All Honda engine serial numbers have a 4 or 5 letter prefix followed by a 7 digit number. The first number will be your model number, the second your engine type number, and the third will be the code number. On the metal cover Stamped directly into the metal near the spark plug Tools you may need: Find Your Subaru Model Number.
Step 1: Confirm Correct Model Number
Contact Us. Chat Chat now. The model number, serial number, and specification code on a vertical engine are located on a silver decal attached to the blower housing on the side of the engine cover.