Starter Drive for Mercury Marine (Delco/SD300 Series)

This starter drive is engineered for Mercury Marine outboard motors fitted with Delco SD300 starter assemblies. Built using wear-resistant hardened alloy steel, it maintains steady cranking torque coping with continuous marine operating conditions. Accurately formed gear teeth and splines support simple installation. The integrated overrunning clutch shields the starter armature once ignition occurs. It works as a dependable aftermarket substitute for worn, slipping or defective original starter drives.

1. Basic Information

• Item: Starter Drive Gear

• Function: Meshes with the engine flywheel to transfer starter torque for smooth engine startup.

2. Compatibility

• Brand/Starters: Mercury Marine applications; fits Delco 10MT, SD300 Series DD Starters.

3. OEM Reference Codes

Matches codes: 1937554, 1974665, 1.01.0977.0, 233173, 54-183-1.

4. Specifications

• Teeth (T): 9

• G Dimension: 25.8

• Length (L): 93

• Splines (SPL): 3

• Inner Diameter (ID): 12

• Diameter (D): 46.5

• Rotation Direction: Counterclockwise (CCW)