In England. The river running thru London. Is so constantly filled with all the drugs used by Londoners. IS causing the animals to not be able to sexually reproduce. From London to the ocean.
Humans...The perfect GREEN animal.
Do you check several motor parts for wearing out ? Like correct sparkplugs and readjusting the gap if out of specification ? Had the injectors checked out for correct flow rates ?
The engine is way too small for that boat. Need to remove the prop to get the information stamped into it.
Then call the www.propgods.com Ask for Ken. He knows boats & prop combinations very well.
Burrs or hit marks on the male or female splines ? At the 3/4 inch point ? Piece of grit wedged into a spline at that point ?
I would not loose sleep on it.