Garmin 8612 incorrect fuel readinds

[Rick45dwyer]

I just purchased a 2021 Pursuit 326 DC with twin 8612’s. After I did an Garmin s/w update using Active Captain my fuel consumption data for my Yamaha 300’s doubled. Any guidance on how to fix this?

 

[Nuvi-Nebie]

I would try a Factory reset, please note what is deleted with each type of reset :-