Hi there,<br /><br />I have a 2-stroke 15hp Mercury outboard that's about 10 years old. The forward, neutral and reverse control is in the tiller twist grip (thought this might help).<br /><br />I don't have the model or S/N but I can get it.<br /><br />Is the info I've given enough for someone to tell me the fuel/oil mixture ratio for this engine?<br /><br />Thanks in advance.