Warning horn on 1996 Mercury outboard 225 hp motor beeps continuously.

by Gene S.
(Merrimac, MA)

Hello, Been having an on-going issue with my boat motor that nobody can seem to resolve. Motor is a Mercury 1996 225 hp outboard that has keeps having an issue with the warning horn. Comes on and beeps continuously indicating that it's some sort of cooling issue. Have swapped out many parts including thermometer, water hoses, sensors, new compute, it's been flushed out still cannot resolve it. If anyone has any ideas or has seen this before it would be appreciated.

Thank you
Gene S.

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