I rebuilt yet another 290 which I turned into a 390, new piston/cylinder, seals, sealed up bottom end good with Dirko, put it all back together and now it won't start. It seems to have plenty of compression, spark, fuel and pulse line okay. I tried two new spark plugs but no difference. I squirted a small amount of fuel into sparkplug hole so the cylinder had fuel but it wouldn't hit even a little. This isn't my saw and I don't know what's been done to it in the past except for dirt and grease which I cleaned off. I had the flywheel off when I did the p/c and sure I put it back right but it sure seems like it's out of time. Guess I'll go out tomorrow and check compression and maybe part number on flywheel. Any suggestions?