I should have posted my thread this way and not the 7.5 amp fuse issue because i know there is a lot of threads on that. My main question was if my dad could have possibly been running my engine to hard not knowing that I did not switch over my clutch weights to the 75g weights. He does not know enough about sleds to where he would have looked at the rpms or noticed anything. He was riding the sled with 65g weights in 1300ft of elevation. I am just wondering if that could have hurt the engine or does the sled have a rev limiter? He was also not riding fast other than pushing it a bit harder in deep powder in the ditch.