Search results

  1. S

    Mercruiser spark knock issue

    My Dad purchased a boat in 2016 from a marina we have used and trusted for over 20 years. But this last experience has been nothing but problems. The boat is a 1988 Searay Sundancer 268 and has twin Mercruiser 3.0 motors. We have only ever had issues with the port side motor, the motor from day...
  2. S

    Continuos problems with 4cyl mercruiser i/o

    I'll try and keep this post short but we just blew a head gasket on the boats fourth #1 engine. The boat is a 26' Searay Sundancer that was repo'd and had dual 4cyl mercruiser i/o in it. Newly rebuilt engines, all new outdrives and gimbal housing/bearings. We have had zero problems with engine...
  3. S

    Water drops on cylinder 2 spark plug

    i noticed after replacing my bottom end seals and water pump that I had a water droplet on my #2 spark plug. Motor is a 1987 25hp Mercury. This seems to be a pretty common problem which is a leaking gasket in the exhaust manifold. I've ordered both and plan on changing these out on my next day...
  4. S

    Spark plug confusion

    i picked up a 1987 25hp 2 stroke Merc and it currently has Champion QL77JC4 plugs in it, online parts manuals list the Mercury part number 14103570 which through google searching brings up the NGK 2173 BUZHW-2 surface gap plug. The NGK website lists the BPZ8H-N-10 as the recommended plug, this...
  5. S

    1969 evinrude 25hp requires choke at WOT

    Been toying with this motor and I cannot figure out why I have to use the choke at WOT, motor starts up fine and idles all day. I've done quite a bit of work to it and can't figure this problem out. So far I've cleaned the carb twice, first time I didn't remove the lead plugs, second time I...
  6. S

    1969 evinrude 25hp issue

    first off, I want to say this forum is awesome. I've been tinkering with 1960-1970 era evinrudes/Johnson motors for a few years when I had 2 9.5 sportwins given to me and they run awesome now. Everything k needed was on this forum. So now to the problem im having. I picked up a 1969 evinrude...
Top