How to find Honda Engine Model Number
Step 1: Finding your Model number.
To find the model number look for a model number sticker on the engine (See Below). All Honda engine model numbers start with the letter “G”, such as “G100”, “GX610”, or “GXV160”/ This the base engine model.
Step 2: Finding the Engine type code
The engine type code is stamped into the side of the engine, usually close to the serial number. Engine type codes may be up to 4 characters. IF a code is less than 4 characters, you may see asterisks as placeholders (i.e. an engine stamped with QX** is a QX type engine.)
Step 3: Finding the Engine Serial Number
The engine serial number is stamped into the side of the engine. All Honda engine serial numbers have a 4 or 5 letter prefix followed by a 7 digit number.
For more information on where to locate these numbers, refer to the following diagram: