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good question.. nope, 140 and 160...... for raw and freshwater cooled... marine motors are generally running at 175 to 180 at full operating temp... they run open loop, no 02 systems...
well, I do correct myself.. merc does have catalytic exhaust out with o2... but they have been VERY slow to come around.. mainly just in communfornia... we only have a couple in the marina so far.. I "think" those are 160's, but I'm not certain... I'd actually have to look that up tomorrow...