About 2 trips ago my 15hp Tohatsu 2 stroke which normally runs like a top started too stall at full throttle. It felt like it was getting starved of gas. It would start right back up and run a while and once in a while stall at full throttle again. I ran it 2 weeks ago and the same problem krept back. Fires up..idles fine and at full throttle after about 30 seconds it stalls out. I notice some gas leaking from the primer bulb and I thought my problem was solved. I replaced the primer bulb and started it on the hose. fired up idled for 5 minutes or so no worries. I took it out for a test run today and 30 seconds at full throttle it died. Stared back up and ran in at 1/4 throttle no problem. Any ideas. Please!