Fuel Tester, measures alcohol content

Fuel Tester. Tests quality of fuel by measuring alcohol content. Replaces Mercury 91-879172T28, and Mallory 9-79816. Premium Quality For Longer Life. Meets or exceeds manufacturer's recommended specifications. Backed by Sierra's limited lifetime warranty. Tests quality of fuel by measuring alcohol content Replaces Mercury 91-879172T28, and Mallory 9-79816 Premium Quality For Longer Life Meets or exceeds manufacturer's recommended specifications Backed by Sierra's limited lifetime warranty