how to add gear oil and engine oil for 4hp outboard

Hello, for a new machine, we have added gear oil to the gearbox. If you need to replace it, we recommend replacing it every six months. There are no specific standards for gearbox oil at the moment, and general gear oil is commonly used. Below is a video for replacement:

You can refer to the video here: 

As for the engine oil of the machine, generally, 200ml of 4-stroke motorcycle engine oil is sufficient. To replace it, simply drain and refill it at the oil inlet/outlet ports.