Mercury - Quicksilver 8M6007423 Engine Starter Yamaha Small Outboard Series Marine-Grade Finish 8M6007423. Overview. When you spend enough mornings on the water, you learn to appreciate the small things-like an engine that fires up without drama. That steady, confident crank sets the tone for the whole day, whether you're heading out before sunrise or motoring back after a glass-calm afternoon. The Quicksilver 8M6007423 Starter brings that familiar sense of reliability to your 9.9-15 horsepower