Intermittent Pro-Tec issue

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  • eklock
    • Jul 2005
    • 8

    • California


    Intermittent Pro-Tec issue

    '91 SN, 330 hrs, 240 HP 5.8 w/Pro-Tec, original owner.

    The boat ran Saturday just as it has for the past 14 years, perfectly. Sunday morning my wife backed it off the trailer and pulled out to the buoy line while I parked the truck. When I got back to the dock where she would normally pick me up, she just yelled to me that motor wouldn't start.

    I hitched a ride over to her and began checking things out only to find nothing wrong or out of the ordinary. All the gauges displayed normal readings, all the accessories worked. I couldn't find any loose or disconected wires anywhere. The battery terminals were clean and tight. I checked for fuel, the float levels looked properly adjusted, and fuel was pumping from the booster nozzles on the carb.

    Before throwing out a tow rope I thought I'd turn the key one more time and SHAZAM she fired up like nothing had ever happened. The boat ran great all day. Starting, stopping, idling, no problems what so ever for the next 7 hours. While I was retrieving the trailer the morning symptoms occurred again, leaving my wife stranded at the buoy line but only for a short period of time. She did nothing but wait 5-10 minutes and then it started up again like normal.

    Last night I practically went blind sifting through ~1400 posts between Planet Nautique and Correct Craft Fan only to find that my Pro-Tec ECM might be failing me. Is this system really that unreliable? 330 hours doesn't seem like a good service life for a system that was held in such high regard at the time of purchase. Does anybody have any advice on diagnosing the Pro-Tec system so that I can be sure this is actually causing the problem? Intermittent problems are the worst and if this system is prone to failure I guess I'll be forced to put a distibutor-type system on it, MSD or Mallory I suppose.

    The nearest CC or PCM dealer is 200 miles away from me, so these message booards are my best hope for fixing this problem before I start throwing money at it.
  • surroundsound64
    1,000 Post Club Member
    • Jul 2005
    • 2147

    • Longview, TX

    • 2018 230 1981 Ski Nautique

    #2
    RE: Intermittent Pro-Tec issue

    Your right, intermitent problems are very tough... unfortunately I don't know much about the pro tech.

    Will the engine even turn over when the problem is occuring?
    2018 SAN 230
    1981 Ski Nautique
    Sold - 2011 Sport 200V
    Sold - 2000 SAN

    Comment

    • eklock
      • Jul 2005
      • 8

      • California


      #3
      RE: Intermittent Pro-Tec issue

      Yes, it cranks over fine but has no spark.

      Comment

      • DavidF
        Senior Member of PLANETNAUTIQUE
        • Sep 2004
        • 611

        • Austin, TX


        #4
        RE: Intermittent Pro-Tec issue

        It could be a bad electrical connection (especially the grounds). Unplug all Pro Tec related electrical plugs/connections and clean them up before applying silicon grease and reconnecting. Retest.

        Comment

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