8 hp clangs

[small motor man]

Oh I feel so stupid It is the deck I tried to check the engine and it made no noise so I put the spark plug in and started it and there was no clunk so I thought if put it back together and go and as I started it up again it made a faint nock so I decided I'd better check the deck and the bearings in the deck are wore but know I'm wondering if I did something wrong because the deck bearings are only 2 years old

SMM