leaptrend Alternator 12V 55A for Mercury 135–150HP Outboards — 4-Groove 64mm Pulley, Drop-In Replace 8M0057693

This LEAPTREND alternator is a drop-in style charging unit built to fit Mercury Marine 4-stroke outboard engines—including SeaPro and Pro XS variants—so you can restore reliable electrical power aboard boats from 2012 and up. Designed to match the electrical and mechanical specifications of the original equipment, it supports essential systems such as ignition, accessories, and battery charging while compact enough to fit the OEM mounting footprint.

Will this alternator fit my Mercury outboard model?

If your engine is a 135HP or 150HP Mercury 4-stroke (including 150CXL SeaPro, 150L, 150L Pro XS, 150XL, and SeaPro variants) and it uses a 4-groove pulley with 64mm outer diameter, this unit is designed to be compatible. Always confirm the existing alternator part number before ordering.

• Compatible Mercury models listed: 150CXL SeaPro, 150L, 150L Pro XS, 150L SeaPro, 150XL, 150XL Pro XS, 150XL SeaPro.
• Suitable engine ratings: 135HP and 150HP 4-stroke outboards.
• Pulley requirement: 4-groove pulley with 64mm OD.
• Confirm OEM numbers: 8M0057693, 8M0062515, 8M0065239, ARROWHEAD AND0626, J&N 400-52434.

How does the electrical performance match the original alternator?

This alternator provides 12 volts at a rated 55 amps, matching the electrical output expected from the referenced OEM units. That output is suitable for keeping batteries charged and supplying onboard electronics while running.

• Rated voltage: 12 V for standard marine electrical systems.
• Rated current: 55 A to support battery charging and accessories.
• Operating frequency listed at 50 Hz—meets typical alternator design specs.
• Built for 4-stroke engine electrical demands common on Mercury outboards.

What mechanical details should I check before ordering?

To avoid returns and ensure a correct fit, verify the pulley groove count and outer diameter, and cross-check the part number printed on your original alternator. The mounting points and connector style should match the OEM unit for a straightforward swap.

• Pulley: 4-groove, 64 mm outer diameter required.
• Mounting: designed as a direct-replacement footprint for listed part numbers.
• Connector and wiring: confirm plug style and lead locations on your current alternator.
• Model year fitment: commonly used on 2012 and later SeaPro and Pro XS engines.

What after-sales support does LEAPTREND provide?

LEAPTREND offers replacement support and customer service to help with fitment questions or warranty concerns. If the alternator does not meet compatibility expectations, contact the seller for guidance before initiating a return.

• Carefree replacement policy available—contact for details.
• Customer service assistance for part verification and installation questions.
• Instructions: check OEM part number to minimize fitment issues.

Who is this for: This alternator is aimed at boat owners, marine mechanics, and fleet maintenance teams needing a reliable replacement for Mercury 135HP or 150HP 4-stroke outboards that require a 12V 55A charging unit with a 4-groove 64mm pulley. It suits anyone restoring electrical charging capability to SeaPro or Pro XS boats from 2012 onward and who want a part that lists the common OEM cross-references for a confident swap.