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1989 Mercruiser 3.7L Thermostat question?


1989 Mercruiser 3.7L Thermostat question? My twin engine Carver runs about 120 130 degrees. Boat ran great all summer, I believe the previous owner (I just bought at beginning of year) has removed the thermostats. Should I replace them with original 160 degree ones or leave as is?

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