interesting issue happening. Engines a kaw fh480v ds20. Just started happening and atm intermittent, either starter gear (maybe called pinion gear, not sure) but will spin up and engage flywheel and engine starts or starter gear will mesh up with flywheel and here's my issue, it will not turn and pretty much stick. Times it will release but had to spin flywheel to release. starter motor works either way. Someone mentioned it sounds like an issue with the gear assembly but just wondering could this sound like something cause by a weakening battery. Long story short, got the battery from bout two yrs ago, they ordered the wrong one so used the one he had. Was a smaller battery but gave me nice discount to go with a gurrentee, (if I spelled that right). Anyways pretty sure it's the starter but wondering by chance my discounted battery could be coming back to bite me.