I have inheirited a Poulan counter vibe 3400 it

I haven't seen a manual yet that shows you the fuel line route on a piece of equipment.. Generally its the most direct route from tank to carb to primer (if it has one)

You will need to disassemble the saw and clear the oil line at the least. It could also be a bad pump.

The fuel tank is integral with the plastic housing of the saw. A leak has obviously developed, I would say its time to replace the plastic housing and go from there.

Hello, go ahead to this website and type in your entire model number in the search box. It will allow you to download all available literature for your specific tool.
http://www.poulan.com/node7925.aspx

A different site that lists 40:1. http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/4a98e23d38cbda9b88256bf80015de57?OpenDocument
Oil mix is controversial. Some think more is better, todays saws run much faster and carbon up much quicker. Ask the mechanics at a local saw shop. I will wager they say 50:1 regardless of the age of the saw. Me too! The Echo site now says use 50:1 regardless of what is printed in the OM. It is your saw Mike; run what you want.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

Oil Mix Ratio: (last 5-10 years)
Dolmar, Echo, Efco, Homelite, Husqvarna, Jonsered, Makita, Oleo-Mac, Red Max, Ryobi, Shindaiwa, Solo, Spear & Jackson, Stihl & Tanaka; all recommend 50:1.
• 1 gallon of premium fuel to 2.6 ounces of quality 2-cycle oil.
• 4 liters of premium fuel to 80 milliliters of quality 2-cycle oil.
McCulloch, Poulan & Wen; recommend 40:1.
• 1 gallon of premium fuel to 3.2 ounces of quality 2-cycle oil.
• 4 liters of premium fuel to 100 milliliters of quality 2-cycle oil.
Chinese chainsaws recommend 25:1.

If me I would have the Poulan tweaked to run properly on 50:1 and use that in both. It will start easier and take much longer to carbon foul.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

http://www4.shopping.com/-chainsaw+poulan+parts

www.gaspares.com.au/catalogue/chainsaw-air_465-473.pdf
http://lawnandgarden.manualsonline.com/manuals/mfg/poulan/3450_3750.html

http://www.poulanpro.com/node4041.aspx

R² Starter Rope by SmallEng.com
http://www.youtube.com/watch?v=eRyy3MlsjVo

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

Check the spark with a clean new plug when it won't start. If absent, then the ignition module may be sensitive to heat and need to be replaced. If spark is good, try putting a small quantity of fuel into the plug hole, reinstall the plug, and try to start--if runs for a short time, then you have fuel delivery problems. Check the carburetor for looseness to the engine and the condition of the fuel lines. Check the tightness of the screws in the carburetor end plates. Are you using the choke when restarting? 2-stroke engines usually need a little help to get running even when warm.

Hi, fuel/oil mixture is 40:1 for Poulan. Hope this helps.