YRANZO 12V Starter Relay Solenoid Switch for Mercury/Johnson Outboards — Direct-Fit Replacement, Corrosion-Resistant Terminals

YRANZO 12V starter relay solenoid switch reliably replaces OEM part numbers for Mercury, OMC, Sierra and Johnson/Evinrude outboards to restore consistent starting power.

This heavy-duty 12V starter relay (solenoid) is designed to be a direct-fit replacement for many common outboard marine starters. It matches multiple OEM reference numbers so you can swap it into Mercury Marine, OMC outboards, Sierra Marine and Johnson/Evinrude systems without major modification. The flat mounting base and included hardware simplify installation, while the accessible terminals make adding a remote starter switch or timing light straightforward.

Which engines and part numbers does this solenoid fit?

This relay covers a broad list of OEM references used on popular outboard models. Cross-reference your existing part number against the compatibility list to confirm fit before ordering.

• Compatible brands: Mercury Marine, OMC Outboard Marine, Sierra Marine, Johnson/Evinrude
• Common OEM numbers covered: 18-5808, 3217124, 383622, 389398, 389493, 380095
• Also replaces: 395419, 47886, 47886T, 582708, 586180, SMR6003, 0395419

How easy is installation and what tools are required?

Installation is engineered to be user-friendly: the flat base offers simple mounting and two sets of screws are included so you can fasten it securely. Basic hand tools are sufficient for most swaps, and the terminal layout supports easy wiring for both the main battery cables and a remote starter or timing light hookup.

• Included hardware: one starter relay and two sets of screws
• Tools typically needed: wrench set, screwdrivers, and basic electrical cleaner
• Mounting: flat base simplifies alignment and bolt-down
• Wiring: clear terminal access for battery and starter leads

What electrical specifications and features should I expect?

This component is a 12-volt solenoid designed for starting circuits on outboard engines. It is built to handle the high-current demands of starter motors while offering reliable actuation for repeated use in marine environments. Do not use it outside of 12V starter applications or in systems requiring different specs.

• Voltage rating: 12V for standard outboard starter systems
• Function: high-current switching for starter motor engagement
• Construction: corrosion-resistant terminals suitable for marine use
• Accessory-ready: terminal layout supports remote connections

What should I check before purchasing to ensure compatibility?

Confirm the OEM part number stamped on your existing solenoid and compare it to the cross-reference list. Verify your boat’s make and model year and double-check electrical layout to avoid mismatches, particularly when multiple solenoid designs exist for the same engine family.

• Match the part number on your old solenoid to the replacement list
• Confirm your outboard brand and model year for fitment accuracy
• Inspect mounting bolt pattern and terminal placement before install
• Contact the seller with questions—YRANZO provides support for fitment inquiries

Who is this for: This YRANZO 12V starter relay is aimed at boat owners, marine technicians and DIY mechanics who need a reliable OEM-equivalent replacement for Mercury, OMC, Sierra or Johnson/Evinrude outboard starter systems. It's particularly useful if you have the matching part number or require an accessible solenoid with an easy mounting base for quick field swaps or workshop repairs.