This WSM powerhead rebuild kit is for Mercury and Mariner 135-150 HP 2.5L carbureted V6 powerheads using O-ring cylinder heads and top-guided rods. The O-ring head configuration is a key fitment point because the conventional head-gasket carbureted family uses a different WSM kit.
Fitment
- Mercury/Mariner 135-150 HP 2.5L carbureted V6 O-ring-head applications: 1992-2012
Technical Specifications
- WSM standard-size kit: 100-20-40
- 6-cylinder 2.5L carbureted V6 powerhead
- 3.500-inch standard bore
- O-ring cylinder-head configuration
- Top-guided connecting rods
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
- 6 WSM piston kits with rings, wrist pins, and clips
- Complete gasket kit: 1 drive-housing gasket, 1 base gasket, 1 drive-plate gasket, 1 reed-block gasket, 3 attenuator gaskets, 3 carburetor gaskets, 1 divider-plate gasket, upper/lower end-cap O-rings, 6 inner head O-rings, 2 outer head O-rings, 1 fuel-pump gasket, 4 relief-valve gaskets, 2 case-half gaskets, 2 thermostat gaskets, 1 divider-hose seal, and 3 end-cap oil seals
- 1 upper main bearing, 2 center main bearings, and 1 lower main bearing
- 6 upper and 6 lower connecting-rod bearings
- 12 connecting-rod bolts
Fitment Note
Mercury and Mariner V6 and L4 applications can differ by bore, rod-guidance style, induction system, cylinder-head sealing style, connecting-rod family, and serial range. Verify the technical details above against the 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.
