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BF75a loud exhaust

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  • BF75a loud exhaust

    We have a 2004 BF75a that is much louder (exhaust wise) than it should be at idle. If I hold my hand over the exhaust ports, it is quiet like a sewing machine. Is there something inside the exhaust that should block the rear output at idle but open it up when running?

  • #2
    No that is a an Exhaust relief hole and that is normal at idle. If exhaust housing inside midsection has holes corroded in it then that will make it louder. You would have to remove lower unit and see if muffler looks corroded.
    Regards
    Boats.net
    Honda Outboard Parts

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