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  1. M

    RPM's suddenly climbing boat slowing down after hard impact on waves

    Ive got a 96 bayliner 5.7L Mercruiser and its been giving me problems the last couple times I took it out. I was in the ocean and it got a little rough. This happened on two separate occasions. After going over a wave theres a hard smack when the bow comes back down. As soon as we hit the...
  2. M

    1996 5.7 2 barrel suddenly idling high with black smoke out of exhaust

    I took her out to sea yesterday and was too tired to flush the engine. Woke up to do it this morning and I noticed I had left the gas cap open and it had rained a little bit. I topped off the tank last night. While flushing it started right up, was at 800 rpms for 10-12 seconds and then the idle...
  3. M

    Help reading plugs after rejetting (5.7 v8)

    I recently rejetted my carb, the original jets were size 58 but I put in a pair of 61's due to the engine running lean. I also adjusted the float to the correct specifications and had a mechanic mess with the idle mixture screws. I did notice that one of the mixture screws is out about 3 mm...
  4. M

    Reading spark plugs (video)

    Can you guys help me read the condition of these plugs? I looked at a few comparison charts and Im not confident about my prediction. The plugs after the 30 second mark show a bit more discoloration. Thanks in advance. https://www.youtube.com/watch?v=L7Z_s_eFm30&feature=youtu.be
  5. M

    Rochester 2-gv carburetor running lean (From lake to ocean)

    I recently purchased a boat with a 5.7L mercruiser and Rochester 2-GV. It was ran at a lake at an altitude of 6800' and most likely was tuned for that. I am using it at sea level. I've taken it out once so far and I believe it is running lean. The first and only time we took it out, the...
  6. M

    1990 25hp Evinrude backfiring and dying

    Engine sat for about 1 year. I installed a carb kit and changed the plugs. It idles really well, starts pretty easily. When I give it throttle it starts backfiring quite a bit, once in a while Ill even see a flame shoot out the exhaust. Sometimes it'll die immediately after backfiring. Not...
  7. M

    1990 Evinrude 25hp propeller recommendations for 12.5' Dinghy

    So I recently bought and restored a 1990 25hp 2 stroke evinrude for my Sea Eagle Dinghy (hard plastic floor). I plan on having about 3 passengers most of the time each weighing about 155lbs. At times there will be about 5 people on the boat but not too often. Dinghy weighs about 150. I cant...
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