Learn how to replace a primer bulb on a Briggs & Stratton diaphragm carburetor.
Tools/Parts Required
- Flat Head Screwdriver
- Replacement Primer Bulb
- Air Compressor/Carburetor Cleaner
Step 1.
Gently pry out the clips shown in the video. Push the retaining plastic clip up, this will release the primer bulb.
Step 2
Clean underneath and clear any blockages that would cause the primer to fail.
Step 3
Install the new primer by clipping it in place, or replace old if you’re just cleaning.
Thanks for posting the tutorial about replacing the primer bulb on a Briggs and Stratton 3.5HP lawn mower. It was just what I needed to help another help me in replacing one that was pierced.
Thanks good instructions I appreciate you. Don Williams retired/retarded truck driver
Replaced primer bulb but it is not pulling the gas into carburetor, What’s the problem?
It’s a 3.5hp briggs and Stratton classic. Do you have a the kit for this carburetor?
Hi
if replacing the primer bulb hasn’t worked you may need to dis-assemble and clean the carburetor, a diaghragm can be purchased here for your model.
http://www.pushmowerrepair.com/product/briggs-and-stratton-carburetor-diapharm-gasket-suits-3-5-3-7hp-engines/#tab-description
I broke the retaining clip –I think the guy in the video did too –there’s an edit right where I broke mine!
🙂
No clips were harmed in the making of this video haha! its shame yours broke they are usually quite sturdy.
Excellent ! Was stumped on replacement
Runs a short time after I prime the engine,just seems to run on the primer gas,what’s wrong?
This means that there is a blockage/problem with your carburetor, It is likely is needs to be cleaned and possibly have the diaphragm replaced
Tore my carb down and cleaned and have a new bulb. There is a small steel ball and a seal/cup that fell out and have no clue where it goes. The ball is very small and the cup has a small hole in the center. Thanks for the help.
Hi Mike
The ball & cup sit directly behind the primer bulb, There should be 3 holes behind the primer bulb, The cloest one to the air filter should have the cup & ball inserted.