Mercury - Timing Belt 8-9.9 HP Four-Stroke Series Reinforced Marine Composite 895120. Overview. Small outboards earn your trust in a different way. You feel every bit of their effort when you're running a shoreline, trolling a grass line, or easing across a quiet lake at first light. And when an engine that size runs smooth, you notice it immediately. A dependable timing belt keeps that rhythm steady-the clean turn of the camshaft, the smooth pulse of combustion, the quiet assurance that the eng