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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Just an update here- I went ahead and ordered a pair of risers. I figured if only the port sides are getting hot then start there. Of course ordered a kit which came with 1 starboard and one port vs two port risers but I found that the post cat O2 sensor will reach even if it’s a starboard...
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    I’m guessing it’s not as hard as I am probably making it out to be. I worry I will not have the right tools, snap a bolt head off, not have a good angle to get in to extract (shoot I don’t know if I have ever extracted). I’m you tube handy but I also break things.
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Yes unfortunately it’s been salt since day 1. We bought her in August of ‘20. So you can imagine how nice it was to have an escape. I had a raw water cooled 7.4 on my last boat so got used to replacing manifold and risers on schedule but the Dry Joints have been a bit of a mystery on...
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Those look really nice!
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Sorry forgot to answer this Q - both motors core temperatures are fine- it’s just the port EMCT fault’s on the port side Manifold’s getting hot. This was the starboard that day recently
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    It may be cheaper to repower with a quicksilver carb’d 383 honestly
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Yeah I kinda figured replace exhaust when I bought her but …the CATS x 4 was a big miss!
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Pic of starboard engine- my son helping to load the genset battery. I don’t think it ever had a heat exchanger. I am 99% sure I would be able to recognize but…. I have been wrong in life hahaha. Last year the water pump bearing started to fail on this stbd engine, so I bought a complete...
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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    Hi all, I've been reading threads like this vigorously trying to figure out if I need to replace my exhaust (and potentially my CATS) -- I have a 2013 Monterey SY 340 with twin Merc 377 Mags EC - with PCM 555 control modules. SERIAL NUMBER(S): Port; 2A079834 Starboard; 2A031052 My question --...
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    Temperature Fluctuates - 2015 350 mag mpi ec

    PS - Feels like I already wrote a book but in addition to the above.. One of my catalysts is kicking a failure error on the Port engine Port Side (the same side that's getting hot). So it's pretty clear it needs to be replaced. I'm very interested to understand how people are dealing with this...
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    Temperature Fluctuates - 2015 350 mag mpi ec

    I've been reading threads like this vigorously trying to figure out if I need to replace my exhaust (and my CATS) -- I have a 2013 Monterey SY 340 with Merc 377 Mags. It's raw water cooled in salt water with CATS and the Dry Joint original exhaust. I've been getting guardian faults off an on on...
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