The Devils turned in a sound all-round performance with recent signing Brady Kurtz, skipper Kyle Newman and reserve Stefan Nielsen all scoring 11 points, while Sam Simota and Todd Kurtz contributed eight each.
Team manager Lee Trigger said: “It was good that all the team were scoring points. Even reserve Ellis Perks avoided any last places and finished with paid four points from his three rides.
“We continued our unbeaten home league record and took another three points. Now we have to start picking up some points away from home, starting with Tuesday’s visit to Peterborough.”
Plymouth operated rider replacement for Jack Holder, who was competing in the World Under-21 event at King’s Lynn, while Edinburgh relied heavily on Kevin Wolbert and Sam Masters, who scored 27 of their 41 points.
Plymouth: Brady Kurtz 11+1 (5 rides), rider replacement for Jack Holder, Sam Simota 8+3 (6), Todd Kurtz 8+1 (5), Kyle Newman 11 (6). Reserves: Stefan Nielsen 11+2 (5), Ellis Perks 3+1 (3).
Edinburgh: Sam Masters 11 (5), Mark Riss 1 (4), Michael Palm Toft 1 (4), Ryan Fisher 7 (4), Kevin Wolbert 16+1 (5). Reserves: Luke Chessell 2+1 (3), Dan Bewley 3 (5).