Recent content by Theoutdoorsman

  1. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    Fluid level is good. I still see air in the fluid if I crack the the fill screw loose. Maybe it's just gonna take time to work it's way out?
  2. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    What bypass valve are you referring to?
  3. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    I should add, there is zero scarring on the cylinder walls.
  4. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    Tilt cylinder seals replaced. All of them. Still slowly losing pressure. I'm stumped!
  5. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    This system is totally sealed. It has never leaked a drop, and never seen salt water. If you had to guess, which seal in the tilt cylinder would you suspect has failed that would cause these symptoms? Curious if there is a common seal failure point that may be suspect.
  6. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    Amazon has a seal kit for the system. It's cheap enough, but I'm not sure I'll go that route. Pretty sure there's a company out of Florida called 5-Star that sells a seal kit comparable to OEM. I'd have to research more to find a part number on the kit I need. The serial number on the outboard...
  7. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    How do you remove the pressure relief screw to inspect the seals on it? Figured I'd start there before tearing into the cylinder itself. I can see a "C-clip" around the head of it. Not sure if that must be removed before it can be taken out.
  8. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    Ok .... I removed the fill cap and, to my surprise, the system was full of fluid. Really was thinking it'd be a little low causing the slow fall at full tilt. The outboard trims up/ down just fine. It just won't hold it where I stop it. I'm thinking a bad internal seal? Any ideas?
  9. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    Also, can I use the tilt n trim fluid at the local wally world in this system, or?
  10. Theoutdoorsman

    1996 Mercury 150 EFI - Tilt cylinder not holding pressure.

    When I tilt the outboard all the way up (or any height above full trim) the tilt cylinder will not hold the outboards weight. It will slowly fall until it meets the trim cylinders, at which point it will hold. I need to check the fluid level to rule that out. Is this the fill screw for the...
  11. Theoutdoorsman

    1996 Mercury 150hp EFI --- Need an OEM Service and Parts Manual

    So there's not a model specific manual for it? I see the "Above 135HP (Non Verado)" manual. I'm assuming that covers every outboard greater than 135hp, and multiple years. How big "is" this book?!?
  12. Theoutdoorsman

    1996 Mercury 150hp EFI --- Need an OEM Service and Parts Manual

    Can anyone help me locate an OEM Service Manual, and a Parts Manual, for my 1996 Mercury 150hp EFI? (Serial Number 0G424278) I was hoping to find a motor specific manual instead of the manuals that cover multiple outboards, if one exists. Thanks in advance for any and all assistance. Much...
  13. Theoutdoorsman

    Force 70 hp questions.

    Thank you!
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