My 8.1s Horizon Merc sporadically slips to limp home mode. Any one having similar issues? Trying to correct.

jhk

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Mar 19, 2021
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34364
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Any body solve for a similar issue. So it seems to activate at higher rpm. Never occurs at lower rpm. Usually 28 and up.
 
Are you getting any alarms with it?
Maybe a sensor issue like a bad temperature senor.
 
Yes there are some beeps. The boats in storage presently. It will be back in the water in three weeks. Then the hunt begins for faulty issues. I’m new to this. As such I’m learning my way around the engine and standing items to identify ie faulty circuitry.
 
JHK, welcome to BE. This sounds like a vaguely familiar issue that I've seen here, or elsewhere. You might try doing a search within BE to see if anything comes up.
 
 
Good find, Get! That's the one I was remembering. Either something bad is happening and "limp home mode" keeps you from making things worse, or their something faulty happening with the sensor to make it think it needs to limp home. Good advice on wiring, always.
 
My mechanic
Can you get hold of a rinda scan tool? Not sure how else you would be able to determine why the engines are dropping to safe mode. There used to be some shops in my area that rented them.

Something like this. https://www.rinda.com/rindashop/shop/techmate-pro/techmate-pro-94706
My mechanic has a scan tool. So I am looking forward to his feed back. Thanks for your input. Lots of good ideas about plausible culprits. I’ll update when there’s real info to share.
 
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