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ECU/PCM submerged - not working - repair?
Hi,
I have bought a Mercury 40 hp 4-stroke that was fully submerged in brackish water for about 12-24 hours. Depth was around 3-5 meter.
The outboard was brought to a dealer for cleaning immediately after it was raised above the water.
According to the dealer, the PCM/ECU needs to be replaced.
Would it be possible to check and repair this PCM/ECU?
Thanks
/Martin
Askeladden 635 Freestyle
Mercury Verado 300
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Mercury 3L/4 Stroke/Verado Moderator
I would recommend you simply replace it. Odds for longevity (even if it could be repaired) are very low.