The first step in a successful restoration is to give the engine a thorough examination and inspection before beginning any disassembly. Most restorers tend to quickly start the disassembly process and fail to note the current condition and engine details. The general condition of the engine should be checked and any damage to the parts like cracks, chips, poor welds and repairs should be noted. It may be desirable to make a few photos of the "before" condition to compare to the final restored version. Keep in mind these units are very old and may have been subjected to poor operation or repairs by many previous owners during the life of the engine. Identifying the broken or missing parts at this time can clarify the overall condition of the engine. It may be possible to determine if it is still in that original "barn fresh" condition or if it has been adjusted, modified, and poorly repaired by previous owners that lacked the correct information or skill to complete the task. It is not unusual to see homemade parts used in place of the correct original ones that were lost or broken. Most of the external parts are cast iron and will crack or break easily. Take the time to closely examine all of the following areas that are shown and mentioned.
 

The serial number is stamped diagonally on the face of the outer rim of the flywheel. This is one of the first details that should be recorded. The number of 892150 on this flywheel dates the engine about May of 1939. The serial numbers began with 810000 in August of 1937 and ended with 205427-X in September of 1952.
 

Examine the flywheel for cracks where the cooling fins meet the center hub and also where the fins meet the outer rim. Rotate the flywheel while looking at the edge of the outer rim. Do this for both the inside as well as the outside of the flywheel. There may be severe dents caused by dropping or an object striking the flywheel. Flywheels could have areas that contain pits and deteriorations due to corrosion. Most flywheels will have some nicks and scratches due to normal use and wear. This is the Eisemann type flywheel. Other engines may have the Wico type that is pictured in the chapter pertaining to magneto repair. The flywheel metal was changed from aluminum to zinc with serial number 978813.
 

Check the condition of the pulley to see if it is bent, crushed, or badly rusted. It is made of sturdy sheet metal and normally can be straightened and refinished. Notice the original large heavy washer that is between the crankshaft nut and the pulley. The end of the crankshaft should extend far enough for its threads to be even or slightly beyond the nut. It is common to see a crankshaft end broken or damaged.