hi guys, I recently purchased a lawn boy with a few issues. first off I have to prime it 5-7 times to get it to start then I need to keep pressing it 4-5 times to keep it running. when it warms up it runs fine. after running it and I shut it off it takes awhile to restart and sometimes doesn't at all. iv cleaned the carb and checked the plug. is there anything common I should check that would cause this problem? also have 120psi compression.