My Stihl, once it's running is just like new, but when I try to start it, it feels almost like the cylinder is full of water. When I remove the spark plug, the engine turns over completely easily, and the spark plug is dry. Put the plug back in, still pull rope real hard to get one revolution of engine. Do this for a very long time, and finally, though nothing seems different, the engine cranks normally and starts right up. What's going on? This saw does not have a manual compression relief knob. Any chance it has a fully automatic release that is fouled???
