mariner tilt and trim pump leak

[delprof]

My 50hp '89 Mariner has a leak from the side of trim pump--fluid comes out of small hole on side of pump(near bottom on right side)---power trim quit working, was out of fluid--I put small amount back in to see if I could find problem--squirts out in larger amounts when I remove pressure and lift foot. Any suggestions?

 

[50hpfloater]

Re: mariner tilt and trim pump leak

I have the same problem with my 50 hp Merc on a 88 pontoon. Problem started with an underwater stump. My guess is that a pressure relief got unseated after 20 years of no action and now refuses to re-seat. Engine # 6222927 with hyd unit # 92975A24.<br /> I've had the control valve assy apart several times and can't find the problem.<br /> Hope someone on here can help you. I'll be watching for answer. Maybe someone has an exploded view of valve assy that will help us both.