84 Merc Mariner 75hp hydraulic problems

tsutter

Petty Officer 2nd Class
Joined
Mar 15, 2003
Messages
144
Hello all:<br /><br />I recently had the boat out and when I was parking it against the dock, I noticed an unusually large slick of some type of oily substance. Is it possible this could be hydraulic fluid?<br /><br />The reason I ask is that since around that time, if I try to keep the motor tilted up, it will only stay up for a few minutes and then the hydraulic system seems to lose pressure and the bottom of the motor falls back down like a stone.<br /><br />Any comments or suggestions on this would be appreciated. Thanks in advance.
 

kahuna

Seaman
Joined
Jun 23, 2003
Messages
67
Re: 84 Merc Mariner 75hp hydraulic problems

Tsutter:<br /><br />Sounds like you have a leak. If you have a manual look for the fill screw, it comes right through the mounting bracket. Fill it up if your low. Make sure the manual release valve is tight. If it still leaks, you probably have a failed O-ring in the trim/tilt cylinder.
 
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