Mastermind tank vent mod

[Duane(Pa)]

That's how I keep my sh!t together: Bubble Gum & Bailing Wire. Lol! Cheaper than a shrink...

 

[treesmith]

This is on a 346, was stalling out and dying, wouldn't restart after a cut. Would cut fine, loads of power and no hiccups at all, stop and try to restart and would be flooded, sometimes peeed fuel out of the airfilter.

Top of tank connections front to back are plugged primer -- vent line to intake elbow -- fuel line. Fuel pees out of the elbow if you turn it upside down or fill it.
Anyway read about trying a stihl tank vent

660 tank vent pictured as it fits under cover, just trimmed the line

Elbow connection was plugged with a bit of toothpick in fuel line with a squidge of dirko

 

[Mastermind]

I like that word "squidge".

Is that a technical term?

 

[Duane(Pa)]

Squeeze a smidge. Don’t fur get the toothpick.

 

[treesmith]

I like that word "squidge".

Is that a technical term?

English origin used by men in sheds

 

[danimal]

I like that word "squidge".

Is that a technical term?

That's less than a smidgen, more than a c*nt hair..

 

[Duane(Pa)]

RCH?

 

[Mastermind]

RCH?

Blonde

 

[grizz55chev]

RCH?

Blonde is thinner!

 

[Duane(Pa)]

Pics?

 

[cnp1]

Took my main work saw back (346) apart used some ultra black rtv to plug the extra hole I drilled.To much fuel in filter like the man said and was flodding out easier after stopping to refuel.It also would start without choking when cold.I use bailing wire to push the guts out of the vent.
If you don't know what bailing wire is stop reading this post

Someone posted that Mastermind wrote about a tank vent mod that would work on a husky 350

Can not find it, any help??

All information listed under modification works. However I am missing the main point, why modify when the vent is available?

 

[Mastermind]

All information listed under modification works. However I am missing the main point, why modify when the vent is available?

On a ported saw especially, the vent sometimes doesn't allow enough air into the tank to match outgoing fuel flow. Now.....I've begun to think that was due to the fact that the vent hose was attached to the air filter elbow.

 

[kneedeepinsaws]

On a ported saw especially, the vent sometimes doesn't allow enough air into the tank to match outgoing fuel flow. Now.....I've begun to think that was due to the fact that the vent hose was attached to the air filter elbow.

Are you thinking the amount of air the ported saw is breathing is forming a Vacuum in the tank?
Maybe this is why they removed this ‘feature’ that was on old 562xp intake elbows?

I personally have found that the stock husky vents are quite restrictive for the 372 series.

 

[Mastermind]

Are you thinking the amount of air the ported saw is breathing is forming a Vacuum in the tank?
Maybe this is why they removed this ‘feature’ that was on old 562xp intake elbows?

I personally have found that the stock husky vents are quite restrictive for the 372 series.

A ported saw just needs more fuel. The vent is barely good enough for a stock saw.

 

[Mattyo]

So another option is to drill out the tank itself large enough to fit fuel line snugly. Insert a length of line into the tank so it stick in the tank about an inch. Have whatever length of line outside the tank goninto a convenient spot in the carb box.... Then add an echo duck bill vent. No more silly husky pucks.

 

[kneedeepinsaws]

So another option is to drill out the tank itself large enough to fit fuel line snugly. Insert a length of line into the tank so it stick in the tank about an inch. Have whatever length of line outside the tank goninto a convenient spot in the carb box.... Then add an echo duck bill vent. No more silly husky pucks.

i was contemplating drilling the vent hole large enough to accommodate a 1/4”NPT tap. From there you could thread in with gasoila tape and dope a brass pneumatic barbed 1/8 nipple. They even make them thread X barbed with a built in 90.

i found that the green plastic 90’s make a crappy seal sometimes especially if the inner vent is damaged.

 

[Mattyo]

Once you drill it big....tough to go back hehe.

Another thing to watch out for is that the fuel line is patent if you drill the tank and use snug line. The way to check is take a ultra short piece of line and put it in the hole...then use a drill bit to check that the hole is patent.