89 340 DA - Need help identifying fuse sizes

Ky Tundra

Member
Sep 5, 2017
92
Kentucky
Boat Info
1989 Sundancer 340
Engines
Twin 454 Mercruisers with v-drives
I tracked down a bad fuse in the panel to the right side of the helm. The panel isn't labeled and I haven't removed all of the fuses in the panel yet to track down what each controls. When I do this I want to double check that each circuit has the right size fuse. There are also a couple of missing fuses. I assume they could be just unused spots because everything seems to be working, but again, just trying to double check.
Does anyone have a diagram? Is there a way to check what size each circuit should have? Any rule of thumb on wire gauge vs. fuse size?
Thanks for your help.
 

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