My fuel cap story...Late December 96...Bosnia (NATO not UN). I had a 10K GenSet (DED) that kept running out of fuel. Kicked my butt for weeks (no support no parts). I couldn't figure out why or how until I was holding/fiddling with the fuel cap cussing and carrying on trying to figure out why...I noticed the center pin wasn't 'springy''...I replaced the cap and BOOM goes the Dynomite! Victory! Crazy how we can't see the forest b/c all the trees are in the way. My fuel cap story
Cool, I just ran into the "non-venting" gas cap and was wondering about these type caps, no pinholes. I have never had this issue before I took apart my carburetor three times. Then finally, I figured out it was the gas cap. And to add insult to injury, this is a new tank, I replaced it this season. The old one had a leak. And I was doing my normal spring maintenance stuff. Started right up sounded good, started mowing and it did the sputtering thing. Of course, the first thing I thought was I did something wrong with my carb cleaning. After the 3rd time, I searched the internet and of course all it said was carb stuff. After a day or so of searching, I finally ran into the mention of the gas cap. I said no way, it's freaking brand new. After doing the simple fuel flow test, low and behold, it's the damn gas cap. Luckily, I didn't throw out the old tank, yet. I put the old cap on it (15+yrs old) and no more venting issues. But the old one is beat to hell on the inside & the new is...well new. It's for a Briggs & Stratton engine. That's what I get for buying a generic replacement $36 vs. $56. But damn $56 for this gas tank...SHEESHED. LOL
From my own experience that check valve ( Vinton or neoprene) will get chewy and soft from fumes over the years and will almost glue itself so it won't open or aloud air coming in. You clean it and only will solve it temporarily. Better replace it.... good job #mowermedic1
How do you know the gas cap is bad? I have a bad boy mower and it’s not pulling fuel from the side with the blade controls and ignition but it pulls from the opposite side. This just started happening.
I have a Crapsman Lt1000 riding mower. After running it 10 minutes it shut off. Ill restart it and it will fire up for 2 seconds then die. I can do this till the battery dies. Ive tried 2 different carbs from Scamazon but the same result as mentioned above. I ordered a new gas cap, hoping this will fix the problem
@THEMOWERMEDIC1, This is unrelated but where did you train to be Stihl Certified or let me ask do you know if they offer courses in West Virginia, I'm working at Greater Huntington Park & Recreation. They chose to go all Stihl. Just asking. Thank you. JD
@@THEMOWERMEDIC1 that's what I thought thank you, oh if your curious I'm replacing cams the back plates come off, our main mechanic before I got on he's had push rods come out. For us their problematic, hopefully if I can get the training that won't be a problem. I use my 3020 Echo more and more I love it.
Great video. Correct me if I'm wrong, but isn't that vent system not so much a tank vent but to maintain that tanks fuel pressure to those levels. Wouldn't a tank vent have the duck bill the other way around?
...... The inner part of the rubber valve opens to prevent a vacuum forming, (as per previous video). The outer top seal of the rubber valve opens to release pressure when the liquid expands (ambient heat). I will stand corrected if wrong, as I enjoy learning.
@@donens9310 ..... Yes, including water vapour depending on humidity. We are only talking small amounts but expansion/contraction every day for the period between use. Don't fill the tank until it's needed, avoid a full tank that sits for extended periods.
@@donens9310 .... P.S. It also expels fuel vapour when the liquid expands. That why the fuel lowers in octane level and becomes stale, harder to ignite, less power etc.
If it was mine not a customer's I would drill a small hole in it and call it good. The same people requiring these special evap style caps want to make internal combustion engines illegal on lawn equipment.
If I can take it apart it’s “serviceable”! Jeez - a pocket screwdriver and anything else to fit in there and it pops open and a readily available check valve? How is this NOT serviceable?
Up here plastic grocery bags are band, I have to drink my pop from a paper straw. But when lawnmower plastic gas cap fails I'll just throw it in the landfill and buy another. Makes a lot of sense!....you're not even helping out the local economy cause the cap is made overseas.
It's just one of those things to wear why waste your time cleaning it it would be more headache trying to clean the thing just for it to give you the same issue it did before you attempted to fix it no more than those things cost just replace the damn thing jeez stop trying to fix stuff that was not designed to be fixed people
Good stuff, thanks for showing the internals of the gas caps and how they actually work.
Great video , love to do things like that myself . You never stop learning , or thinking .
Good sound effects. I'll never forget what a duck valve is from now on...lol
Loved the video!!!
My fuel cap story...Late December 96...Bosnia (NATO not UN). I had a 10K GenSet (DED) that kept running out of fuel. Kicked my butt for weeks (no support no parts). I couldn't figure out why or how until I was holding/fiddling with the fuel cap cussing and carrying on trying to figure out why...I noticed the center pin wasn't 'springy''...I replaced the cap and BOOM goes the Dynomite! Victory! Crazy how we can't see the forest b/c all the trees are in the way. My fuel cap story
Mine was the same but i also had spider webs in my ports. I've ordered the new cap.
I really enjoy your videos.
Cool, I just ran into the "non-venting" gas cap and was wondering about these type caps, no pinholes. I have never had this issue before I took apart my carburetor three times. Then finally, I figured out it was the gas cap. And to add insult to injury, this is a new tank, I replaced it this season. The old one had a leak. And I was doing my normal spring maintenance stuff. Started right up sounded good, started mowing and it did the sputtering thing. Of course, the first thing I thought was I did something wrong with my carb cleaning. After the 3rd time, I searched the internet and of course all it said was carb stuff. After a day or so of searching, I finally ran into the mention of the gas cap. I said no way, it's freaking brand new. After doing the simple fuel flow test, low and behold, it's the damn gas cap. Luckily, I didn't throw out the old tank, yet. I put the old cap on it (15+yrs old) and no more venting issues. But the old one is beat to hell on the inside & the new is...well new. It's for a Briggs & Stratton engine. That's what I get for buying a generic replacement $36 vs. $56. But damn $56 for this gas tank...SHEESHED. LOL
Another great and informative video by TheMowerMedic1!!
Great new information.
TY just this past week, I was wondering what the caps look like on the inside & how they work.
Learn something new each day with you mm1 👍
Nice show and tell of that gas cap.
I knew of I Jung around look enough I would her a duck bill work!quack quack!thank you sirbi learned a great deal of useful information
Thank you!! 😀
I am sure that this video helped some people. Thanks.
Good to know. I wonder if putting a non functional cap into an ultrasonic cleaner would be helpful.
Good info
From my own experience that check valve ( Vinton or neoprene) will get chewy and soft from fumes over the years and will almost glue itself so it won't open or aloud air coming in. You clean it and only will solve it temporarily. Better replace it.... good job #mowermedic1
Good one thanks
How do you know the gas cap is bad? I have a bad boy mower and it’s not pulling fuel from the side with the blade controls and ignition but it pulls from the opposite side. This just started happening.
I have a Crapsman Lt1000 riding mower. After running it 10 minutes it shut off. Ill restart it and it will fire up for 2 seconds then die. I can do this till the battery dies. Ive tried 2 different carbs from Scamazon but the same result as mentioned above. I ordered a new gas cap, hoping this will fix the problem
I received my new tank today and I remove the duckbill. I all drill extra 1/8 hole. I need to always breath as auxiliary tank.
Hey mm1,any chance of a sticker for my collection?
Quack Quack !! LMAO : )
@THEMOWERMEDIC1, This is unrelated but where did you train to be Stihl Certified or let me ask do you know if they offer courses in West Virginia, I'm working at Greater Huntington Park & Recreation. They chose to go all Stihl. Just asking.
Thank you. JD
I got my certs through stihl them selves
@@THEMOWERMEDIC1 Did you ask cooperate or go through a dealer I'm unsure of who to ask. Thank you.
@@jdclay1547 dealer
@@THEMOWERMEDIC1 that's what I thought thank you, oh if your curious I'm replacing cams the back plates come off, our main mechanic before I got on he's had push rods come out. For us their problematic, hopefully if I can get the training that won't be a problem. I use my 3020 Echo more and more I love it.
Great video. Correct me if I'm wrong, but isn't that vent system not so much a tank vent but to maintain that tanks fuel pressure to those levels. Wouldn't a tank vent have the duck bill the other way around?
...... The inner part of the rubber valve opens to prevent a vacuum forming, (as per previous video).
The outer top seal of the rubber valve opens to release pressure when the liquid expands (ambient heat).
I will stand corrected if wrong, as I enjoy learning.
@@robbieaussievic I'm confused. For the duck bill to open, doesn't the tank draw air from the atmosphere into the tank.
@@donens9310 ..... Yes, including water vapour depending on humidity. We are only talking small amounts but expansion/contraction every day for the period between use. Don't fill the tank until it's needed, avoid a full tank that sits for extended periods.
@@donens9310 .... P.S. It also expels fuel vapour when the liquid expands. That why the fuel lowers in octane level and becomes stale, harder to ignite, less power etc.
@@robbieaussievic I agree. But what opens the duck-bill, since the fuel vapour can't open the valve since only outside pressure will open the valve.
I probably would buy a new one also , they don't make that plastic too take apart most the time .
Duck bell, funny
My kubota has that looks like that
i think they should make them all severable.
AIN'T GOT NO GAS INIT EMHEM
It's a duck!! Who knew!
TIME IS MONEY IS IT WORTH THE TIME
Yep, it will get clog or worn out. I just pull all of it off. Cause me a stall in the water.
If it was mine not a customer's I would drill a small hole in it and call it good. The same people requiring these special evap style caps want to make internal combustion engines illegal on lawn equipment.
You can drill as many holes in it as you want to it’s not gonna stop the thing from getting clogged up
If I can take it apart it’s “serviceable”! Jeez - a pocket screwdriver and anything else to fit in there and it pops open and a readily available check valve? How is this NOT serviceable?
Up here plastic grocery bags are band, I have to drink my pop from a paper straw. But when lawnmower plastic gas cap fails I'll just throw it in the landfill and buy another. Makes a lot of sense!....you're not even helping out the local economy cause the cap is made overseas.
Furl cap, Gas is not l liquid 😂
Don't waste valuable time trying to fix something that ain't supposed to be fixed.
It's just one of those things to wear why waste your time cleaning it it would be more headache trying to clean the thing just for it to give you the same issue it did before you attempted to fix it no more than those things cost just replace the damn thing jeez stop trying to fix stuff that was not designed to be fixed people