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  1. J

    correct timing procedure for 3.0 140?

    I have seen a lot of back and forth on how people set the timing on a 140. some say you need to tie it to a dock and some say just let it idle some say it needs to be in gear. not wure what to do. The Dwell, gap and idle speed are all fine, just want to check the timing. Run engine until its...
  2. J

    Changing PTT oil?

    Have an '88 3.0 inline 4 mercruiser, with an alpha drive. I need to change the Power trim Oil. What is the best way to completly drain the system and start from fresh and what type of oil does it take? I was told to just suck it out of the resevoir with a syphon, which I can do but there will...
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