Sierra Marine Starter Gear Reduction (MPN: 18-6275-1)

High-performance starter designed for marine engines with advanced protection features.

The Sierra Marine Starter Gear Reduction is engineered to meet the demands of high horsepower marine engines while providing reliable performance in harsh environments. With a gear reduction ratio of 4.909:1, this starter is compatible with 1983 and newer GM V-6 and V-8 engines, as well as 1999 and newer MCM 3.0 liter engines. The design incorporates features that isolate internal components from extreme marine conditions, ensuring longevity and durability.

This starter includes an integrated one-way valve and relief cuts that effectively remove moisture and prevent water accumulation, which is critical for maintaining optimal functionality in marine applications. The exterior housing is painted to resist rust and corrosion, allowing the starter to maintain its appearance and performance over many years of service. Sierra Marine products are known for their quality, meeting or exceeding the specifications of the original equipment they replace, making them a trusted choice for marine engine components.

Features

• Designed To Isolate The Internal Components From The Extreme Elements Found In The Marine Environment
• Integrated One-Way Valve And Relief Cuts To Remove Moisture And Prevent Water Accumulation
• Starter Housing Is Painted To Prevent Rust And Corrosion On The Exterior Surface While Keeping Your Starter Looking Like New After Many Years Of Service
• All Marine Products Both Meet Or Exceed The Original Equipment Part It Replaces

Specifications

• Manufacturer: Sierra Marine
• Manufacturer Part Number: 18-6275-1
• Condition: New
• Flywheel/Flex Plate Tooth Count: 153/ 168
• Color: Black
• Drive Type: Gear Reduction
• Gear Reduction Ratio: 4.9:1

Technical Documents

• Starter-Brochure_2020.pdf