Missing Fuse

[Darrow1!]

My 2017 R23 manual says the 7.4A Garmin chart plotter fuse is located in Dash Fuse Box #2 but it isn't. Nor can I find it in either of the other two fuse blocks. Where else could it be?

 

[JMarshallR25]

The current R23 manual shows it in Fuse Block 1 in the same third position the old version had it in dash Fuse Block 2 (see below). But assuming your boat is a 2017 and you aren't looking at the wrong manual, my first guess would be that the 7.5A fuse was simply replaced with a different size. Did you try tracing the wire from the screw terminal where the 7.5A fuse should be and determine that is not the Garmin? Next would be tracing the power back from the chartplotter itself.