User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 5 of 5
  1. #1
    Join Date
    May 2017
    Location
    Michigan
    Posts
    5
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    2.5 Promax port side spark problem

    I Have lost spark on all three cylinders on port side of engine....I also checked ohms on terminals both blue and red wires at both switch box's.... also switch wire's with white tracers to see if that worked (no spark) can anyone tell me how to further check switch boxes or could it be ECU.....Thank's

  2. #2
    Join Date
    Sep 2017
    Location
    Ashland city tn
    Posts
    4,774
    Thanks (Given)
    226
    Thanks (Received)
    353
    Likes (Given)
    1177
    Likes (Received)
    1115
    Mentioned
    4 Post(s)
    Tagged
    1 Thread(s)
    U can swap the boxes around and see if it moves to other side

  3. #3
    Join Date
    May 2017
    Location
    Michigan
    Posts
    5
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Merc 2.5 View Post
    U can swap the boxes around and see if it moves to other side
    Thanks' that's the next move ,let you know....

  4. #4
    Join Date
    May 2017
    Location
    Michigan
    Posts
    5
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    changed wires from one box to the other all wires on switch boxs














    Changed wires from one box to the other, would not start at all...reverse back to original starts but runs starboard side only...Switch box bad ???????????

  5. #5
    Join Date
    Oct 2010
    Location
    Harrisburg,Pa
    Posts
    2,053
    Thanks (Given)
    2
    Thanks (Received)
    45
    Likes (Given)
    20
    Likes (Received)
    183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You need to switch boxes and check for spark,not try and start it. You may have 3 wet fowled plugs and that is why it would not run. Get a good spark checker or you can somehow make sure the plugs are in the boots and grounded to block, However be very careful to keep them away from in front of the spark plug holes or you could have a fire when fuel flys out of engine when cranking. First crank motor with key off,with plugs out, with a remote starter switch or jump the solenoid to crank with key off so it does NOT spark.
    Last edited by perfmarine1; 06-08-2020 at 01:35 PM.

Similar Threads

  1. Johnson V4 No Spark on port side New timer New Stator New CDI
    By spybot in forum Technical Discussion
    Replies: 20
    Last Post: 09-07-2017, 01:08 PM
  2. 300 promax- weak spark on 3 port cylinders
    By FlatSleek in forum Technical Discussion
    Replies: 4
    Last Post: 09-26-2011, 07:36 PM
  3. OMC Tech: No Spark port side cyls
    By ProdriveMS in forum Technical Discussion
    Replies: 2
    Last Post: 06-08-2009, 02:15 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Chris Carson's Marine