mercruiser 4.3 ignition

Discussion in 'Gas Engines' started by Rubenster619, Apr 28, 2019.

  1. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    I have a 4.3 alpha one mercruiser. My ignition amplifier went out. Can i swap my whole distributor to a regular automotive one and still run the same?
     
  2. gonzo
    Joined: Aug 2002
    Posts: 13,287
    Likes: 323, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    No, because of safety issues. Automotive distributors are not spark protected. A new part will cost less and be simpler. What is the year and what is it doing?
     
  3. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    Ok i still have distrubutor with sencor can i only use a regular ignition module to control it
     
  4. gonzo
    Joined: Aug 2002
    Posts: 13,287
    Likes: 323, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    What year and model is it?
     
  5. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    The boat is a 91 larson the engine is a gmc 4.3 mercruiser alpha one
     
  6. gonzo
    Joined: Aug 2002
    Posts: 13,287
    Likes: 323, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    So that is the one with the small coil and two plugs into the side of the distributor.
     
  7. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    Yes can i install that one instead of the iv thunder bolt ignition amplifier
     
  8. gonzo
    Joined: Aug 2002
    Posts: 13,287
    Likes: 323, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Can you take a photo of your ignition system?
     
  9. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    Screenshot_2019-05-07-05-27-02.jpg

    This is the problem i just wanna double check if i can replace that with a regular one from a normal gmc engine instead of this and keep my originial coil and distributor that belong to tge boat and have no problems
     
  10. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    It cranks but wont start and i live this is the issue
     
  11. Rubenster619
    Joined: Apr 2019
    Posts: 7
    Likes: 0, Points: 1
    Location: San diego

    Rubenster619 Junior Member

    so do u think is it possible
     

  12. 7228sedan
    Joined: Nov 2009
    Posts: 314
    Likes: 6, Points: 18, Legacy Rep: 60
    Location: New Jersey USA

    7228sedan Senior Member

    Did you run through the Mercruiser ignition diagnostic checklist? How did you confirm that the module is bad?
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.