Popping noise when use trim

jdhaygood

Recruit
Joined
Aug 17, 2021
Messages
4
Mercury 2021 150 Pro XS

There is no grease fitting on trim tube.

What causes this noise?
 

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jdhaygood

Recruit
Joined
Aug 17, 2021
Messages
4
no grease fitting on either.
strange that I can put in and run the boat for a while and the noise stops, then the boat sits for about 2 weeks and the noise will start when trimming in the garage.
 

alldodge

Supreme Mariner
Joined
Mar 8, 2009
Messages
34,014
Agree, no grease fitting
Guess Merc figures it doesn't need them. The bearings are hanging and the pop is when it releases.
 

Grub54891

Rear Admiral
Joined
Jun 17, 2012
Messages
4,957
no grease fitting on either.
strange that I can put in and run the boat for a while and the noise stops, then the boat sits for about 2 weeks and the noise will start when trimming in the garage.
Because the bushings get lubed by the water. My brother in law would dip his fishing reel in the drink if it squeaked. It worked till he got home and cleaned/lubed it up later.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
13,062
Guessing Delrin or nylon 6 bushings.
No lubrication required.
Will “chatter” until broken in
 
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