Question about Briggs & Stratton Briggs Stratton Lawnmower Lawn Mower Short Block
Does it stop fuel level always the same in tank this really sounds like a vacume leak
Posted on Jun 24, 2014
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Posted on Jan 02, 2017
Try draining the carb and gas tank into a small plastic bowl and look for water in the fuel. I you have a diaphragm type carb it might just need a new diaphragm and spring.
Did the stumble start right after refueling? If so then your gas can may be carrying some water too. It happens. I have seen gas can with INCHES of water in the bottom! True story. I went to a customers house after she had both her walk behind and rider stop running. She said both were fine until she refueled and then...no start. I looked at her gas can and it was terrible!
If you are trying to clear the main jet you need to get inside the carb and clean from the fuel inlet side. Bowl carbs usually have removeable jets that you can look through.
Good luck and be careful!
Posted on Jul 13, 2010
check your air filter. If it's clogged, the engine will spool up to keep from dying, run for about 15 seconds, then it will happen again. If that's it, just clean the air filter. Solved my problem
Posted on May 17, 2011
SOURCE: I have a Bolens Model
Sounds like you have dirt/debris in your caburetor jets,fuel passages or a diaphgram that is becoming non-flexible.
NOTE: Before you dissemble the carburetor:
Make sure you mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you dissemble the carburetor into separate pieces.
That way you will know which way it goes back together when you reassemble it.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Also check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one.
Also make sure you are using fresh fuel
If the mower is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank and run for short periods of time.
I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Once you have your carburetor rebuilt that should solve your problem.
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Posted on Jun 27, 2011
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