Designed solely for Mercury Marine and OMC outboard boat engines, this marine-suitable starter drive carries the part number 1977001. The unit uses rust-shielded hardened alloy steel as its core material, and this material keeps consistent cranking torque under humid, salt-saturated marine working scenarios. All gear teeth and splines are finely processed, which simplifies routine maintenance on marine starters and the swap of defective spare parts. Once the marine engine gets ignited, the built-in overrunning clutch offers powerful protection for the starter armature without delay. This accessory comes with an extended service cycle, so buyers can use it as a solid replacement for factory starter drives damaged by salt corrosion, slipping gears or mechanical fractures.
1. Basic Information
Item: Starter drive.
Function: Enables engine start by meshing with the flywheel.
2. Compatibility
Starters: Delco 10MT, SD300 Series DD Starters.
Equipment: Mercury Marine OMC (for marine - related engine starting).
3. OEM Reference
Replaces/matches parts: 1977001, 54 - 134 - 9.
4. Specifications
Teeth (T): 9
Dimension G: 25.8
Length (L): 80.5
Spline (SPL): 3
Inner Diameter (ID): 12
Outer Diameter (D): 46.5
Rotation Direction: Counter - clockwise (CCW)



1 years
China