I was on the water yesterday and may have a problem arising. I went to move to another area and my boat acted like it was taking off kinda slow then all of a sudden it just reved up really high kinda like it jumped into nuetral. I stopped the boat and tried to take off again and it started to move fine got up to about 5 mph then it done it again. shut the boat off and checked to see if the prop was loose but it wasnt restarted boat and it didnt do it antmore the rest of the day. anyone have any ideas what could have caused this. last yr I lost a prop going across the water and had to get that replaced but no other problems since. to is a 75 johnson and it is on a 20 ft toon thx for any help or ideas.