This WSM powerhead rebuild kit covers the Yamaha 60 and 70 HP 3-cylinder applications listed below. The kit is built around the 2.834-inch bore family and includes the pistons, gasket set, and application-specific crank and rod bearings used in these powerheads.
Fitment
- Yamaha 60 HP 3-cylinder: 1991-2006
- Yamaha 70 HP 3-cylinder: 1984-2008
Technical Specifications
- WSM standard-size kit: 100-255-10
- 3-cylinder powerhead
- 2.834-inch standard bore
Piston Size Options
- Standard
- .010 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 gasket, 1 head-cover gasket, 1 base gasket, 2 reed-valve gaskets, 1 carburetor gasket, 2 exhaust-cover gaskets, 1 upper crank O-ring, 1 lower crank O-ring, 1 thermostat-cover gasket, 1 fuel-pump gasket, 2 lower crank oil seals, 1 upper crank oil seal, and 3 carburetor-mounting O-rings
- 1 upper main bearing and 1 lower main bearing
- Center main bearings are not included for this application
- 3 upper connecting-rod bearings
- Lower rod bearings are not included for this application
Fitment Note
Yamaha applications can vary within the same horsepower and year range. Verify the horsepower, year, cylinder configuration, bore size, and any reed or connecting-rod details listed above 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.
