Sierra Alternator 18-6298 - 70A 12V for MerCruiser 600 SCI GM V-8 2005-2010

The Sierra 18-6298 is a 70-amp, 12-volt marine alternator engineered to maintain proper charging levels on inboard and sterndrive engines. It is marine grade, built with heavy-duty bearings and an internal regulator for a longer service life in the harsh marine environment, and it contains high quality stators and heavy-duty rectifiers for maximum charging efficiency. Every Sierra alternator meets or exceeds USCG, SAE J1171, and ISO 8846 safety standards and is 100% load tested before it ships, so it is ready to install and run right out of the box.

This alternator uses an internal fan and negative polarity, with an M6-1.0 stud size and a 6-groove, 1.97 inch diameter serpentine pulley on a hinge mount, 7-SI style bracket configuration. It fits MerCruiser 600 SCI models with GM V-8 engines, serial number M952908 and up. It is backed by Sierra's customer satisfaction warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6298
• Voltage: 12V
• Amperage: 70A
• Fan Type: Internal
• Regulator Type: Internal
• Polarity: Negative
• Stud Size: M6-1.0
• Pulley Type: 6-Groove, 1.97 inch Diameter Serpentine Pulley
• Mount Type: Hinge Mount, 7-SI
• Weight: 9.4 pounds
• UPC: 808282187385

Fitment

• MerCruiser 600 SCI, GM V-8, 2005-2010, serial number M952908 and up

Replaces (OEM)

• Mercury Marine 863077T
• Mercury Marine 863077-1
• Arco 20815
• Delco 19020611
• Delco 19020612

Frequently Asked Questions

What engines does the Sierra 18-6298 alternator fit? The Sierra 18-6298 fits MerCruiser 600 SCI models with GM V-8 engines, serial number M952908 and up.

What OEM part numbers does the 18-6298 alternator replace? It replaces Mercury Marine 863077T and 863077-1, Arco 20815, and Delco 19020611 and 19020612, making the Sierra 18-6298 a direct equivalent for those part numbers.

What is the amperage and voltage output of this alternator? The Sierra 18-6298 is a 12-volt alternator rated at 70 amps, with an internal regulator and internal fan.

How much does the Sierra 18-6298 alternator weigh? This alternator weighs 9.4 pounds.

What size pulley does the 18-6298 alternator use? It has a 6-groove serpentine pulley with a 1.97 inch diameter.

Is this alternator positive or negative ground? The Sierra 18-6298 is negative polarity.

What size are the mounting studs on the 18-6298? The stud size is M6-1.0.

Is the Sierra 18-6298 tested before shipping? Yes, every Sierra 18-6298 alternator is 100% load tested for assured reliability before it leaves the factory.

Does the 18-6298 meet marine safety standards? Yes, it meets or exceeds USCG, SAE J1171, and ISO 8846 safety standards, the standard benchmarks for marine electrical components.

What kind of mount does the 18-6298 alternator use? It uses a hinge mount, 7-SI style bracket configuration.

Is the Sierra 18-6298 covered by a warranty? Yes, the 18-6298 is covered under Sierra's customer satisfaction warranty as part of its standard product line.

Is the Sierra 18-6298 a genuine OEM part or aftermarket? The 18-6298 is a Sierra-manufactured marine replacement alternator, engineered to meet or exceed the original equipment it replaces such as Mercury Marine 863077T and 863077-1.