This recall involves the following Kohler portable generator models: PRO3.7, PRO3.7E, PRO5.2, PRO5.2E, and GEN5.0 with Spec Number PA-GEN50-3003. These generators have black frame assemblies and blue fuel tanks. The PRO3.7, PRO5.2 and GEN5.0 models have manual recoil start. The PRO3.7E and PRO5.2E have both manual recoil and electric start. Only generators with serial number 4528733735 or lower, and a manufacture date prior to 06 2016, representing the months and year of manufacture, are included in this recall. Model numbers, serial numbers, spec number and manufacturing date codes are on a silver label placed on each generator on the lower black frame assemblies.