I use my boat about once a month and when I put it in the water it starts right up but after we cruise around the lake and park to swim or lay out it has trouble starting back up. It usually takes me about 3-4 times trying to start it before I get it running? I usually put the throttle in 1/4 position also and it still has trouble. I'm afraid of getting stranded every time I shut it off. I'm a first year boat owner and just looking for opinions on what could be the problem. Thanks!