Chainsaw Repair

I myself run 40 to 1 in the saws that I have including the Poulan 3400,3700 and, 3800 that I have.   If the tuning on the carburetor is correct then the engine should get enouph fuel mixture and oil to keep it lubricated.  You could pull the plug and look at it to see how it is running and look down through the plug hole to see if there is alot of carbon build up from excessive oil.  You can also pull the muffler which is real easy on the 3400 and see how much oil is on the piston.  While you have the muffler off clean the spark arrestor screen which could be plugged up.  Burn it off with a propane torch.   Let us know what you find.

2 stroke oil has changed a lot since that 3400 was made and it's recommendations on oil ratio JMO. I would drop the 16:1 ratio and I would try 32:1 or 40:1

I had a poulan and a stihl that would run till warm then start cutting out and die. Wouldnt start till cooled off. Both were coils.

   I do not know why I did not mention the coil as causing that for I have seen that also. 

Those old 3400's were likable saws out  in the woods

Interesting AF cover color.  I'll have to look.......................but I think I have a 3400 parts carcass that has an AF cover that's the same color pictured.  It's not quite as brown as that Olive covered top cover on my 4900.  When I'm in the shop tomorrow I'll try to remember to dig up that cover and shoot a pic of it next to the 4900.

I have never seen that before either.