300 Pro XS 4 stroke Ser #2B689056..what temp does engine have to reach to sound the overheat alarm? Thanks..
300 Pro XS 4 stroke Ser #2B689056..what temp does engine have to reach to sound the overheat alarm? Thanks..
2020 Basscat Lynx..
2020 Mercury 300 Pro XS 4S..
Good question. Since there's not an "overheat alarm"- let's look at when the engine might sound a Critical Fault Warning (or enact Engine Guardian and limit your available power).
Thermostat begins to open around 130-135 degrees, and is fully open at 170 degrees (F).
Normally overheat condition would be (approximately) 15 degrees above the FULL OPEN temperature, but can vary depending on the engine's calibration data.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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I have seen 175 before on the smartcraft after coming off plane down to a idle after a hard run with no faults or buzzers..after that temp starts dropping down..Originally Posted by EuropeanAM
2020 Basscat Lynx..
2020 Mercury 300 Pro XS 4S..
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