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1988 150hp oil system

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  • 1988 150hp oil system

    The oil tank is draining into the carburator while not running. Any one have any idea why this would happen?

  • #2
    engine NOT running, either 1 or more oil pump checkvales have failed OR the oil control module has low voltage or has failed causing the transfer pump to overfill the engine oil tank.

    if this only occurs when running it may be the engine oil tank switch has failed.

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    • #3
      The oils drains from the internal tank to the bottom carb. External tank is unhooked so it is not over filling. low voltage isnt likely as it happens when battery is unhooked.

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      • #4
        battery disconnected would give low voltage

        But sounds like someone has been busy tearing that thing apart.

        Looks like check valves are a possability

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