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Dominick
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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Need help with Mariner 90hp tilt system #g102535 we

Customer Question

need help with Mariner 90hp tilt system #g102535 we installed new pump but bleeding the system is a pain we can manually lift and lower motor by hand sometimes have to open release valve to raise all the way then we put lock on and fill resevoir put cap back on lower motor and push trim button up and down a few times but nothing happens.seems like ram wont hold motor at all.only time ram will show some signs of life is when we lift motor all the way up and manually hold it then hit trim button it does move up and down about 1/2 inch..
Submitted: 9 months ago.
Category: Boat
Customer: replied 9 months ago.
we did notice the release valve has 2 rear o rings and noticed in some manuals thier should be three
Expert:  Jeff G. replied 9 months ago.

On both trim systems used on those engines there are three O rings. If you are missing one then the unit will not work. Check inside where the manual relief valve goes for a broken O ring. Let me know what you find and we'll go from there.

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