Description

The Sierra 18-7083 Mercury Primer Bulb is a replacement for Mercury part number 858763. Fits select Mercury models. Each Sierra product meets or exceeds the original equipment part it replaces. Constructed with high quality precision for optimal performance and reliability.
Sierra Primer Bulb
Meets or exceeds the original equipment quality
Precision construction
Interchangeable with the following: Mercury 858763, 8168773, 8168772, 8168771, 816877, 684311
Fit specific, check part numbers to ensure proper fit