Was playing around in my yard with my son's blaster (1989), I shut it down in the driveway and then went back a few minutes later, started it in neutral and when I shifted it to first (with clutch in) it died, acted like clutch was not in, tried like three or 4 times and it would die the minute it was shifted in to gear (with clutch in). I shut if off and rocked it back in forth in gear, shifted back to neutral and started it. Acted fine after that. Any ideas if this is an impending clutch problem? (haven't had any issues with clutch till this, just bought it used about a month ago)