This WSM powerhead rebuild kit is for Mercury and Mariner 3-cylinder outboards in the 1991-1997 application family. The primary 50 and 60 HP applications use a 2.955-inch bore, with additional Jet 45 and 55 HP applications documented for this kit.
Fitment
- Mercury/Mariner 50 HP 3-cylinder looper, 2.955-inch bore: 1991-1997
- Mercury/Mariner 60 HP 3-cylinder looper, 2.955-inch bore: 1991-1997
- Mercury 55 HP 3-cylinder application: 1991-1997
- Mercury Jet 45 HP 3-cylinder: 1991-1997
Technical Specifications
- WSM standard-size kit: 100-07-10
- 3-cylinder powerhead
- 2.955-inch standard bore for the 50/60 HP looper applications
Piston Size Options
- Standard
- .010 oversize
- .015 oversize
- .020 oversize
- .030 oversize
- .040 oversize
Measure the finished cylinder bore before selecting piston size.
Complete Kit Includes
- 3 WSM piston kits with rings, wrist pins, and clips
- Complete gasket kit: 1 base gasket, 3 carburetor gaskets, 1 reed-block gasket, 1 manifold gasket, 1 lower end-cap O-ring, 3 thermostat gaskets, upper/lower end-cap oil-seal components, 1 upper seal, and 1 lower seal
- 1 upper main bearing, 2 center main bearings, and 1 lower main bearing
- 3 upper and 3 lower connecting-rod bearings
- 6 connecting-rod bolts
Fitment Note
Outboard applications can vary by horsepower, year, bore size, rod-guidance style, and model or serial range. Compare the fitment and technical details above with your engine before ordering.
Questions About This Product?
Have questions about this product? Email us at customerservice@marinepartswarehouse.com and include your motor information with your question.
