Cutting /Replacing Deck boards in place

I an staining a deck that has one one cedar board that must have had a knot at the wrong place. It has started to rot at that one spot, but the rest of the board (and deck) is in great shape.
I am looking for options about how to do this and make it look neat. My though was to plung cut with a circular saw to get it started and then finish with a sawzall.
And to make the cut at the edge of the joist and not in the middle. The reason being that exiting nails right in the center of joist and if I remove them and then run in new screws to angled in that I would have a chewed up board end that be a good place for rot to start.
Instead I am leaving that board whole over the joist and then putting on a short section of scab joist to catch the edge of the new board.
But in a mont I have another deck to do. That one needs lots of boards replaced. Most of them are from damage/stains where they feed birds.
But some of other boards are where they have been spliced over joist and the ends are starting to go bad.
Looking or better ideas to do this where I have a large number of boards to replace.
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
Replies
A MultiMaster would make that plunge cut quickly and cleanly.
But if you've got a lot of boards to replace, you might want to persuade the client into re-decking the whole thing. Eliminate the rotting problems by using one of the composite deckings, or Ipe.
More expensive in the short run, but better long term.
Hey Bill,
Get a piece of 2X(about 12 to18 ins. long) as wide or wider than the board needing repair, put a bevel on it(use a sliding compound or your circ.saw with a guide), 45*is good30*works good too.
Cut out the area needing repair(or about32-48in), use a jig saw,cut flush to the inside of the joists,(option reset saw to whatever bevel chosen and rough- cut cut.)
Take the beveled board, screw it to the deck so it can be used as a guide for using a sharp chisel and hammer to clean up the cut.
Longer to explain than to do.
Good Luck
DAVE