My new to me 2018 Mercury 150 four stroke makes a creaking/ popping sound when I raise and lower the motor. I can’t seem to isolate the sound, but I think it might be coming from the power trim hydraulic ram. That being said, I can’t find a single grease zerk on the thing. The parts diagram shows it to have one, but doesn’t show where it goes. It does seem to leak a bit of fluid out the ram.
Q1: where/how do I lubricate the hinge
Q2: Any ideas on the problem or remedy for the creaking/popping
On an older mercury mine creaking and popping was coming from the main cylinder pins , they go into fiber bushings . You may have a cover on each side with 2 bolts holding it on. You can try wd40 .
No grease fittings on mine.
Mine was only in fresh water.
And i did burn up the trim pump motor using it while it was creaking and popping.
I wound up pulling off one side bracket at a time with motor suspened sanding cylinder pin cleaning bushing and drowning it in marine grease , put it back and bolt it back to boat then done the other side.
It is a trunion cylinder on mine so the pins are made onto the cylinder
on mine i could drive the pin out .
Its a Pain!
If its the pin and bushing sticking
Pay someone to do it !
The slide plates are Hard to get off that pin.
Hopefully you just have some air in the lines and you are hearing that noise.
