How to fix a lawn mower that leaks gas. 300E Briggs & Stratton
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- Опубликовано: 30 июл 2017
- Most Frequent Causes for Lawn mower leaking gas. The float needle valve might not be shutting off the fuel. The float needle opens and closes the float valve to allow fuel to enter the float bowl. If the float needle is damaged, the carburetor will continue to fill with fuel until it overflows.
300E Briggs & Stratton
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Made this exact mistake today cleaning a carb, Thanks for the great video.
Spent like 6 hours cussing out my mower in the backyard trying to fix it. I should've watched this first and saved myself an afternoon! You made this so simple, thank you.
That did the trick. I fixed the leak and was underway within minutes. Thanks for posting this.
I don't think i have ever seen better close up on a repair video. I am facing similar issues with toro personal pace. Thank you!
Oh my gosh so helpful. I cleaned my jets and carb check the float twice and couldn't tell it was just a bit off. I'm so glad you made this video I was getting g so frustrated. Thank you thank you thank you
Good job on the video! Straight and to the point.
Just got me a mower with this engine on it. Very helpful video for trouble shooting in the future. Thanks for the upload. And, love the Yota pickup, love my 2006 and hear the older ones were even better.
im so glad i came across your video, I have the exact same issue; thank you thank you for this
Nice video. Had similar issue with gas leaking out of pressure washer. Had it fixed in 5 minutes using your video. Thanks!
Yep, after watching this I had the same issue. I popped the pin back in place and stopped the leak. Thank's for the video!
Thank you so much!!!! I was having the same issue with my lawnmower...my float needle wasn't seated all the way in. Pushed it all the way and now my mower is running. I owe you a drink!!!
This video saved me from loosing my shit. The lawn mower was running low key and stalling out. So figured I would take the carb off and clean it watching another video. This would be my first time doing this and I'm 53. Cleand it put it back together and started it up. Ran fine for a minute and thinking it was good to go. Then I saw the gas running out of the air filter. So I took it back apart and cleaned it again. Same result with the leaking gas. I threw my hands up and went inside for a few minutes. I looked up leaking plastic carb and came across your video. Sure enough that was the problem. I put it all back together and it ran strong. 3 hrs of cleaning and fixing that carb. I can't thank you enough for your video. I owe you one. Thank you.
I have the same mower with the same problem. Thank you for posting this video. now to get parts!
Brilliant. The pin in my float was also not pushed in all the way. Resolved my leaking issue. Thanks for video.
Hi Ben, had caused the exact fault myself so really appreciate your help, one end of the float pin was not clipped in, same one as in your video, runs perfect once more, thanks, Carl
Good demonstration in your video. Especially where you worked the float & confirmed its functionality of stopping the flow after resetting.
i realize I'm pretty off topic but does anybody know a good site to watch new series online ?
@Felix Gunner meh atm I have been using Flixportal. Just search on google after it:) -samuel
@Samuel Beau thanks, I signed up and it seems to work :) Appreciate it!!
@Felix Gunner You are welcome :D
great video- which shows the possible culprits- float, needle valve or alignment, along with a simple way to test without removing the carburetor. Also, if the cavity the needle valve sits in is not smooth, gas will leak.
That was my problem as well. I cleaned out the fuel line of the mower and accidentally caused this issue. The mower is good and running now. Many thanks!
I did the something. Darn it😂
I have the same problem, but now I know how to fix it. Good instructions. Well done!
Helped me fix my lawn mower. Thanks
Man I just finished cleaning the jet inside my carburetor and didn't realize I knocked the metal pin holding the float out of place. Thanks for this video!
Thank you so much for the video!! Helped me after having leaking gas problem!!
Thank you! Guy, you nailed it that was the exact problem, It was running but leaking thank again for a great share da bomb!!!!
The lawnmower would start and die right away. I tried to open the carburetor and cleaned it, which fixed the problem. After putting it back, however, the carburetor started to leak gas. That wasn't a problem before. Guess I will have to reassemble it. Thanks for the detailed video. Awesome camera skill there.
O.M.G. I have been struggling with my TB-110 for weeks! Same janky carburetor. So far I have cleaned it, to no avail. Bored the intake jet to make it a tad larger, to no avail. Tightened the governor spring, to no avail. So I added Sea Foam to both the oil and the gas, took the air filter off, and was able (just barely) to mow my tiny yard. Yay! But I went through an entire tank of gas, and I bet my neighbor's dog that THIS is why my air filter smells like gas and why it's still not reaching full RPM's. Thank you! I can't wait to try this next! You rock! I will post an update here to let you know if the float was the culprit. :)
Thank you!! I had just cleaned my carburetor, and put the valve pin in upside down. Very helpful video!
Hey man you're a life saver ! I had the same problem, same mower. Thanks to you . I didn't have to replace the carburetor. Thumbs up to you .Thank you !
Great video !! Thanks so much for taking your time to help all of us :)
Thank you very much !! This helped me solve my mowers problem !!
Thanks for helping fix my issue! 👍🏾
Well done sir. Good camera shots.
I just discovered your DIY series, especially enjoyable for the fact you show everything, including the cut fingers (alerting us to the same sharp metal edge hazard) and your frustration at finding riveted rather than bolted construction (requiring different disassembly).
You also may have identified the problem with my older Briggs & Stratton Quantum engine carburetor, although my carburetor model is the older, non-plastic version. On this metal carburetor, the float may be misaligned, preventing the needle from entering the seat properly. Until your video, I had no way to check for float alignment and proper needle-seating. You can imagine the frustration after having carefully cleaned all the carburetor passages, checked the float for leakage and cleaned even the needle value and seat with carburetor cleaner-- only to find the same dribble of gas, as before.
As soon as I can, I'll try the simple test method you showed. With the carburetor housing still bolted in place, but with bowl cover removed and gas line connected, I'll lift the carburetor float into its "full bowl" position to determine whether the needle enters its seat well enough to stop the flow of gas completely. As your example demonstrates so beautifully, the float test should indicate whether all works properly in the carburetor bowl, but before final assembly.
For innocent bystanders planning carburetor cleaning and repair, Briggs & Stratton technicians told me to use
"85-inch pounds" on tightening the carburetor bowl nut for my Quantum engine. Presumably, most Quantum engines meet the same or similar specification, but presumption could be an expensive mistake. If you need confirmation, call Briggs & Stratton to make sure at 800 274 4485 (tech support) or 800 444 7774 (parts). This may help newbies whose only information has been "make it snug".
CAUTIONARY NOTE TO DO-IT-YOURSELFers-- gas exposed to open air is an extreme fire hazard, so never try the float test on a hot engine. Gas fumes can ignite suddenly and even explosively, especially in a garage or other confined area. Best to tinker with a carburetor and a tank of gas in the open, at least 20 feet away from the family automobile and other valuables. Although it may seem overkill (so to speak), keep a fire extinguisher in reach which is rated to handle gasoline fires (some are not). Without quickly extinguishing a sudden blaze, a fuel fire grows completely out of control and does major damage-- all for the sake of fixing a lawn mower.
In any case, good camera work. Just from curiosity, what camera did you use?
Thanks. Had the same issue with bowl pin not being seated properly. Quick fix.
Great camera work and commentary. Well done
Thank you SO MUCH, this saved me on buying a new mower.
Thanks you made my day. I thought it was the needle valve.
Enjoyed video -Thanks - theses plastic carburetors are easy to fix - just have to careful with all the plastic .
Thanks for your help . Someone had serviced the lawnmower and I guess didn't place the needle back properly.
Just what I needed thanks.
Great video it helped me out.
Worked for me. Thanks!
smart dude --great help appreciate .
You are right handed because your left glove isn't ripping, great video
May God bless you
Damn I've been taking the whole damn thing off..glad I seen this. My carb was fine till I took it apart..like many times in the past. I'm sure it is the needle valve. Gonna try this. My lawn mower runs fine. It takes about 3 mins and then it just starts leaking. Never had it happen to me before. I even took another carb off another mower same kind and they both look fine. IDK wtf it could be except this
I just "un-seized" this exact engine , took everything apart cleaned it all & after reassemble it fired up after 2 pulls ....except it was leaking gas just like this one & out the little plastic weep hole above the carb . I hope it's a crooked float lol , great vid bro !!
So was it a crooked float?
@@lml03647 we'll never know. Lol
Thank you!!
So simple. As most problems usually are..
thank you so much!
I had the same problem. Bought the rebuild kit - changed the needle and seat. Still leaking from the same little hole. To test if the valve was in fact working, I removed the bowl then lowered and raised the float. It worked normally - when UP, fuel would not come out. When I let it go DOWN, fuel would flow out. I even removed the float and tested it in a sink full of water to check buoyancy, and it floated normally. I have no idea why it's still leaking.
Good eye man
thanks was wondering why the gas was leaking and didnt know that the needle had fell out
Professionaly explained! Do these have fuel filter anywhere? Gas tank maybe?
Really helpful! Thank you!
On a side note, what kind of hater would downvote this video? 39 of them!
Great video well explained but did not sort out my problem. Float shuts off nicely when testing by hand. However on assemly still floods indicating that the float does not seem to rise up enough to shut the fueloff. does this mean the float needs replacing? Unfortunately the float is an non replaceable part short of replacing the whole carby. Interested in any feed back thank you.
How can you get the metal needle valve?
Thinkin i need a new needle valve cuz mine is plastic & it would start, but stop & leaks gas when i think i fixed any issue. Taken carb apart & cleaned. Gas & oil clean. No missin parts
I dont see leaks, but when i put gas in the level drops. Bad float? Ive had it apart and cleaned the carb.
How do you replace the primer bulb on this mower?? When i press the primer bulb im getting petrol coming out
great video and explanation
Where did you get that took box at? Now that's what I need!!!
What if it's continuously leaking gas but when I push the float up by hand stops? Thank you
Hi can someone help me? i have a mower toro commercial and it start spending a lot of gas what can be the problem?
Mine won't leak till u start priming it do u know the cause?
Man that did the trick. I clean card bout 20 times
I always use the back of my F150 as a drain pan.
I had one 3 years old' took off the engine and replaced with a 1987 brggs. much better. the 3 year old engine was sold for scrap.
My lawnmower has 2 issues. It won't start and the gas leaks out incredibly fast. I filled it and it was empty possibly 2-4 days later. Could something like this prevent the mower from starting?
Same problem I've got
@@duaneafields I just finished removing the carburetor, cleaning it, changed O-rings, changed the spark plug and the air filter. It started right up and stayed running. I don't know about it leaking gas yet, but I'll let you know how it goes in a few days. So far, so good.
Yes if it is flooded out and may not want to start
You should had took carb all the way apart disassemble it completely those jets are very tiny one drop of anything stops them up that's just me I guess
I have worked on 100s of mowers and have never seen a carb like this....looks loke junk to me...Shame on Briggs
They're crap and don't last very long. They also clog up much more often than the older metal carbs.
New ones come with a plastic needle vavle
Pos
take off the carb and doi the work... all that screwdriver prying is asking for more trouble
tail pipe. hahahahahaha
This is a example of someone screwing either the company he or she works for or a repair shop with a hard on for the customer. V
Pushing the float up by hand isn't the way to do this..I have a carb test pump that I made. Remove carb, turn carb over, put 5 psi of pressure in..if the gage go's down, it's going to be the needle seat..I use cleanser or metal polish with a dowel rod that fits tight..lap the bur out of the seat...if the needle is leaking it will fill the crank case up with fuel...if the weight of the float doesn't seal..you need to address the seat
He putting plenty of dirt into it with that screw driver
Ridiculous
L
I can't believe you did this without removing and cleaning the carburetor first! It takes less than a minute to remove it and put it on a clean shop table with good lighting. Then you can go ahead and remove and clean the cartridge, especially the main jet. I can see dirt and grime on your screwdriver blade as it's poking around INSIDE the carburetor. The tiniest piece of junk from the screwdriver will go straight to the bottom of the bowl and stop up your jet.
Nobody cares about your gloves 😂
Ethanol and bad fuel is also rotting the rubber tips off the needles. Briggs and Stratton should be nuked for taking something good and making it bad. These E series engines suck ass.
Its built poorly
you take too long to show every little thing like putting on your golves etc.
your whining sentence was too long.