Welcome Guest - Sign Up today
Welcome Guest - Sign Up today
Store Links Mobile - Shop Now

Announcement

Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

2.3l omc died and won't start

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • 2.3l omc died and won't start

    Hi all first time posting. I have a 1990 OMC Cobra 2.3 l engine. I was on the river and I heard the engine start to loose power and over the course of 30 seconds the engine ramped down and died. I could not get the boat started again. I have been playing with it in the yard and still cannot get it started. I have replaced the battery with a marine battery as the previous owner didn't know better. I have checked the fuel pump and am getting gas. I have replaced the fuel filter with a new one with new gas. I have unhooked the gas line from the onboard tank and connected it to a can of brand new gas. I have verified spark with a screw driver in all four spark plug wires.

    I am at a loss for why it won't start.

  • #2
    When the throttle is pumped, do you see gas squirt down the carb?
    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 SeaDoo GTX
    Raw Water Pump Maintenance
    Merc Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

    Comment


    • #3
      Yes when I pump the throttle gas squirts into the carb.

      Comment


      • #4
        Originally posted by MJTurner42 View Post
        Yes when I pump the throttle gas squirts into the carb.
        Then if the gas is clean gas and not water then you have a spark issue. Pull the fuel filter and dump the contents into a baggie to see if there is anything but clean gas in it. When removing filter see if its completely full. Pull some plugs are see what they look like
        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
        07 SeaDoo GTX
        Raw Water Pump Maintenance
        Merc Adults Only
        G-Dad always said "First Liar doesn't stand a chance"

        Comment


        • #5
          I pulled the plugs. Cyclinder 1 plug was completely black with oil on threads. Cylinder 2 and 3 had oil on the spark plug threads. Cylinder 4 was clean.

          Comment


          • #6
            I would do a compression test if you found oil on the plugs
            1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - http://forums.iboats.com/forum/owner...988-rogue-2420

            Past Boats
            1970 Wooster Hellion - Merc 9.8
            2002 SeaRay 190BR - 5.0 - A1G2 - "Cheasheads in Paradise"
            1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

            What’s behind you doesn’t matter.Enzo Ferrari

            Comment


            • #7
              Cylinder 1 130
              Cylinder 2 120
              Cylinder 3 120
              Cylinder 4 170

              Comment


              • #8
                Those numbers tells me you need a rebuild or replacement, or at least head work
                94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                07 SeaDoo GTX
                Raw Water Pump Maintenance
                Merc Adults Only
                G-Dad always said "First Liar doesn't stand a chance"

                Comment


                • #9
                  Originally posted by MJTurner42 View Post
                  Cylinder 1 130
                  Cylinder 2 120
                  Cylinder 3 120
                  Cylinder 4 170
                  Cyl 1 low compression
                  Cyl 2 low compression
                  Cyl 3 low compression
                  Cyl 4, oil or water in cylinder
                  1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - http://forums.iboats.com/forum/owner...988-rogue-2420

                  Past Boats
                  1970 Wooster Hellion - Merc 9.8
                  2002 SeaRay 190BR - 5.0 - A1G2 - "Cheasheads in Paradise"
                  1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                  What’s behind you doesn’t matter.Enzo Ferrari

                  Comment


                  • #10
                    While the compression #s are off , did any water or any other fluid come out of the cylinders after the plugs were removed? There is enough compression for the engine to start.
                    Check the timing belt to be sure it did not jump a few teeth. There are timing marks on the sprockets that line up with marks on the engine.
                    1980 Donzi 18'. 2+3 6.2 MPI Alpha 1

                    Comment


                    • #11
                      When we checked the compression clear fluid came out of cylinder #4. My buddy said it was gas but it seemed like a lot. It flew about two feet into the air I'm wondering if it wasn't water....

                      We just replaced the timing belt yesterday. It was one tooth off and we fixed that.

                      Still no luck getting the engine to fire even after fixing the timing belt

                      Comment


                      • #12
                        Pull plug 4 again and see what's in it, then check for spark at all cylinders
                        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                        07 SeaDoo GTX
                        Raw Water Pump Maintenance
                        Merc Adults Only
                        G-Dad always said "First Liar doesn't stand a chance"

                        Comment


                        • #13
                          It appears that you may have a leaking manifold. Once spark plugs are water fouled they are toast. Pull the manifold, flush out the engine and load the cylinders with oil and spin it over to keep rust from building up. Order a new manifold. Hopefully it is not a cylinder head or block problem.
                          1980 Donzi 18'. 2+3 6.2 MPI Alpha 1

                          Comment


                          • #14
                            Sign up today
                            Just rebuilt the carb and that was a waste of time. Still no luck turning the motor over. I'm going to bring it to a shop. Any recommendations in CT?

                            Comment

                            Working...
                            X