Small gas engines built before the 1990s used cast-iron cylinder sleeves and thicker piston rings that resist wear far longer than modern aluminum-bore designs. Brands like Briggs & Stratton, Kohler K ...

Your old, reliable engine has been coughing up some strange, but concerning noises. So, you call your mechanic to find out what the problem and solution are to restoring its harmonious hum. But the ...