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  1. R

    twin disc mg 5050 oil change

    High Pitched Whining Hi SailorPete, I have a 1996 Nordic Tug with Twin Disc MG-506-1 which is at 1700 Hrs. Four 4 weeks ago it started to make a whining sound that lasted about 3-4 seconds after shifting from forward to neutral. Seems to be the same symptom that you experienced. Have you...
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