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    trim/tilt trouble

    Had problems with early eighties hydraulics on merc 90 inline.(tilt motor inside the boat)Motor became unreliable so mechanic replaced with exchange unit. Also replaced seals on both trim cylinders as the leaked. Problem now is that the engine will sink it's full travel in about five minutes...
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    power trim/tilt system query early 80's

    I have an early 80's power trim and tilt system on a merc 90. I have had to bleed the system following cylinder overhaul. There are two screws on the pump unit. I know the larger one is to fill the unit. There is a second smaller screw with a rubber washer on the top of the unit. What is this...
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    hole in exhaust plate??

    Iv'e recently purchased a 1980 mercury 90hp six in line. The plate on the left hand side with about seveteen bolts fixing it has a small patched area with what appears to be sealant or something. Iv'e ran the engine and it's not leaking anything at the moment. Would it leak water and exhaust...
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    mercury 90hp what year?

    I've just purchased a mercury blue band 6 cylinder in line. The owner told me it was a 1984. The serial number is 8054657. The boat yard were also unsure how old it is. The front part of the cowl has Mercury in red with a white border. It has "900" on the right underside of the cowl. From a pic...
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    mercury 90hp 1984 leaking trim cylinders

    I've just purchased a 90hp mercury blue band 6 in line.Both trim cylinders are leaking fluid heavily. I guess it must be the seals as the rods do not appear to be pitted. Is it a straight forward job to change the seals as only removal of the cylinders is covered in the manual?
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