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    Mercrsuiser 185HP, Unkown Serial No.

    The upper diameter is 4 inches, the lower diameter is 3 inches.
  2. L

    Mercrsuiser 185HP, Unkown Serial No.

    Today I damaged the exhaust tube and bellows because of the lack of water. But the cylinders' pressure are still good. They are 140,140,140,130,130,140. How can I know the exhaust tube part No. and exhaust bellow Part No.? I have noticed the tube Part No. is 32-90949-001
  3. L

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

    I think the reason of my motor shut off in the lake was shortage of the battery's power.
  4. L

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

    I got 14.30 when motor is running at the speed of 1500rpm and even idle, it should be ok
  5. 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?
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    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...
  7. 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
  8. L

    shift issue and running with some noise from lower unit gear

    Help me please
  9. L

    shift issue and running with some noise from lower unit gear

    It is difficult to pull it out. How can I fix it?
  10. 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
  11. 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?
  12. 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
  13. L

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

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

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

    What kind of product do you suggest to apply?
  15. 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?
  16. L

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

    Can I apply Yamaha combustion chamber cleaner? How?
  17. 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...
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    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?
  19. L

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

    How?
  20. L

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

    Could you please guide me do the investigation?
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