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Caterpillar C-10 Caterpillar C-12 Caterpillar C-13 Caterpillar C-15 Cummins ISM Cummins ISX

Caterpillar C-15 Cummins ISX

Caterpillar C-13 Caterpillar C-15 Cummins ISX

Caterpillar 3176 Caterpillar C-10 Caterpillar C-11 Caterpillar C-12 Caterpillar C-13 Caterpillar C-15 Cummins ISM Cummins M11 Cummins N14  

Caterpillar 3208 Mack Engines Scandia E4-210

Approx. 16 inch overall length. 19011529, 19011530.  IMS (integrated magnetic relay)  Notice how solenoid mounting bolts go through solenoid and thread into housing.   11 or 12 teeth on gear. Non-rotatable nose.      Solenoid ground wire on left. S wire goes to IMS on right.     OCP (over crank protection)  

Mitsibishi. Notice how solenoid bolts go through starter and thread into solenoid.  

41MT. Similar to 37MT but internal parts are different. Small post on solenoid: Activates from ign on right, ground wire on left. Optional OCP over crank protection.  

Delco approx. 19 1/2 inches end to end. 10461033, 10461038, 10461052, 10461533 plus many others.   Ground wire on left of solenoid, s terminal on right.  Some have OCP (over crank protection)   11 teeth bendix most common. Also available in 10 or 13.  Roughly 3 inch back plate length.