mercury 25hp light knock when under a load

justinspot

Cadet
Joined
May 17, 2012
Messages
20
so my qestion is what would cause a knock when under a load ( does not happen in idle ) . It is a light knock or tap that sounds like it is just below the the cowling area . Does not do all the time . Mainly just at trolling or very low speeds . Sound seems to go away if I turn the motor . I thought something in the handle was loose but I went over everything and nothing was . any ideas would be helpful . Thanks in advance
 
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