Vintage Chainsaw Collectors Lounge

[happysaws]

I've run into a slight problem with the West Bend 820, it is sucking SO MUCH fuel that the stock fuel tank vent can't keep up, causing the tank to vapor lock, and the saw to run lean at high RPM. If you listen closely in the video, you can hear it begin to run lean right before it hits the wood.

Thinking about putting something like a Poulan duckbill valve in the fuel cap. Any thoughts or other ideas?



Not super concerned about it, because the saw runs and cuts really well otherwise, but OCD just cannot allow it. LOL

 

[s sidewall]

Where is the vent for the fuel tank?

Steve

 

[happysaws]

Where is the vent for the fuel tank?

Steve

On/in the fuel cap.

 

[happysaws]

Just fitted a duckbill into the fuel cap. We'll see if it works any better tomorrow.

 

[s sidewall]

Pic

Steve

 

[s sidewall]

Just saw the post

Steve

 

[s sidewall]

Well I decided to replace my headlight halogen bulbs over to led, man they made a big difference. I can see a lot better at night and were easy to install. Time will tell how long they will hold up.

Steve

 

[Boomer 87]

Anybody got a walbro hdb for poulan 3400?

 

[LonestarStihl]

Anybody got a walbro hdb for poulan 3400?

I have a trash can for Poulans...

 

[Boomer 87]

ugh

 

[Boomer 87]

There's always gotta be one

 

[s sidewall]

[emoji35] [emoji36]

Steve

 

[LonestarStihl]

There's always gotta be one

I’ve been silent for some time. Things were going too well in here

 

[s sidewall]

LOL

Steve

 

[brandonstc6]

Anybody got a walbro hdb for poulan 3400?

I have one, pm me an address


Sent from my iPhone using Tapatalk

 

[Kensie1988]

Anyone have any idea what would cause a freahley clean rebuilt carburetor to lean way out and almost die at WOT

 

[s sidewall]

Needle valve fulcrum set correctly?

Steve

 

[95custmz]

Subbed.

 

[happysaws]

Anyone have any idea what would cause a freahley clean rebuilt carburetor to lean way out and almost die at WOT

Having the same problem with a Homelite XL-870...

 

[happysaws]

Anyone have any idea what would cause a freahley clean rebuilt carburetor to lean way out and almost die at WOT

From the 4th edition chain saw service manual,
"ENGINE RUNS LEAN. Could be caused by: (1), fuel tank vent plugged; (2) leak in fuel line or fittings between fuel tank and carburetor; (3), filter screen in carburetor or filter element in fuel pickup head plugged; (4), fuel orifice plugged; (5), hole in fuel metering diaphragm; (6), metering lever not properly set; (7), dirt in carburetor fuel channels or pulse channel to engine crankcase plugged: or (8), leaky gaskets between carburetor and crankcase intake port. Also, check for leaking crankshaft seals, porous or cracked crankcase or other cause for air leak into crankcase..."