CDI 144-1889-51 Mercury Mariner RPM Limiter - 5200 RPM 2 Stroke Outboard and SportJet Engines requiring a 5200 RPM Limit (1992-2006)Replaces: 821889A19; 821889A22; 821889A28; 821889A29; 821889A34; 821889A40; 821889A41; 821889A42; 821889A45; 821889A46; 821889A47; 821889A49; 821889A50; 821889A51; 821889A53;