Hardin Marine

13 Plate Remote Cooler Assembly

This multi plate design oil cooler assembly is used in virtually every severe duty type of oil cooling environment found today. Recognized by Mercury Racing and every high profile professional engine builder as the most effective method to control oil temperature. The 8, 13, and plate oil cooler design offers maximum heat dissipation in the most compact size and use of space. This is basically the same cooler package that's incorporated into a dual cooler style of race bellhousing. Now you can have the same great cooling features in a remote mountable unit. The cast aluminum housing features a hard anodized finish for corrosion resistance. Each housing has 1" NPT water inlets/outlets and a dual bolt mounting flange and will accept a 8, or 13 plate cooler assembly when used with the appropriate cover assembly.

Length 11-3/4", Height 5", and depth based on the 13 plate configuration is 5-3/4".

Hardin Billet Aluminum Flywheel Internal Balance for GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material:Aluminum

These precision billet aluminum flywheels deliver all of the strength and reliability that you desire with the light weight and advantages that only aluminum can provide. Lightweight Aluminum alloy flywheels can offer substantial benefits for certain situations such as light weight boats or racing boats that need rapid engine rpms instantaneously. These are recommended as replacements for factory-cast flywheels in high performance and racing applications. They're better for acceleration of heavier race boats. All Hardin flywheels are CNC-machined from certified materials.

• Accepts Mercury HP couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• Bottom Mount Starter Flywheel
• Weight: 12 lbs

Hardin Marine Classic Offshore Group 27 Battery Box Step Top

Add a heavy duty and stylish step top to your battery box! Fits 420-913027 battery box.

• LED Lighted Indicator System by Mayfair for Use with Dual Mercury #6 Outdrives.
• Lights Run through Red, Green and Blue from Top to Bottom.
• Available with Carbon Fiber faces in Black, Silver, Blue, Red and Purple
• Polished and Powder-Coated Stainless Steel Rim.
• Easy to Install and Simple Wiring. No Cables Required.
• 5" Length x 2-1/2" Width Panel
• Complete Kit - Includes Panel, Harness, and Electronic Sensor Actuators.

• LED Lighted Indicator System by Mayfair for Use with Single Imco SCX Drive
• Single Drive Setup Lights Up Both Sides Evenly for Single Drive Display.
• Lights Run through Red, Green and Blue from Top to Bottom.
• Available with Carbon Fiber faces in Black, Silver, Blue, Red
• Polished and Powder-Coated Stainless Steel Rim.
• Easy to Install and Simple Wiring. No Cables Required.
• Includes: (2) Wiring Harnesses
• 5" Length x 2-1/2" Width Panel
• Complete Kit - Includes Panel, Harness, and Electronic Sensor Actuators.

• LED Lighted Indicator System by Mayfair for Use with Single Mercury Bravo Drive
• Single Drive Setup Lights Up Both Sides Evenly for Single Drive Display.
• Lights Run through Red, Green and Blue from Top to Bottom.
• Available with Carbon Fiber faces in Black, Silver, Blue, Red
• Polished and Powder-Coated Stainless Steel Rim.
• Easy to Install and Simple Wiring. No Cables Required.
• Includes: (2) Wiring Harnesses
• 5" Length x 2-1/2" Width Panel
• Complete Kit - Includes Panel, Harness, and Electronic Sensor Actuators.

• LED Lighted Indicator System by Mayfair for Use with Single Mercury Speedmaster / TRS / Alpha Drive
• Single Drive Setup Lights Up Both Sides Evenly for Single Drive Display.
• Lights Run through Red, Green and Blue from Top to Bottom.
• Available with Carbon Fiber faces in Black, Silver, Blue, Red
• Polished and Powder-Coated Stainless Steel Rim.
• Easy to Install and Simple Wiring. No Cables Required.
• Includes: (2) Wiring Harnesses
• 5" Length x 2-1/2" Width Panel
• Complete Kit - Includes Panel, Harness, and Electronic Sensor Actuators.

Hardin Marine is proud to introduce our new Hurricane Lite Headers. Featuring the same quality design and sleek looks of their big tube counterparts, the Hurricane Lite Headers are designed to replace standard HP500, 600, and 700 Headers. The 100% 316L stainless steel headers are completely annealed and stress relieved prior to the show quality polishing to ensure maximum durability. The header and tailpipe share a double wall design and water transfer system that even allows the option of pre-heating the incoming sea water. 2" inner tubes and 2.5" outer tubes. The Hurricane Lite Headers are available with a standard OEM Mercury CMI flange for use with OEM or CMI style Tailpipes.

More original features are the V-Tex collector design and aerospace inspired multi-axis leakproof bolted tailpipe flange, no hose type clamps or rope seals are used here. Each header offers a welded water inlet tree as standard equipment, once again you won't find any failed rubber hoses here. These headers share the latest in exhaust technology to achieve maximum horsepower gains on even the highest horsepower engines. By incorporating long staggered length runners that also provide for generous tall valve cover clearance.

• Non-corrosive hardware
• Gasket sealed lens and bezel to prevent fogging
• Plastic body Domelux Technology Lens
• White back light
• Includes hose and fitting kit
• 2 1/16" hole size, Outer diameter 2 5/16"
• Not Designed to be used with Diesel Engines.
• NOTE: This older style gauge matches 2018 and earlier model Hardin Gauges.

Need help measuring your gauges so you know what to look for when you finally upgrade to a more polished set? Check out this handy tutorial!

3-3/8" Black 6000 RPM Hardin Tachometer

• Non-corrosive hardware
• Gasket sealed lens and bezel to prevent fogging
• Each tachometer can be calibrated to work with 4, 6, and 8 cylinder engines as well as outboards.
• Plastic body
• Domelux Technology Lens
• White back light
• 3 7/8 Outer diameter 3 3/ 8 hole size
• Can Not Be Used with Diesel Engines!
• NOTE: This older style gauge matches 2018 and earlier model Hardin Gauges.

• Non-corrosive hardware
• Gauge uses a 1/8" speedo hose
• Gasket sealed lens and bezel to prevent fogging
• Plastic body Domelux Technology Lens
• White back light
• 3 7/8" Outer diameter 3 3/ 8" hole size
• Speedometer pick-up tubes (pitot) sold separately.
• Not Designed to be used with Diesel Engines.
• NOTE: This older style gauge matches 2018 and earlier model Hardin Gauges

Need help measuring your gauges so you know what to look for when you finally upgrade to a more polished set? Check out this handy tutorial!

1 Stage Aluminum Sea Pump

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

1 Stage Aluminum Sea Pump with 1 Groove Pulley & Single 1" NPT Inlet/Outlet

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

1 Stage Aluminum Sea Pump with 2 Groove Pulley & Single 1” NPT Inlet/Outlet

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

1 Stage Stainless Steel Sea Pump

• Base Pump with no inlets and outlets
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

1 Stage Stainless Steel Sea Pump with 1 Groove Pulley & Single 1” NPT Inlet/Outlet

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

1 Stage Stainless Steel Sea Pump with 2 Groove Pulley & Single 1” NPT Inlet/Outlet

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

• 1" Male NPT fitting.
• 316L Stainless Steel Bracket Style.
• Allows for easy install and plumbing.
• Race Proven!

• Tube style design allows them to be tailor-fitted to your application.
• Accepts a standard 1" Male NPT and 1-1/4" inlet hose.
• Easy 3-bolt attachment.
• 9-1/2" Long.
• Cut tube to the length you need.
• 316L Stainless Steel

This hard wall water hose is used in many marine applications and is designed to last in harsh environments.

Water hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Standard Softwall Water Hose 1" I.D.

This hose is perfect for plumbing the cooling system for most boats.

Water hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.

This hose is commonly used for venting or bilge dump.

Vent / Bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.

• 1" NPT female port.
• Features an O-Ring Seal.
• Ma from 316L Stainless Steel.
• Pick up can be adjusted for perfect placement.
• Mounting tube has 3" OD
• Pick-up tube has 1-1/4" OD
• Overall Length 7"

1" NPT Inlet/Outlet Sea Pump Adapter

These components are designed to assist in the plumbing of your engine when using the Hardin Marine Multi-Stage sea pumps. A wide range of configurations can be created by using different inlet and outlet adapters.