Engine has set up for 6 mos., went to start yesterday, and nothing; battery is fully charged, I can turn the flywheel by hand; when I turn the key, it gives a 1/2 second shot at turning, but sounds bogged down, then nothing; the teeth from the starter stick , and when I manually turn the flywheel, they pop down. I don't want to drop the money for starter, solenoid, or both until I make sure that's what the problem is. How do I test the starter and solenoid ?? Any help is gretly appreciated