I had my s30 put away for the winter and just dug it out lastnight. I noticed that when trying to start it that the pullstart doesnt turn the fly wheel.. It budges it some but if i remember correctly when i would go to start it last summer i would meet resistance and ghe flywheel would engage. When i turn the flywheel by hand i feel the piston is getting compression. (hopefully i articulated that correctly as i am a newbie to nitro RC) I havent been able to get gas into the gas lines. Not sure if that means anything at all. I would love to get this up and running again. I had a blast with it last summer. Any ideas as to what the problem might be? Hopefully its just user error.
Thanks in advance for taking the time to read my post!

The one way bearing is likely slipping or the pull start isn't engaging.  Take <span style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">the pull start off and try to turn the engine by just grabbing the one way bearing.  That will confirm if it's locking when turned or not.</span>

if you pull the starter cord and cannot feel the motor rotate fully at least 2 times (per single pull) then the starter is slipping.

sometimes you can pull off the starter (careful, there is a spring that can fall out of the starter case) and clean up the bearing and reinstall the starter and it will work fine again. Sometimes it will even "self clean" if you work the starter enough.

yeah check your one way bearing....pop it out spray it down with some nitro cleaner or motor spray !