Braid around thrust washer and prop shaft

[MattMigues]

So Thursday I received a new prop I ordered a 12p and hit rev limiter at 3/4 throttle so sent back and got 14p had basically loaded boat with just me I was running 5550 WOT perfect then a buddy called to see if I was catching I picked him up at launch and couldn't turn over 5100 he's about 175lb guy. I was discouraged so yesterday I pulled prop off and there was a huge wad of braid wrapped around from side of thrust washer and prop shaft, seal was fine. I hadn't had a chance to run it again but anyone thinks that would affect performance or it's the added 175lbs cut me down 400rpms?