255360-00 Gasket, pump attaching. Used on the 3400 series Hercules Gas and Diesel engines. 10100 so if that's the case

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

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

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

This part is very similar to hoses used in other "Hercules" applications that used the 2300 engine

This switch has been updated to part number MM-2C-12F/AT and is physically different

255360-00 Gasket, pump attaching. Used on the 3400 series Hercules Gas and Diesel engines. 10100 so if that's the case255360 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.