Sierra Rectifier 18-5707, Replaces Mercury Marine 62351A1, 62351A2, 816770T

The Sierra 18-5707 is a marine rectifier built for outboard charging systems that use a square, 3 post rectifier configuration. It converts the alternating current produced by the outboard's stator into direct current to charge the battery and power onboard electronics, making it a core component of the engine's charging circuit. The housing has a machined exterior for a precise fit and reliable heat dissipation during operation. This rectifier is designed as a direct replacement for the original Mercury Marine unit, so it installs using the same 3 post mounting pattern without modification. Sierra manufactures this part to work in place of the OEM Mercury Marine rectifier and backs it with Sierra's industry leading customer satisfaction warranty, giving boat owners a dependable option for restoring their outboard's charging system. Compact and lightweight at just over two ounces on the water and rated in the specifications below, the 18-5707 is sized to fit within the same footprint as the original equipment part it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5707
• Product Name: Rectifier
• Weight: 0.13 pounds
• Product Dimensions: 2 x 4 x 4 inches
• Exterior Finish: Machined
• Post Configuration: Square, 3 post rectifier
• UPC: 030999319524
• Category: Mercury Outboard Voltage Regulators

Fitment

• All outboard applications using a square, 3 post rectifier

Replaces (OEM)

• Mercury Marine 62351A1
• Mercury Marine 62351A2
• Mercury Marine 816770T

Frequently Asked Questions

What does the Sierra 18-5707 rectifier fit? The Sierra 18-5707 fits outboard applications that use a square, 3 post rectifier configuration, and is designed as a direct replacement for the Mercury Marine rectifier it corresponds to.

Which Mercury Marine part numbers does the 18-5707 replace? It replaces Mercury Marine 62351A1, 62351A2, and 816770T.

Is the Sierra 18-5707 an OEM part or an aftermarket replacement? The 18-5707 is a Sierra aftermarket rectifier manufactured to replace the equivalent Mercury Marine rectifier, not an OEM Mercury Marine part.

How much does the 18-5707 rectifier weigh? The Sierra 18-5707 rectifier weighs 0.13 pounds.

What are the dimensions of the 18-5707 rectifier? The product dimensions of the Sierra 18-5707 are 2 x 4 x 4 inches.

What finish does the 18-5707 rectifier have? It has a machined exterior finish.

How many mounting posts does the 18-5707 rectifier have? The 18-5707 is a square, 3 post rectifier.

Does the 18-5707 come with a warranty? Yes, the Sierra 18-5707 rectifier is covered under Sierra's industry leading customer satisfaction warranty.

What is the function of the 18-5707 rectifier in an outboard's charging system? The 18-5707 converts alternating current from the outboard's stator into direct current to charge the battery and run onboard electronics.

What UPC is associated with the Sierra 18-5707? The Sierra 18-5707 rectifier carries UPC 030999319524.