Appleby, the first-round leader, got hot down the stretch, birdying the last three holes for a 4-under 66 to pull into a tie with Maruyama, who posted his second consecutive 5-under 65 at Waialae Country Club.
The event was put behind schedule after heavy rain washed out Thursday's first round.
PGA officials said they hope to play 36 holes Sunday to complete both the third and fourth rounds.
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