Moisture!

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  • functionoverfashion
    Senior Member of PLANETNAUTIQUE
    • Jun 2017
    • 509

    • New Hampshire

    • 2003 SANTE

    Moisture!

    I keep my 2003 SAN in the water all the time. Clearly I can't complain about this, but it does have downsides, one being the boat's electrical and fuel systems are near a plentiful source of moisture all the time. Of course I keep it covered, and during weeks like we're having now in New Hampshire where it's very tropical and raining on/off constantly, I have a full trailer-type cinch cover OVER the other cover, so it really does stay pretty dry inside the boat.

    We used it last Friday and Saturday, and both times it ran great as it has since I got it about a year and nearly 200 hours ago. But last night, it ran like crap. It started fine, idled fine, but struggled under load. It didn't want to plane, and then sounded like it wasn't running on all cylinders. I had to give it much more throttle than usual. However, if you backed off the throttle, it would run more or less fine at lower RPM. You could even rev it in neutral and it would rev up OK, although I can't say for sure it was firing on all cylinders. It wasn't stumbling, though, in neutral.

    I thought, Oh I'll check for loose plug wires just for kicks. But I couldn't, because I couldn't reach down there with the dividers next to the engine and with the exhaust being hot. And I couldn't check the distributor cap because I didn't have a torx bit on the boat. So, I gave up and covered the boat back at the dock.

    When I go back, I'll also drain some fuel from the FCC to see if there's any water. And I'll look at the distributor cap, and check all the plug wires to be sure they're snug on both ends (I did check the cap end). What else should I have a look at? I am hoping there's either water in the fuel filter housing, or moisture in the distributor cap thanks to the horrendously wet weather we've been having for nearly a week.

    Since I don't have service records with the boat, I may just do a cap/rotor anyway so I know when it's been done - that is, unless it looks perfect under there. If there's no water and no corrosion and it still runs like crap, maybe spark plugs, and wires, again just to establish a baseline; here's hoping it's simple.

    Engine is the Excalibur with v-belts. Not that the belts matter, but just... it's one of those. Approximately 650 hours overall.
  • homer12
    Senior Member of PLANETNAUTIQUE
    • Feb 2016
    • 584

    • Indianapolis, IN

    • 2004 SV211 TE

    #2
    Have you changed your fuel filters in those 200 hours? That might be another place to check as well


    Sent from my iPhone using PLT Nautique

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    • Infinity
      Senior Member of PLANETNAUTIQUE
      • Sep 2017
      • 730

      • Lake Norman - Denver, NC

      • 2014 SV244 w/ ZR409

      #3
      x2 on fuel filters...you likely have an inline filter, not sure if older boat has FCC, but those can get nasty in 1 season

      Comment

      • functionoverfashion
        Senior Member of PLANETNAUTIQUE
        • Jun 2017
        • 509

        • New Hampshire

        • 2003 SANTE

        #4
        I did change the fuel filter at the beginning of this season, but I was planning to check the FCC for water anyway. Until I found the source on Friday.

        The distributor cap was crusty underneath. I sanded down the contact points as it was late Friday night before I had time to mess with it. I grabbed a new cap & rotor on Saturday and it ran perfectly all weekend. I guess the added moisture from last week was JUST enough to either add to the corrosion, or else the engine didn't like the super damp air combined with a poor connection in there. Anyway, problem solved! I should have just done that when I bought the boat, not knowing the age of it. But it was no big deal in the end.

        Cheers!



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