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1988 OMC 4.3 Oil Cooler Part Number

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  • 1988 OMC 4.3 Oil Cooler Part Number

    Just boat the boat. Noticed water in power steering reservoir. Just going to drain and replace oil cooler as that seems to be the usual culprit for this. Anyone have the correct part number? Is it 983849? Thank you. Any tips or suggestions on this replacement? I don't know a whole lot about OMC's, but this shouldn't be that big of a deal to swap. Thank you.

  • #2
    Just going to drain and replace oil cooler as that seems to be the usual culprit for this.
    Ayuh,.... Why not pull it, pressure test it, 'n solder the leak closed,...

    Not alota differences in P/S coolers,...

    3/8" oil lines, 'n I believe 1" water lines,...


    • #3
      The OMC part # says NLA, but Volvo used a similar cooler, I think same size hoses (3/4" ID), see part # 17 here, $217, but I'd do as Bondo said, see if you can get yours repaired and pressure tested. Not much to those coolers. And once fixed or replaced make sure to always drain that water hose when you winterize.

      1988 Four Winns 200 Horizon
      4.3 OMC Cobra

      98 Jeep Grand Cherokee 4.0 Selectrac
      07 Jeep Grand Cherokee Limited 5.7 Quadradrive II

      "While air doesn't freeze....rust never sleeps"


      • #4
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        any radiator shop will charge $35 to repair by doing exactly what Bondo stated.

        your oil cooler is nothing more than a bundle of 1/4" copper tubing within a 2" copper tube with some stamped copper tube sheets....and a bit of soldering or brazing from the factory.
        Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

        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 - "Cheeseheads in Paradise"
        1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

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