Hello everyone.<br /><br />I am very new to the boating world. Grandpa passed his NorrisCraft Mercury 90HP boat on to me a few weeks ago. <br />Sunday the better half and I went out for a afternoon of boating. after 3 or 4 hours of boating, we started heading back to the dock. I pushed the lever to 4000 rpms and traveled about 100yds when the boat stalled and became hard to start again. after severval minutes it kicked over. After another hour of slow idle 1500rpms, I was maybe 100yds from the dock and decided to try 4000rpms again I was able to travel about 30 yds when the engine stalled and refused to start after that(ended up paddling in). Any ideas on what would cause this? I have taken it to the local boat shop for basic maintance. But I would love to fix my own motor in time of need.<br /><br />James