I used to think electric knives were for people who didn’t know how to sharpen a fillet knife. That’s probably right, but experience taught me that, just as carpenters work more efficiently with power tools, for some fish-cleaning chores, a power-knife is more efficient.

I have plenty of experience. I learned how hard on the sharpness of the serrated blades of an electric knife that filleting multiple dozens of walleyes could be. It makes sense. Fillet knives are made to cut fish meat, and if they are only cutting meat, their sharpness will last a long time. It’s possible to cut through the rib bones of most fish with a regular fillet knife, but doing so quickly dulls them. Touching them up with a hone or sharpening steel after every two or three fish can keep them sharp.

That can’t be done with the serrated blades on electric fillet knives. Eventually, those blades get dull.

I researched the possibility of sharpening dull, serrated blades by interviewing knife sharpening experts as well as the makers of knife sharpening tools. I learned that the steel used to make electric knife blades is extra hard and requires special tools and equipment to sharpen when they are manufactured. Resharpening to “like new” can’t be done by hand using sharpening stones or files. Extra-hard steel or not, by the end of a couple of walleye filleting sessions, the strong motor on my Rapala R12 rechargeable knife was doing more of the work than the sharp blades.

The next time I used my electric knife was closer to home, when a large lake trout was caught. The walleye-dulled blades sliced easily through the trout’s skin and down to the spine, but when I rotated the knife 90 degrees to cut through the ribs, towards the tail, it wouldn’t cut through the “large gauge wires” of which laker ribs are seemingly made. No way, no how!

When I remembered the workout I’d given these blades, not only on walleyes at that last outing, but other fish, on other days previously, it was easy to deduce that the blades were just plain dull.

I finished the lake trout that day by switching the 7.5-inch blade to the 6-inch blade that came with my R12 kit. This blade set is just as stout and sharp—just shorter for filleting smaller fish. Not quite the perfect tool for the job, but it worked.

Later, I shopped for a replacement set of blades for my power-knife. I found that Rapala (as do most other electric knife makers) offers several other sizes and styles of blades that fit their handles, beyond the one or two that come with each knife. Most are longer or shorter, but some are thinner and/or more flexible for filleting various sizes of fish, or various species.

I ordered a couple more of the 7.5-inch blades (my favorite) and a collection of the other sizes. I want to be prepared for the next time I’m put in the role of “fish butcher” whenever that happens, or whatever kind of fish are on the chopping block.

For more insight and tips on how to make the most of your fishing harvest, check out the articles in MidWest Outdoors, available by subscribing on our website.