To determine the correct crankshaft size, you will need to identify the model number of your Snapper mower and the model number of the Honda engine you plan to install. Once you have this information, you can refer to the engine specifications provided by Honda to determine the correct crankshaft size.
For example, if you have a Snapper riding mower model number 28173E and you plan to install a Honda GX240 engine, the correct crankshaft size would be 19mm. However, it's important to note that this information is just an example and the actual crankshaft size may vary depending on your specific models.
To ensure you select the correct crankshaft size, it is always recommended to consult with a qualified mechanic or an authorized Snapper or Honda dealer. They can provide you with the exact specifications and guidance you need to successfully complete the engine replacement.