my prop shaft would rotate 350 degrees then lock up, if i backed up and rotated forward it would catch in the same spot. thinking a gear tooth was bad i pulled it apart all gears were fine but metal fragments were stuck in forward gear . So on inspection of the fragments, one piece was large enough to get some measurements. The piece was round about .375 dia-- .190 height and it was also stepped .where does it go and does someone have one? it got ground up..
The part you found is a magnet that is found in some gear cases. Look for a round counter sunk area at the bottom of the housing that is the same od as that piece. This is where is was. Leave is out, to avoid having it get caught it gears again. It was a short lived idea that Mercury tried.
yep you hit the nail right on the head about it being a magnet .looking at the metal it doesnt look like steel at the break. theres a recess of about a 3/8 dia x 1/4 deep,drilled spot in alignment with the driveshaft that, that would have been pressed into.dont need it do i ? thanks ken
I have found three lower units locked up with these magnets jamming the gears. Why would you take a chance of doing damage if left in and trusting old cement or press fit to retain in into the case? Mercury had a good idea but should have used a magnetic fill plug instead, to collect any metal particles.