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Yes, the primer bulb had no hole.

Fixed. Previous owner replaced primer bulb with the wrong one. I replaced with the correct one and mower runs great. I did not know that there were different kinds.

Unless I am looking in the wrong place, under troubleshooting it says to go to briggsandstratton.com or call their help line.

Tried to start today , and does the same thing, starts then dies after couple seconds.

123K02 0456 E1 050601 FB Changed out the o-ring gasket on carb, and seems to run. Will let it set a couple days and see if it will run.

Don't smell any gas in the oil. Swapped in another coil, runs couple seconds longer, but still dies.

Have a craftsman 917.379470 with B&S 6.5 hp motor , with primer bulb. Primes great, can see plenty of fuel when I prime it. Starts on first pull, then dies in about 2 seconds. Cleaned carb in ultrasonic cleaner, fresh gas, new spark plug. Had a new chinese carb I put on and it does the same...

Installed the O-ring kit and it runs great. No more popping or sputtering. Thanks for the help.

Just ordered o ring kit. Thanks

Took the carb bowl off and cleaned, sprayed the jets. Still pops. Should I take carb completely apart and clean, replace jets?

Forgot to mention guy said it was running fine til he ran out of gas. When it started to run bad he replaced fuel filter and fuel pump. Maybe dirty carb?

Swapped coils, seems to run worse, still have temp difference.

Guess I could swap coils.

I checked the valves at TDC on compression stroke.

Trying to help my neighbor. John Deere L120A B&S 20hp twin,406777 0139 E1. Has some popping and loss of power. Checked with infra red thermometer and the right side exhaust is about 100 degrees cooler than the left. 1. swapped plugs, no change. 2. checked compression, both around 140...

I adjusted the cable so that it is at it's longest and the self-propel still works, but still have the same problem. Will check the drive gears, and look for a new belt.

Recently bought a used Toro model 21352. Runs great, self-propel works, but mower will not let me pull backwards while it is running. As soon as I shut it off, it rolls freely. It is like it will not release tension on the belt . Looking for ideas to fix. Thanks

Thanks, hope that it didn't get too hot. Guess I will just have to keep mowing with it and see if the problem returns.

Picked up a Craftsman YT4000 with 24hp Briggs that was running poorly and popping etc. Cylinder 1 intake valve was too loose, and exhaust valve was way, way too tight. Runs fine after adjusting them. Was just wondering what causes them to get so far out of adjustment. Only has 170 hours on it.

No, don't have the room to work on it this winter, I think I will take it apart next spring and see if the pump is bad.

Took off the exhaust, the port looked good. I ran it for a couple minutes without the exhaust and it still spit gas out of the primer. I guess I might just have to use it that way.

Can that be easily fixed?

no, looks good

Dug out my snow blower, Homelite 320, 2 stroke with a walbro carb. put in fresh gas and got it running, but it keeps spitting gas out of the primer bulb. Have never worked on 2 stroke before, does anyone know what might be the problem?

Have tried bleeding 8-10 times, still the same, both wheels turn then after about 5 seconds the right wheel stops. Should I keep trying to bleed, or try something else?

Bleed again at low engine speed. Noticed that when in forward both wheels turn, then after a few seconds the right one stops. Same in reverse, the right one stops. Went back and forth about 10 times. Without releasing the bypass, it takes some effort to push, I do have a tilt trailer, may try...

To bleed, I raised the rear off the ground and ran it back and forth from forward to reverse multiple times, is that the proper procedure? Used synthetic 20w-50. Not sure what hydro, tag says hydro-gear then has a bunch of numbers. It is quiet for the most part. When it stops moving and I...

Recently picked up a Craftsman rider model 917. 273160 with hydrostat. Runs great, but was moving slow, and after mowing about 15 minutes it stopped moving. I replaced the drive belt, but no improvement. Replaced the fluid in the hydrostat, again no improvement except after warming up it...

Removed the idle screw and cleaned carb again, no change. Had ordered a ebay carb a week ago just in case, came today, put it on ran worse than the original carb. So, I picked up a used nikki carb from a friend that was dumping gas out of it, swapped my needle and gaskets from my original...

Picked up troy built pony rider with B&S 17.5 hp single cylinder with nikki carb. Had sat in garage for about 3yrs. Cleaned carb and replaced o ring and gasket, runs good except at low throttle. Surges some, not too bad, and pops at idle . Never had one of these hikki carbs before, is there...

Turns out it is the new carb. Put my base on a friends mower with the same style carb, and it primes with no problem.

not sure

yes, then tried using two, still nothing

Got a new base, will still not prime. Shoot a little air from the air compressor thru the hole in the primer bulb and that primes it, not sure what to do next.

Yes, after looking closer, the base was warped. Thanks

I have a Craftsman push mower with a 6.75 MRS Briggs and Stratton engine. I picked it up cheap, because it was not running. I put a new carb and gaskets and it will only start with starting fluid. Once started, it runs fine. Primer bulb looks good, even tried primer from another mower, but...