Honda BF 150 overheat alarm

triumphrick

Lieutenant Commander
Joined
Jun 26, 2008
Messages
1,737
This is a new one for me. It has been difficult to diagnose this issue.

Started a month or so ago with the starboard motor. ONLY when accelerating out of the hole will I get an alarm. If I very slowly bring the boat up to speed there is a chance that it wont come on...

I checked the paperwork I recieved when I bought the boat three years ago. 2008 KeyWest 268 with a pair of BF150's. It had 280 hours on it and the seller produced a bill from his marina where the 300 hour service was done. New impellers as well as thermostats and the rest of the normal maintenance items.

The rig now has 550 hours and when this started I pulled the LU's and put in new impellers. Buttoned everything up and damned if the same thing happened.

Once on plane and at any speed, it runs great. Good pee stream and no alarms once underway.

Only when accelerating. Any ideas?

Thanks!
 

Snoopy11

Seaman Apprentice
Joined
Aug 25, 2016
Messages
42
Could it be the sensor that triggers the alarm is going bad? It happened on a 90. After changing T-stat etc it ended up being a failing sensor...
 
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