bought this boat from a guy who said it had been sitting for 2 years. took it out the first two times and it ran really good except for it was a little hard to start. then the next time i took it out it was still hard to start and then it ran for 2 mins or sowhile full throttle down the lake then just bogged down a little then just quit. well the engine was hot! change the thermostat and took it back out and it did the same thing but didnt overheat. so got to look around and the fuel lines where dry rotted and were leaking so change those out. also changed the spark plugs and changed out the gas as well. still the same thing next time i took it out. hard to get started and after a 1-2 mins it would bogg down alittle and just stop running. so i took it out again and it started to do the same thing so i pumped the bulb on gas tank and and it ran but i had it at full throttle and it would just run a little over idle. i just wish i had a boat that runs might have to take it in and bite the bullet with the cost of a mechanic. is this carb issues, power pack, coil,or maybe the fuel pump and suggestions? any advice would help thanks!