This WSM powerhead rebuild kit covers the Mercury and Mariner 2.5L OptiMax DFI family using 600-series connecting rods and O-ring cylinder heads. Standard bore is 3.501 inches, and WSM identifies the standard kit as 100-49-10 for serial number 0T178500 and up.
Fitment
- Mercury Jet 110 HP 2.5L DFI: 2006-2013
- Mercury/Mariner OptiMax 135 HP 2.5L DFI: 1998-2012
- Mercury/Mariner OptiMax 150 HP 2.5L DFI: 1998-2014
- Mercury/Mariner OptiMax 175 HP 2.5L DFI: 2001-2014
Technical Specifications
- WSM standard-size kit: 100-49-10
- 6-cylinder 2.5L OptiMax DFI powerhead
- 3.501-inch standard bore
- 600-series connecting rods
- O-ring cylinder heads
- Standard kit fitment: serial number 0T178500 and up
Piston Size Options
- Standard
- .015 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, 1 plate gasket, 1 divider-plate gasket, 1 upper end-cap O-ring, 1 lower end-cap O-ring, 6 inner head O-rings, 2 outer head O-rings, 1 throttle-body O-ring, 1 fuel-pump gasket, 2 relief-valve gaskets, 2 case-half gaskets, 1 thermostat gasket, 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.
