WHAT IS THE FUEL/OIL MIXTURE FOR A POULAN PREDITOR 2150 CHAINSAW?

you can start by adjusting the air fuel intake by turning the adjustment screws in all the way then out 3 full turns then do half turn adjustments until its right

Take the exhaust off so you can see the side of the piston, if it is scored or damaged it means it has probably been run without oil added to the petrol.
That can cause the problems you are having, if it is throw it away, its not worth repairing

Did you put the right diameter fuel lines back on?

The 2150 has a remote primer, so there will be three pipes, the pipe coming from the fuel tank with the fuel filter on the end is the main fuel tube, this fits to the connection on the carb nearest to the pump cover on the carb ( alluminium cover held with a single screw ) the other connection on the carb has a pipe to the shorter of the two connections on the back of the primer ( suction side ) the longer connection on the back of the primer ( pressure side ) has a pipe back to the fuel tank, so the primer pulls fuel from the tank, into the bulb, and dumps it back to the tank, it does not push fuel into the carb, this way you can depress the bulb as many times as you like without flooding the engine.

245 here:
http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/30945e6822106f5388256b3500246efa?OpenDocument

306 here
http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/9a98d7ae6c77deaf88256b350024ae42?OpenDocument

I use 50:1 in everything.
Fuel/Oil Mixture

1. Use a quality 2 cycle oil and mix it to the OIL suppliers recommended ratio. Today I use Stihl 2 cycle oil mixed @ 50:1 in a Pioneer that I purchased new in 1980. There are no gouges or scratches on the piston or cylinder and I have no carbon build up on the piston top. The manual (on stone tablets) recommends 24:1. Over the years the mixture has leaned from 24:1 (Saw Recommendation) to 28:1 (Lawn boy mower recommendation) to 32:1 (Oil provider 2gal premium/8oz chainsaw 2-cycle engine oil - used for many years) and finally the last 5 (±) years 50:1 (1gal premium/2.6oz Stihl 2-cycle engine oil)
2. Any fuel containing ethanol is not good with chainsaws. Mix what you expect to use within a few weeks. Anything over 1.5 months old use up in a 4 cycle engine. HTH

Lou

Your manual says 40:1 (1 gal premium/3.2 oz quality 2-cycle oil). If you are going to tweek it anyway use 50:1 (1 gal premium/2.6 oz quality 2-cycle oil). Clean the air filter first. Lou

You can View a Diagram of the Chainsaw here http://hayward.arinet.com/scripts/EmpartISAPI.dll?MF&app=ASP⟨=EN&TF=Mainfram...

Select the Catalog Poulan/Weed Eater. Then Select Poulan. Then Select Gas. Then Select Saw. Then Scroll Down to your Model Saw i.e 2150.

Regards
Marc

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

as a starting point 1 turn on both