4 hp 4 stroke. 6 years old. Horrible squealing coming from the top end in neutral forward reverse. Not the pull mechanism. Any ideas?
Someone said it might be the connecting rod.
The squealing happened last year for a while and then stopped. Ran it about 50 hours since with no problem. Plenty of oil. Just started up again and seems to be getting worse. More revs, more squealing. Definitely a metal on metal sound.