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How to access vent fitting on 3258-gctid828713

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    How to access vent fitting on 3258-gctid828713

    New owner of a '99 3258. I've had some odor issues and want to upgrade the holding tank venting. I added a 1" hose and vent to the port side. When I blow air into the new line, it blows right back out at me. I suspect the existing vent is plugged.

    I would like to replace the 3/4" vent on the starboard side but I can't figure out how to get at the back side. It is below the AC vent aft of the lower helm throttles.

    Do I need to remove the AC vent and work through that opening (blind and not very forgiving)?

    Do I need to remove the seat backs from the table seating?

    Is there some other clever way of approaching this?
    NOAH GENDA - 1999 3258 Avanti
    Wabasha, MN on the Mississippi
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