Fits these Universal Engine Models:
• 5411 (Catalina 27, Catalina 30)
• M-12 (Catalina 25, Capri 26)
• M2-12 (Catalina 25, Capri 26)
• M-18 (Catalina 27, Catalina 30)
• M-25 (Catalina 30, Catalina 34, Catalina 36)
• M-25XP (Catalina 28, Catalina 30, Catalina 34, Catalina 36)
• M3-20 (Catalina 28*)
• 5424 (later designated M-30 used in the S&S Catalina 38)
• M-35 (Catalina 34, Catalina 36)
• M-25XPB (Catalina 28 MkII, Catalina 30 MkIII, Catalina 310)
• M-35B (Catalina 34 MkII, Catalina 350, Catalina 36 MkII)

*Owner with a M3-20 engine in their C-28 did not have room in their engine compartment for this larger retrofit alternator. It may be tough retrofit in any C-28 given their smaller engine compartments.

• 120 amp heavy duty alternator
• Internal regulator
• Includes 2" mounting foot
• Wire assembly, Red, 4 AWG x 18" w/5/16" lugs handle additional current
• Wire assembly, Black, 4 AWG x 32" w/5/16" lugs handle additional current
• Manufacturer instructions and instrument adjustment reference guide
• Includes pulley

Use the included wire assembly to connect the high output alternator to the starter. You may want to check the gauge and condition of wire from the starter to the battery and the battery back to the alternator to ensure the wire can handle the new increased electrical load.

Recommended minimum wire sizes for output current:
• 5' or less: No. 8
• 5' to 10': No. 6
• 10' to 20': No. 4

Remember a minimum of 12 volts is needed for the alternator excite to work for proper charging for this alternator or any other boat alternators.