This WSM powerhead rebuild kit covers the later Mercury and Mariner 3-cylinder looper family built around a 3.500-inch bore. The standard 100-40-10 kit is commonly cataloged for 65-90 HP applications, with individual horsepower ranges differing within the overall 1994-2006 family.
Fitment
- Mercury/Mariner 75 HP 3-cylinder looper: 1994-2004
- Mercury/Mariner 90 HP 3-cylinder looper: 1994-2004
- Mercury 65 HP application: 1994-2005
- Mercury Jet 80 HP application: 1994-2005
- Some catalogs continue the overall 100-40-10 kit family through 2006; verify model/serial information on late applications
Technical Specifications
- WSM standard-size kit: 100-40-10
- 3-cylinder looper powerhead
- 3.500-inch standard bore
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 head-cover gasket, 1 base gasket, 6 carburetor gaskets, 6 reed-block gaskets, 2 exhaust gaskets, lower end-cap and crank O-rings, 1 upper crank O-ring, 1 3.0-liter O-ring, 1 fuel-pump gasket, 1 upper crank oil seal, and 1 lower end-cap oil 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.
