I got a silly question...

[spencerpaving]

I'm working on a project and can't seem to pump enough fuel...do you get a stronger impulse signal from the crankcase /transfer tunnels on the cyl...or from the intake manifold?...currently I'm tapped into the intake but I think I will get a stronger signal if I tap into the side of the cyl

 

[VinceGU05]

i would think cylinder. remember turning over the 084 by hand and could feel the air come thru the little barb into my face 8" away.

 

[Guido Salvage]

Servo motor off the generator...

 

[ABarrick]

Crankcase will provide a better pulse signal. Intake manifold would be more of a vacuum signal.

 

[Chainsaw Jim]

If you're talking about the difference between a Stihl with a barb at the base of the case versus a Husqvarna with the impulse traveling through the intake block to the carb then there should be no difference.

 

[TJ the Chainsaw Mechanic]

Just put an electric fuel pump on it.

 

[Adirondackstihl]

Case

 

[spencerpaving]

Thanks guys...I think I have room to tap into the cyl...gonna try that

 

[Poleman]

Before you start drilling...have you tryed raising the needle arm up a little? Not sure how lean your running or what saw but that can help give more fuel.

 

[Motorhead]

Ditto on the metering needle.

 

[spencerpaving]

Before you start drilling...have you tryed raising the needle arm up a little? Not sure how lean your running or what saw but that can help give more fuel.

Yes I have tried alot of things with the carb....the carb is a hl360...trying to get it to run 12026 fuel

 

[Poleman]

Not sure what the 12026 fuel is but I suspect its more of a jet issue than a supply issue. If the fuel is high alcohol it will require larger jets....up to 20% larger.

 

[a. palmer jr.]

Alcohol fuel also requires a higher compression to produce the same power as gasoline..

 

[spencerpaving]

Carb is all drilled for fuel....just can't seem to pump it

 

[Poleman]

Ok....good info there! Does the saw start and run but just fall on its face up top or ?????

 

[spencerpaving]

Ok....good info there! Does the saw start and run but just fall on its face up top or ?????

Yes

 

[paragonbuilder]

Whatcha building Bret?


Sent from my iPhone using Tapatalk

 

[Poleman]

If you raised the needle arm you may try a weaker spring so the needle opens sooner and easier. With the arm higher and the spring weaker it should be completely open at WOT and give more fuel. Possibly may need to drill the feed hole under the needle larger.
Those would be two things to try before getting radical and not being able to reverse changes.

 

[Chainsaw Jim]

The metering lever getting raised will only cause high idling problems.
A narrower venturi will give more atmospheric velocity at the nozzle to pull more fuel at wot.
Or you've basically created a flood limiter and there's too much fuel no matter what you do.

 

[spencerpaving]

Ok...plumbed a fitting into the side of the transfer tonight....it is now pumping fuel like a mofo! Thanks guys