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  1. L

    My boat run slowly. 120HP,2.5L,1989

    It seems that battery's short for the power. I can start the motor after I charged for 3 hours. Is it possible the alternator was bad? How can I check if the alternator is good or not?
  2. L

    My boat run slowly. 120HP,2.5L,1989

    I pulled my boat into lake this morning and run the motor with gas mixed with the sea form about 20m. Then the boat can run with 33 miles. But later it shut off and failed to get fired. So I got back my my trolling. I checked the third cylinder's pressure is still 100. Battert's voltage is...
  3. L

    shift issue and running with some noise from lower unit gear

    I have two mercruiser, I have given up the one that the third cylinder compressure is low. Now I continue working on the new boat which cylinders are good in compressures. Current the new boat does not have the issue of bellows. I will leave it if it is not necessary. Thank you
  4. L

    shift issue and running with some noise from lower unit gear

    Help me please
  5. L

    shift issue and running with some noise from lower unit gear

    It is difficult to pull it out. How can I fix it?
  6. L

    shift issue and running with some noise from lower unit gear

    Today I found the wire of the part is broken. Should I fix it? But it work as even the wire is broken
  7. L

    shift issue and running with some noise from lower unit gear

    Today I push a lot of greese through this hole, but I did not any greese. Was the greese push into gimbal bearing?
  8. L

    My boat run slowly. 120HP,2.5L,1989

    Could I do a cleaning for the carburator? I have bought a can of Sea Foam
  9. L

    My boat run slowly. 120HP,2.5L,1989

    Dangerous action. I prefer not trying doing so
  10. L

    My boat run slowly. 120HP,2.5L,1989

    What kind of product do you suggest to apply?
  11. L

    My boat run slowly. 120HP,2.5L,1989

    Hi Scott, should I drop the Yamaha combustion chamber cleaner into the cylinders through the spark plug hole? Will it damage my engine?
  12. L

    My boat run slowly. 120HP,2.5L,1989

    Can I apply Yamaha combustion chamber cleaner? How?
  13. L

    My boat run slowly. 120HP,2.5L,1989

    There is an thread to add some cleaner into cylinder and the compressures was up. Can I do so? https://forums.iboats.com/threads/mercruiser-120-2-5-compression-readings.664246/ ***†**†*%%*****†************†** OK, here's the update: I soaked all cylinders with Yamaha combustion chamber...
  14. L

    My boat run slowly. 120HP,2.5L,1989

    I did set the timing according to the following video , 13,4,2 will be fired. Really I did not know anything about dwell. Could you please explain me how to set dwell? and I went Canadian Tire store and asked for dwell and nobody knew about it. Also what is the cost rebuilt the cylinders?
  15. L

    My boat run slowly. 120HP,2.5L,1989

    How?
  16. L

    My boat run slowly. 120HP,2.5L,1989

    Could you please guide me do the investigation?
  17. L

    My boat run slowly. 120HP,2.5L,1989

    The engine fires very well with the new spark plug and the new ignition system components. I also set the correct timing. But boat still run only with the maximum speed of less than 10mph. and the third cylinder pressure is 110(cylinder is warm) and 100(cold). How can I fix the issue of slow?
  18. L

    My boat run slowly. 120HP,2.5L,1989

    I have got my new ignition tune up kit and I have also installed it. But the old one should work
  19. L

    My boat run slowly. 120HP,2.5L,1989

    So sad for the third cylinder. Its' pressure drop from 120 last year to 100 this year. What reason caused the dropping?
  20. L

    My boat run slowly. 120HP,2.5L,1989

    I have ordered the distributor tune up kit in Amazon. it will be deliveryed in Jun 30.
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