Three issues....tank vents, scotch brite and the bridgeport

[@user-cb1ln8vc8d]

That duckbill check valve thing was driving me crazy on my 240. Accidentally pulled it out while pulling a new fuel line through. No luck getting the brass screen out and didn't want to risk a poor fit when replacing it. Drilled it out to the size of a husqvarna fuel line grommet and am gonna run it out of the top cover with an echo tank vent lol. Double as a tank drain with how little I use the saw in the desert.

[@johnclarke6647]

I am wondering if I have a tank vent problem on my new 372 XP. Tuesday, I ran it with a new bar, so I could get an initial tune on the carb. I then put it up without refilling the gas tank, as I usually do. The next morning I tried to crank it and it would not crank. I primed it and it cranked up but would not stay running. I sat it aside until later. I did top it off with fuel before setting it aside. Later, it cranked right up and ran normally. That smells to me like tank vent. It was hot when I ran it Tuesday and when it cooled down it could have developed a vacuum in the tank and sucked the carb, dry, overnight. Last night when it had a chance to cool down I opened the cap to make sure it was still full and to release any vacuum on the tank. I did not hear any sucking sound and yesterday I ran it down to the last quarter of a tank without any problem. Personally, I thought the check valves in the carb would keep the tank from sucking it dry. It could be leaking diaphragms in the carb that caused the gas to drain back into the tank.

[@TAO495]

Like your video!! Thanks. Dosen't the gas cap do the same vent control on other brands? If you see this let me know, please.

[@colindunn864]

carfull here just aquired 2 non genuine echo style tank vents brand new from different local suppliers both hold a vacume!! have three geuine echo power heads at home tried them all none hold vacume even slightly

[@matthewolson8875]

Colin Dunn thanks for the heads up...will double check this....

[@ronniebuck2041]

I'm not knocking your way but I had already ordered an OEM vent before I saw your video or I would have done it your way. I just put the comment on here to help someone in the future if they did like me and already ordered the stem valve, I'm just tickled that i got it to work, i have filled it up and run it a little and no leak yet with no silicone. Just a short piece of heat shrink did the trick

[@matthewolson8875]

the oem stem doesn't fit, but you are saying that with a piece of heat shrink you got it to fit? cool. is the heat shrink tube gas resistant? as long as it won't degrade you've got it made :)

[@ronniebuck2041]

Yeah I hope it doesn't degrade or at least go a year because that's an easy fix

[@rikabob]

I had the same problem on my farmertec. Drilled a hole in it, hope it doesn't leak too much fuel. Seems as if it was covered with glue.

[@matthewolson8875]

rikabob I'm now checking these vents first....then tearing them out and making the vent remote by drilling out the hole...adding a fuel line there and running it up into the air box to an echo style vent.

[@ronniebuck2041]

My vent was junk on my tank and I replaced it with an OEM vent, of course it didn't fit but I cut a short piece of heat shrink and put it over the vent tube and it fit perfect. Haven't tried it yet but it seemed to go together nice and tight. And my air filter was letting dust get through, so I inspected the filter and noticed it was a two piece just snaps together. So I used silicone around the joining surfaces, hopefully my saw is ready.

[@matthewolson8875]

I like my echo vent mod....just drill out the aftermarket vent and put a short piece of fuel line in and hook it in to an echo style vent ....works perfect

[@sundial6919]

@@matthewolson8875 do you have to dismantle saw and where do you drill at ?

[@matthewolson8875]

@@sundial6919 pretty sure it you watch the video those questions are answered

[@matthewolson8875]

@@sundial6919 but yes... remove the tank...pull out the vent...insert some fuel line. Hole needs to be drilled slightly smaller than the fuel line so the line seals. Run the line up to the carb area and add an echo vent

[@sundial6919]

@@matthewolson8875 i will re watch vid and pay strict attention . This problem has been throwing me . I have the 372xp blue china doll , checked for leak close inside carb inspection raised needle lever slightly and it did band aid sympton some what checked carb fuel line puse line everthing but crank and oilpump seal by what ive experianced as well as read vent valve may be culprit . Too bad have to take whole thing apart to get to it . They shoulda put in the carb box as you mention . Thanks for your reply

[@cory2195]

I have a husqvarna 394 with a tank vent leak its missing or warn out is there a black tube that is in the tank that the new vent screws into or does it thread into the orange tank or threads in the black insert. Cheers

[@matthewolson8875]

On the 394 I think there is a black insert...just press in and out. Not threaded. There usually is a small white puck in the black tube and sometimes a larger white one on top of that assembly

[@matthewolson8875]

Check diagrams at ereplacemenparts.com

[@cory2195]

@@matthewolson8875 cheers mate

[@johnbladykas4454]

With scratches in the piston. Have you ever tried to vapor hone the piston to get the scratches out Without removing any metal?

[@matthewolson8875]

No....pistons wear thin...best to get new if the machine marks are worn off

[@crazykincardineite]

Hey, so I've got a 350. Runs great for a while then it stalls. Open the fuel cap and air rushes in. Fires up and runs great for a while again. So I go to clean the vent. Pop off the two little white plugs and find that the hole down inside appears to just be a blind hole, can't blow air in and its orange down there like it was never drilled out when the saw was made. Can you confirm what its supposed to look like down the vent hole?

[@johnclarke6647]

The small scratches in the cylinder are probably the result of the piston billeting in the cylinder and the sharp edges on the top and bottom of the piston. It is a good practice to break the edges of the top and bottom of the piston. This will stop those little cosmetic scratches. This concept is from Harv (Ironhorse).

[@sundial6919]

No biggie just characteristic of 50 : 1

[@tylerparker4750]

Hi Matthew, i am working on a Husqvarna saw where the previous owner covered up the tank vent with JBweld or something. So my fix was i purchased a DuckBill Tank Vent from Stihl, i drilled a hole in the top of the tank and pushed it in... thats it... do you think this is a sufficient fix... Is the location of the vent important ? i see no reason why a DuckBill can't be used on an old Husky, Any thoughts ?

[@matthewolson8875]

no issue, other than servicability. i've moved vents on these 372s into the carb box so I could easily get at the vent and its less likely to become gunked up :)

[@ocsplc]

On he Scotch Brite, as long as you cross-hatch it, should be ok, right?

[@matthewolson8875]

Cross hatch is best yes....supposedly

[@darrensmith9143]

I too thought I'd save around $150 CND and ordered one of these Chinese tanks for my 372. My problem turned out to be the gold vent leaking from day 1 until now where it leaks so much as to render it unusable after a few months use. Back to OEM, may as well have burned the money spent on the cheap tank.

[@matthewolson8875]

I've figured out the solution...its cheap and easy. .... I think. lol. Pull the gold vent out, with the black plastic housing. Drill out the hole in there to just smaller than the diameter of some fuel line. stick some fuel line in there with an ECHO tank vent attached. :) look up echo tank vent on ebay, .... the cheap ones work fine

[@paulburgess8033]

My Husqvarna 460 starts 2-3 pulls cold ,, it runs great ,, out of the blue ,it has a problem starting when hot , or just running a couple minutes... I have to hold full throttle to get it back running... After it's running it runs great again... Fuel tank does seam to have excessive pressure.. I hear a gurgling/hiss sound coming from the carb.. . This all started half way through a work day

[@matthewolson8875]

What is compression....did u pull the muffler to check? Does it start right back up if you open the fuel cap?

[@paulburgess8033]

@@matthewolson8875 the saw runs great,, very strong ,, ,, I done some tests today and if I open the fuel cap (relieve pressure) before I try to start it , the saw starts first pull,,, the problem started 2 days ago,,, I've had the saw for years,, bought it new.

[@matthewolson8875]

@@paulburgess8033 try a new tank vent...old one might be clogged

[@paulburgess8033]

@@matthewolson8875 so I pulled the vent and cleaned it with brake cleaner ,,,, that fixed the problem I think ,, the saw now starts back after 1-2 pulls ,, I will order some new vents... Thank you for your time/ help

[@CanadianDirt]

I’m dealing with this exact same tank vent issue on the aftermarket tanks. What has been the best solution for you now that you’ve had to deal with this vent a few times?

[@matthewolson8875]

Lately I've been adding an echo style tank vent...they are cheap and effective even if you have to rig it

[@CanadianDirt]

@@matthewolson8875 thank you. I will do that to the one I’m fighting right now.

[@KurtMcComb]

Same problem here, bought me a cheap tank from China . I was scratching my head trying to figure out how the new vent could possibly be the same, i had not taken the old one out yet, as the new part i had just purchased.

[@matthewolson8875]

Yup. ..just add an echo vent

[@KurtMcComb]

Any one in particular?

[@matthewolson8875]

just search ebay for them, they are white, then drill out the existing tank vent and add a piece of gas line and the new echo vent... i think i did it in this vid. work well if your china vent isn't workin

[@KurtMcComb]

looking at chinese timbertech, its what popped up, for $2

[@matthewolson8875]

just check them with a mitivac before you install. make sure that when you pull a vacuum that they leak. i've found the chinese echo vents are ok, but ya gotta check em

[@calebwillhelm2635]

LMAO same here man. My pops DESTROYS anything he borrows or takes from me bc as he says he gave me life. I bought a husqvarna 440 xtroq for $40.00. Was running lean. Couldnt ever find the leak so i just retuned it to make up for the extra air lmao. So when my pops wants to borrow a saw he gets the 440

[@matthewolson8875]

Sounds like a fine loaner :)

[@calebwillhelm2635]

@@matthewolson8875 last time he borrowed my MS250 he got the bar wedged while cutting. Yanked it out with his truck hahahaha.

[@matthewolson8875]

@@calebwillhelm2635 always bring 3 saws into the woods...just for that reason lol

[@calebwillhelm2635]

@@matthewolson8875 hey if you dont mind and id really appreciate it. But why would fuel drip out the vent itself. Not necessarily around it. And do the 440xtorqs usually dump alot of oil out? Reading the manual it seems that its designed this way. But compared to my other saws that don't leave any oil while sitting. The 440 always leaves a little puddle

[@matthewolson8875]

@@calebwillhelm2635 all of my saws puke all their oil out. Especially when the temp goes up and down a lot in my shed. Fuel can drip out a tank vent ....but it may be a good idea to replace the vent. Lesson learned is simply to drain oil and fuel after use...that way no leaks during storage

[@garymcburnett4570]

tap the whole put fitting in for plastic hose

[@matthewolson8875]

Not a bad idea

[@ocsplc]

It means no Farmertec