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  1. M

    1993 Mercury 90hp impeller

    Is it reasonable to assume that the waterpump impeller is ok if the tell-tale stream is strong and constant?
  2. M

    Corroded water channel

    Hi My 1993 Mercury 90hp engine is very cold to touch and the stream from the tell-tale is cold In spite of this the overheat warning horn came on last time out after trolling and I haven't tried it since at high revs. There is a hole next to the poppet valve that shouldn't be there (photos...
  3. M

    90HP Merc 3cyl singlehanded cranking

    Having no one to assist me, I am trying to crank my engine singlehanded so that I can check my timing. Is there any connection I can make (safely) perhaps using a car jumper lead direct from the battery to assist with this? Thanks for any suggestions.
  4. M

    Flushing with muffs

    Is it feasible/safe to run on muffs with my Merc 90 tilted clear of the salt water while moored at the pontoon? Or does the boat have to be on the hard and the engine vertical to do any flushing?
  5. M

    1993 Mercury 90 poppet valve channel

    Can anybody please tell me what size and shape of hole should be where (as you can see in the picture) I have a jagged corroded aperture. I would like to try and partially close it using Devcon filler but I am not sure what size of hole to leave (if any) The first of my photos shows where my...
  6. M

    Poppet Valve Mercury 90hp

    After checking the carbs, fuel pump diaphram and fuel line bulb while trying to trace why my 1993 Mercury 90hp three cylinder two stroke was cutting out at 2500rpm, I turned my attention to the cooling system thinking that perhaps the temperature sensor was sensing an overheat situation and...
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