Knocking Motor Noise: Oil Solution or Serious Issue?

Question
motor still runs but is making a knocking noise.  Can i double up on the oil and make it stop making the noise or is it more serious?

Thanks in Advance,
John

Answer
Hi John

Sounds to me as if the piston's insert bearings surrounding the crank shaft have deteriorated, or the piston rings have lost tension, allowing the piston to knock against the cylinder wall. Best you get a proper analysis from a qualified and reliable mechanic.

Safe Boating
Ron