Honda HRN216 Series Manual page 11

SERVICE INFORMATION HRN216
3. SERIAL NUMBER LOCATIONS
The frame serial number is located on the rear of the mower deck behind the engine.
The engine serial number is located on the crankcase below the fuel valve on the left-hand side of the engine.
Refer to the frame serial number or engine serial number when ordering parts and when making technical inquiries.
FRAME SERIAL NUMBER
ENGINE SERIAL NUMBER
2-2