This starter solenoid relay is compatible with part numbers 53716, 03057700, 3057700, 725-0530, 725-1426, 925-0771, 925-1426, 9251426A, 21261, 24285, 424285, and 5409H.It is designed for use in starter motor circuits to control the engagement of the starter drive.The relay ensures a electrical connection between the and starter motor during engine startup.Constructed to align with specifications for proper fit and function.