Specs: Alternator, Voltage: 12, Rotation: CW, Dimension: Replacement 65A Mando Unit:, Mtg. Ear 1 Hole: 5/16-18 Threaded, Mtg. Ear 2 Hole: 9.6mm Unthreaded, Mtg. Ear 1 Thick: 16.4mm, Mtg. Ear 2 Thick: 50.8mm, B+ Terminal: 1/4-20, IG Terminal: Bullet, S Terminal: Bullet, Note: NSK Bearings, Amperage: 65, Pulley Class: S6, Regulator: IR, Fan Type: EF, Brief: Mercury Marine, 6-Groove Pulley 63mm OD, Used on: 1985-On Mercruiser Models Replaces OEM Numbers: ARROWHEAD: AMN0024, J & N: 400-46040 Compatible With/Replacement For: CUMMINS MERCRUISER EI 165 2004-2005, EI 250 2004-2005, EI 300 2004-2005, ES 165 2004-2005, ES 250 2004-2005, ES 300 2004-2005, LUCAS Various Models All, MANDO Various Models All, MERCRUISER Black Scorpion Ski (Gen +) 1998-1998, Model 262 Mag (Gen +) (TBI) 1996-1997, Model 350 Mag Alpha EFI (Gen +) 1996-1997, Model 350 Mag Bravo MPI (Gen +) 1997-1997, Model 350 Mag EFI Ski (Gen +) 1997-1997, Model 350 Mag MPI (Gen +) All, Model 350 Mag MPI Alpha & Bravo 1998-2000 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. But in a rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we will take every step to assist you, contact us for a replacement. 100% New Aftermarket Alternator built to meet OEM specifications