Basically I was running pretty close to full throttle and the motor kinda kicked up and started revving and the boat started slowing down, I backed off the throttle and it was running fine, I throttle up a little and it started doing it again. I was looking back when it happened this time, motor kicked up like I had hit something. The engine itself never missed a beat. I kept going at prob half throttle and I made it back to launch. After a few minutes I got back in and was gonna load onto trailer, so I made a little run up the river at full throttle and it never done it again, so I loaded and pulled out of water. The prop was not damaged and I could not see anything out of the ordinary. When I got home I was thinking something in the gears so I drained the oil from lower unit, it was fine, no water. I was attempting to remove the "prop housing", the bottom housing the hold the gears. Lol Could not get the bolts out, that's when I pulled the prop off and found the line wrapped around the shaft. The prop doesn't look like it has a pressed in hub after I cleaned it up, I am not totally incompetent at mechanics , with that said I can't see how it would spin with that shear pin going thru everything unless something on the inside was spinning loose. Here are pictures of what I am seeing. Keep in mind I never noticed what the parts behind the prop looked like before this happened so I can't find any differences in what it looks like now. Hope this made some sense.