CDI Electronics 18-99257 144-1889-52 Mercury Mariner RPM Rev Limiter 2/3/4 Cylinder 5800 RPM

The CDI Electronics 144-1889-52 is a direct-replacement RPM rev limiter designed for Mercury and Mariner 2-stroke outboard and SportJet engines. This electronic component protects the engine by limiting maximum engine speed to 5800 RPM, preventing over-rev damage during operation. It is a precision-engineered aftermarket replacement that meets or exceeds OEM specifications.

Key Features:

• RPM limiter set to 5800 RPM for precise over-rev protection
• Compatible with 2, 3, and 4 cylinder 2-stroke outboard and SportJet engines
• Covers model years 1992–2006
• Direct plug-in replacement — no modification required
• Manufactured by CDI Electronics, the industry standard for marine ignition components

Replaces Mercury/Mariner OEM Part Numbers:

• 821889A31, 821889A32, 821889A36, 821889A44, 821889A48, 821889A52, 821889T24
• Also replaces: 821889A2, 821889A4, 821889A6, 821889A8, 821889A12, 821889A14, 821889A15, 821889A18, 821889A24, 821889A50

CDI Electronics is a leading manufacturer of marine ignition components and electronic engine management parts, known for producing high-quality replacements for Mercury, Mariner, Force, and other major outboard brands.