Re: 2001 Yamaha 115 4 stroke
Remove all the fuel from every area of tank, lines, bulbs, primer bulb, filters, refill tank with fresh fuel and Stabil Marine Fuel Stabilizer. Start motor and take it out on water for a good run. If you're lucky then that old fuel that was in your system hasn't plugged anything up and you'll be good to go, otherwise look for fuel-related issues. Hope it runs great for you!