255360-00 Gasket, pump attaching. Used on the 3400 series Hercules Gas and Diesel engines. 10100 Internal diameter of long end

Internal diameter of long end will be 1 1/2" inches

2 and 3 cylinder engines up to 3000 rpm and  was used with kit code NN

Please notice the terminal strips on the right and left hand sides

this is a must if converting a WYE configured generator to 3 phase delta

so if that's the case for you just order this one manual

255360-00 Gasket, pump attaching. Used on the 3400 series Hercules Gas and Diesel engines. 10100 Internal diameter of long end255360 00 Gasket, water pump mounting attaching. Used on the Hercules 3400 series industrial engines. This gasket is used on the water pump as the mounting attaching gasket. This will be item number 3 in the Hercules drawing.