Hi All,<br /><br />After hitting debris and mangling a propeller. I visually checked the lower unit(looked ok), checked the lower unit for water in the oil(none present), and installed a new Hustler propeller that matched the OEM spec propellor. 21 x 14.25<br /><br />When I run above 2500 rpm and quickly power down to neutral I get a creaking/squealing (not high pitched and not grinding) sound. <br /><br />Any thoughts?<br /><br />Jim Post