Hi Adam here and I have a tip for you.  How long should engine coolant last?  Engine coolant should last about five years.  However, it should be tested to be sure it is still protecting your engine(s).  Use an antifreeze tester, or a refractometer.  The antifreeze should be good down to -32 degrees fahrenheit.

Its also smart to test the coolants rust inhibitor level.  You can get test strips from marine engine suppliers that do this for you.  Just follow the directions that come with the test strip.

So the days are getting longer and soon the sun will be warming the water and the air.  Spring is not that far off.  Until next time, mate.

Adam Wells

Certified Marine Mechanic

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