Finding the Engine Model

To find the model number, look for a model number sticker on the engine.

All Honda engines model numbers start with the letter "G," such as "G100", "GX610", or "GXV160."

This is the base engine model.  The engine model and serial number should be adequate for most of your needs. 

Honda Engines use a standard model naming convention.

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.)

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.

 Engine Type Code (Variation Numbers) - Locations On Vertical Shaft Engine Models:

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 Engine Type Code (Variation Numbers) - Locations On Horizontal Shaft Engine Models:

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GXV - Vertical Shaft Models

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GX - Horizontal Shaft Models