Fits these engine models (and boats that we are aware used these engines... There could be other combinations as well):
• M-5411 (Catalina 27 and Catalina 30)
• M-5421 (S&S Catalina 38)
• M-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)
• M2-12 (Catalina 25, Capri 26)
• M3-20 and M3-20B (Catalina 27, Catalina 28, Catalina 30)
Not suitable for M-25XPB, M-35, M-35B, nor M-40B.

• Voltage: 12
• Power: 1.2kW / 1.61HP
• Number of teeth: 9
• Gear OD: 1.146" (29.1mm)
• Mounting holes, center to center: 4.330" (110mm)
• Mounting holes: cleared for M 8 fasteners
• Width across the mounting brackets, overall: ~5"
• Overall length: ~8-1/2"
• Exposed length from mounting flange to end of body: ~5-7/8"
• Height, from bottom of body to top of solenoid: ~5"
• Starter type: Permanent Magnet Gear reduction
• Warranty: 1 year

Does not fit the "B" series Universal engine models (M-25XPB, M-35B, nor M-40B) nor the M-35 engines.