2 weeks ago
If the motor lowers and bounces while making a noise or noises, lube the tilt tube pivot fittings and tighten the tilt tube nut on the stb. side 1 flat (1/6 turn) at a time until the bouncing stops.
If it goes down smoothly but makes a groaning or grinding sound, the upper mounting pin and bushings may be dry or corroded. In that case, sometimes a penetrating oil may give temporary relief but it is best to prop up the motor and remove the pin, clean and grease everything, and re-assemble.