2008 Mercury 90hp optimax

Down under opti

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Feb 8, 2019
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Hi guys,
Im looking for some help.
I have a 08 merc 90 optimax which has a constant alarm. This has been diagnosed by mech as a fault on the ecu.
It is putting a negative to warning wire, im pretty sure on pin 11.
A couple of questions.
Has anyone had a repair done on their ecu/pcm before?
If i cant get this repaired and can find a second hand 115 ecu and upgrade the throttle body on my 90 is this worth the extra hp i would get and is this as easy as it sounds.
I am mechanically minded so do most things myself if it aint computer related!
Look forward to your thoughts
Cheers Clint
 
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