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Old 06-03-2021, 02:06 PM   #1
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Default Gardian mode 5.7 merc 2700 scr

Guardian mode, motor 5.7 mercury boat won’t go over 9 mph, 3000 rpm and won’t plain off. She idols great, tried sea foam and fuel stabilizer. Changed fuel filter, Put an engine reader and it says it’s in guardian Mode. Going to top off the fuel tomorrow. The codes say Guardian stat 1, tps .22-0.90v idle, fuel=38x43psi map=2-15psi, spark advance 17.2 deg, block pressure 40psi, fuel pressure 2.1, fuel flow rate 0.92 gph, IAC Duty cycle 99.9,spark advance 1:.: deg. Trim sensor circuit high,lake/sea temp circuit high,steering position circuit low,fuel level circuit high,pilot pressure (boar speed sensor)low, any help would be great, so bummed to start the season like this. Thank you 🙏🏻
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Old 06-03-2021, 02:33 PM   #2
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Have you looked up these codes in the Mercruiser manual to se what it suggests as the fix? You can also send this information to Mercruiser help site to see what they say.
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Old 06-03-2021, 03:43 PM   #3
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Default I’ll get in that now

Merc cruiser website 👍🏼🙏🏻
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2700 scr, 3000 rpm, guardian mode

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