Sierra 118-99442 Voltage Regulator for Mercury Mariner Outboard 40-Amp

The Sierra 118-99442 is a replacement voltage regulator designed for Mercury and Mariner outboard motors with 40-amp charging systems. This aftermarket component regulates the charging voltage to maintain proper battery charging levels, typically around 14.4 volts, preventing overcharging or undercharging of the electrical system.

Key Features:

• 40-amp power capability for demanding electrical loads
• 12-volt DC operating voltage with regulated output
• Engineered to meet or exceed OEM specifications
• Direct replacement for Mercury Mariner applications
• Protects battery and electrical components from voltage fluctuations

Sierra Marine products are built to withstand harsh marine environments and provide reliable performance. Proper voltage regulation is essential for maintaining battery health and ensuring consistent operation of electronic components on your outboard motor.