Step One: 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 Two: 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 Three: 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:
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