no power

[spanishmak]

I have a 1979 200 hp johnson I finally took it out yesterday but the motor will cruise good at no wake speed but when you try to gun it nobody home it wil just bogg out and shut off,it will start right back up but I just cannot get it past idle speed.I dont have 3/8 hoses I only have 5/16 but even though it is the wrong size I dont think this is the problem OR IS IT?and what else can it be?