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Name:   houseboat - Email Member
Subject:   90 mercury alarm
Date:   7/24/2009 11:04:21 PM

A friend just returned his houseboat with a 2000 90 hp Mercury to the water today after being in my shop for roof repair for 5 months. After running about a mile the alarm came on and he shut the engine down. Fortunately someone came by and pulled him the rest of the way to the marina. The oil injector tank was almost full. Can someone tell me why the alarm was on and has he done any damage to the engine if he ran it a few minutes?

Name:   Procraft176 - Email Member
Subject:   90 mercury alarm
Date:   7/25/2009 12:45:43 PM

The newer model two stroke merc 90's will not sound the alarm if motor is not getting oil. It sounds the alarm when there is a low oil level condition in the tank. Could be possible the low level switch in the tank is stuck closed. Also the alarm will sound when the engine overheats. Check to see if the water pump is pumping water out of the side of motor. If not, you need new water pump installed. Keep your hooks wet..... KW

Name:   houseboat - Email Member
Subject:   90 mercury alarm
Date:   7/25/2009 1:43:24 PM

Thanks, I will forward this information to my friend with the houseboat. I wondered if it has something to do with it not running for 5 months.

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