. I only removed the one point like in your video. Any help is greatly appreciated, thanks!

  10. Thank you for a great video. Saved me from having to buy a new mower. I knew that the diaphragm were the problem but I didn't remember how to remove the carburator. The Briggs Stratton site was no help at all.. thanks again

  11. Ace job. Especially appreciate you reminding people to loosen screws across from each other first, before attempting to remove them individually. Thanks for the video.

  12. perfect solution, thank you very much. I got the part, followed the vid step by step and it's purring like a kitten now. IT"S IMPORTANT that you clean out that well he mentions at 3:22. I thought that dark area was a shadow. I used Q tips to get all that gunk out and was surprised how much was there. That crap alone probably was half the problem.

  13. Did the trick! My mower had a new carb fitted last year by the "service agent" – about 3 weeks and 4 cuts ago it stopped working properly. They'd made a mess of the gasket and diaphragm when fitting – followed your clear instructions, mower immediately sprang into life sounding healthy again. Thanks!

  14. Thanks. Same thing – some water in the well where the screen sits. Whatever that's for. I had an O-ring and bushing fall out of the port behind the butterfly valve port where it mates with the engine when I removed the assembly. O-ring goes in first. Mine is the same engine but it's used on a pressure washer.

  15. One other thing to check when a mower only runs from the primer fuel, if this does not work for you.

    I had removed my engine from the frame while repainting it. When I put the engine back on, I was unable to pull the rope, because it was hydro-locked with oil in the cylinder. I removed the spark plug and pulled the rope, blowing the oil out.

    I had a problem with the engine running longer than what the primer pumped into the carburetor. I replaced the diaphragm thinking that was the problem, even though it ran just fine previously, and still had the problem. After reworking it several times, I checked the oil and it was milky looking, and smelled of gas. I drained all the oil out, and it was gray. I added new oil and the mower then started. It took a bit for it to work out the contaminated oil, but that's the only other thing I did to make it work. If gas gets into the oil it can destroy the engine. Check the oil.

Leave a Reply

Your email address will not be published. Required fields are marked *