At first glance, nothing complicated, but if you do not know a few details, the support will break very quickly.
All Jetsurf models except Ultra sport 2018 have 3 fins, 1 central and 2 lateral. This video shows how to install them correctly.
The proportion is 50: 1, which means for every 10 liters of gasoline 95 and above, you need to add 200 grams of oil and mix well. The video shows how to do it.
After each use, especially in salt water, it is necessary that all parts of the Jetsurf are cleaned thoroughly. This video shows how to do it correctly.
It was a problem on the boards until 2017, and they often broke.