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2000 70hp evinrude 4-stroke chattering noise

ABZZ

New member
I have a 2000 70 hp 4-stroke evinrude that runs great. last time out while under power it started making a "chattering" noise . The noise seems to be coming from below the power head. If I put in netural the noise seems to go away. I removed the lower unit but there is nothing loose in there. Everthing seems tight. Could it be an exhaust baffel?? any ideas??
 
Problem found! Some missing teeth on a drive gear in lower unit. No explanation of why it happened. Metal chips in oil and bearings in lower unit. Need to rebuild/replace unit. "big bucks"
 
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