Mercury – Voltage Regulator/Rectifier | FourStroke 30–60 HP Series | Marine-Grade Composite & Stainless Steel | 893640T01

Overview
There’s a certain peace that settles in when your electrical system is steady and predictable. You feel it the moment your gauges stay bright, your electronics hold their charge, and your engine fires up without hesitation. A good voltage regulator isn’t something most boaters think about, but when it’s doing its job right, the whole boat just feels calmer and more dependable. This Mercury Marine part brings that quiet confidence every time you push away from the dock, whether you’re running upriver at dawn or drifting into a still, glassy cove late in the afternoon.

Key Features
• Regulates and stabilizes charging voltage for dependable electrical performance.
• Designed for Mercury FourStroke 30–60 horsepower engines, including Electronic Fuel Injection, Racing, Jet, Formula, and SeaPro models.
• Built with marine-grade composite housing and Stainless Steel hardware.
• Precise internal circuitry protects batteries and electrical components.
• Engineered to Mercury Marine part number specifications.
• Straightforward installation with common shop tools.

Engine & Boat Compatibility
• Fits Mercury FourStroke 30–60 horsepower outboards.
• Compatible with three-cylinder and four-cylinder Electronic Fuel Injection engines.
• Works with Racing, Jet, Formula, and SeaPro variants.
• Common on pontoons, skiffs, aluminum fishing boats, bay boats, and small cruisers.

Performance & Practical Benefits
A strong regulator makes every electrical component feel smoother and more reliable. You’ll notice fewer dimming lights at idle, steadier voltage on your display, and cleaner starts after long hours of trolling or drifting. This regulator provides a tight, controlled output that protects your battery from overcharging while keeping electronics running the way they’re meant to.

The composite housing holds up well to vibration and moisture, while the Stainless Steel hardware resists corrosion in harsh saltwater environments. Once installed, the part feels secure and properly aligned—no forcing, no awkward wire angles. And because it matches factory specifications, your charging system stays predictable no matter how long you’re on the water.

A reliable regulator isn’t glamorous, but it’s one of those pieces that quietly supports every trip. When it works, you feel the difference in the engine’s rhythm and the boat’s overall calmness.

Why Buy OEM
Electrical parts are not something to gamble on. An aftermarket regulator may look similar, but even tiny differences in voltage control can cause battery issues, sensor failures, or unpredictable charging. A genuine Mercury Marine part delivers exactly the voltage range your engine was designed for—nothing more, nothing less.

OEM also means proper fitment, better durability, and long-term reliability. If a fellow boater asked what to choose, you’d tell them to stick with original parts for anything that touches the charging system.

FAQ

Q1: Which engines does this voltage regulator fit?
It fits Mercury FourStroke 30–60 horsepower engines, including Electronic Fuel Injection, Racing, Jet, Formula, and SeaPro models.

Q2: What makes it different from aftermarket regulators?
It delivers precise voltage control that matches Mercury’s factory specifications, protecting the entire electrical system.

Q3: How do I confirm it’s the right replacement?
Check your owner’s manual or parts list. If it matches part number 893640T01, this is the correct part.

Q4: Can it be used in saltwater and freshwater?
Yes—its composite housing and Stainless Steel hardware resist corrosion extremely well.

Q5: Is installation straightforward?
Most boaters with basic tools can install it quickly by following the engine’s service instructions.