Have a Poulan leaf blower model BVM200VS; s/n 10238N601820-2 : 10:42 that will not even try to start. Read many online discussions with no luck. Fuel mix is good, emptied tank and put the fuel in chainsaw and the saw started no problem, refilled blower with fresh mix. Changed spark plug, checked gap at 0.027 inches. Both air filter and exhaust spark arrestor are clean. Checked cylinder head mounting screws and they are tight, no evidence of leakage at the gasket. Follow the exact starting sequence as shown on the cover. Checked compression and originally had about 65 - 70 psi, soaked cylinder twice overnight through plug with Marvel Mystery oil and compression is now at 95 psi. Cylinder and piston ring look good through exhaust port and spark plug hole. Carb was replaced with new carb, and then after many other attempts went back to original carb, no help. When trying to start notice fuel mix at exhaust and on plug, remove crankcase cover and fuel mix is evident below piston. Primer works. Putting fuel directly into cylinder does nothing. Starting fluid does nothing. Originally spark looked weak, new coil installed with gap at 0.013 inches and produces nice spark with plug out, spark tester shows spark. Noticed slight air leak at plug sealing washer, polished seat and used new plug with fresh crush washer, this eliminated leak. Kill switch showed funny resistance readings when checked, entire switch and wiring removed to eliminate possibility of intermittent ground. Several comments on compression needing to be at or above 100 psi, my readings are somewhat lower but the engine doesn't even try to start. Any ideas???

Garden - Poulan