Hardin Marine

15 Plate Stainless Steel Xtreme Duty Multi-Plate Oil Cooler

Our parallel multi-plate stainless steel oil coolers are the very best cooler available on the market today. Plate style coolers are unmatched in heat transfer providing maximum temperature reduction consistently while offering little to no pressure drop associated in other designs. The stainless construction offers superb corrosion resistance.

• Made from high strength 535 Aluminum Magnesium alloy.
• All 316 Stainless Steel hardware.
• 1-1/2" Piston bore.
• Two way hydraulics for improved performance.
• Zinc Anodes to prevent corrosion.
• Includes trim pumps and bulkhead brackets.
• Include Trim Hoses.
• Includes Trim Switch Panel.
• For 20-30 Ft. Boat Lengths
• Includes installation hardware for a 33c cable, for mechanical trim indicator systems.
• Black Standard Color, White available as custom colors (may take up to 6 weeks)

• Made from high strength 535 Aluminum Magnesium alloy.
• All 316 Stainless Steel hardware.
• 1-1/2" Piston bore.
• Two way hydraulics for improved performance.
• Zinc Anodes to prevent corrosion.
• Includes Electronic Sensors for the Mayfair LED Trim Indicator Systems
• Includes trim pumps and bulkhead brackets.
• Include Trim Hoses.
• Includes Trim Switch Panel.
• For 20-30 Ft. Boat Lengths
• Black Standard Color
• White is available as a custom color (may take up to 6 weeks)
• NOTE: In order to complete this system to your Garmin, or other Smartcraft / NMEA2000 compatible screen you must purchase the 137-8659 adapter box.
• NOTE: If not using a Smartcraft / NMEA2000 type screen display above, you must purchase a corresponding Mayfair Indicator System to display the position readout from your trim tabs.

• Made from high strength 535 Aluminum Magnesium alloy.
• All 316 Stainless Steel hardware.
• 1-1/2" Piston bore.
• Two way hydraulics for improved performance.
• Zinc Anodes to prevent corrosion.
• For 20-30 Ft. Boat Lengths
• Includes installation hardware for a 33c cable, for mechanical trim indicator systems.
• Black Standard Color
• White is available as a custom color (may take up to 6 weeks)

• Made from high strength 535 Aluminum Magnesium alloy.
• All 316 Stainless Steel hardware.
• Includes Electronic Sensors for the Mayfair LED Trim Indicator Systems
• 1-1/2" Piston bore.
• Two way hydraulics for improved performance.
• Zinc Anodes to prevent corrosion.
• For 20-30 Ft. Boat Lengths
• Black Standard Color
• White is available as a custom color (may take up to 6 weeks)
• NOTE: In order to complete this system to your Garmin, or other Smartcraft / NMEA2000 compatible screen you must purchase the 137-8659 adapter box.
• NOTE: If not using a Smartcraft / NMEA2000 type screen display above, you must purchase a corresponding Mayfair Indicator System to display the position readout from your trim tabs.

160 Degree Brass Hi-flow Marine Thermostat

These hi-flow brass marine thermostats feature air relief ports. Thisenables relief of the steam pockets caused by cold water entering a heatedengine block. Their hi-flow design helps to maintain a constant operatingtemperature. Don't trust your engine to anything less!

• Marine grade stainless steel & aluminum construction
• 12 DC sealed electric motors, 2-wire simple hook-ups
• Compact Size, Light Weight, for Maximum Lifting Capacity
• Two Standard Length Cylinders with Simple Pin Mounts
• Heavy Duty Aluminum Clevis Mounts for Hatch and Stringer
• Smooth Quiet Responsive Hydraulic Action with No-Coasting
• Moving Capacity 500 lbs. on horizontal surface. Will lift 250lb hatch when mounted vertically.
• 1” Cylinder. 
• System is virtually maintenance free
• Operating Temperatures 10 to 165 Degrees F
• System can Operate with Environmentally Responsible Fluid
• 18" Model  Dimensions: 26” Retracted Length, 44” Extended Length.
• NOTE: The 620-920016 is only bracket kit that will work with this ram. Most Brackets, pins and accelerators sold separately in the section WILL NOT WORK with this actuator. 

180 Degree Brass Hi-flow Marine Thermostat

These hi-flow brass marine thermostats feature air relief ports. Thisenables relief of the steam pockets caused by cold water entering a heatedengine block. Their hi-flow design helps to maintain a constant operatingtemperature. Don't trust your engine to anything less!

1-Piece Gen 4 Oil Pan Gasket- Sold Each

At last the ultimate oil pan gasket is available to match the ultimate oil pan. This one-piece design provides a superior seal with no chance of leaking seams and easy installation. Each gasket utilizes torque limiters to prevent over tightening and each gasket is notched for "stroker" clearance. Designed to seal under extreme crankcase pressure and scorching oil temperature.

Sold Each

1-Piece Gen 5 & 6 Oil Pan Gasket- Sold Each

At last the ultimate oil pan gasket is available to match the ultimate oil pan. This one-piece design provides a superior seal with no chance of leaking seams and easy installation. Each gasket utilizes torque limiters to prevent over tightening. Designed to seal under extreme crankcase pressure and scorching oil temperature.

Sold Each

1-Piece LS Oil Pan Gasket- Sold Each

At last the ultimate oil pan gasket is available to match the ultimate oil pan. This one-piece design provides a superior seal with no chance of leaking seams and easy installation. Each gasket utilizes torque limiters to prevent over tightening and each gasket is notched for "stroker" clearance. Designed to seal under extreme crankcase pressure and scorching oil temperature.

Sold Each

2 Groove "V" Pulley Adaptor, Fits Big Block Chevy

These popular billet v-groove pulleys are designed to aid in driving multiple engine accessories like power steering, alternator, sea pump, etc.

• Dual 1" common inlet, 2x 1" outlets

One of many of Hardin Marines latest cooling innovations in a new two stage sea pump for the popular Mercury Racing HP525, 600SCI, 662SCI, and 700SCI engines. Engine builders have been pleading for a solution to the lack of water that the factory sea pump delivers and Hardin Marine rose to the occasion with the development of this product. Finally an answer to failed headers from water starvation and detonating engines from under supplied intercoolers.

This pump is designed to retrofit to all Mercury Generation 5/6 engines equipped with a sea pump mounted fuel pump. This pump accepts the OEM factory mechanical fuel pumps that are integrated components in the OEM fuel system and provide additional priming support to the factory EFI system. On the supercharged engines this unit is perfect to solve the cooling system short comings of the factory single stage sea water pump system that splits the single water supply to feed the factory intercooler.

Note: Pulley is not included

• Single 1-1/4" outlet common outlet

One of many of Hardin Marines latest cooling innovations in a new two stage sea pump for the popular Mercury Racing HP525, 600SCI, 662SCI, and 700SCI engines. Engine builders have been pleading for a solution to the lack of water that the factory sea pump delivers and Hardin Marine rose to the occasion with the development of this product. Finally an answer to failed headers from water starvation and detonating engines from under supplied intercoolers.

This pump is designed to retrofit to all Mercury Generation 5/6 engines equipped with a sea pump mounted fuel pump. This pump accepts the OEM factory mechanical fuel pumps that are integrated components in the OEM fuel system and provide additional priming support to the factory EFI system. On the supercharged engines this unit is perfect to solve the cooling system short comings of the factory single stage sea water pump system that splits the single water supply to feed the factory intercooler.

Note: Pulley is not included

2 Stage Sea Pump for Gen 4 & 6 Mercury Applications

• Dual 1" common inlet, 2 x 1" outlets

Note: Pulley is not included, image shown is rendering not actual item.

2 Stage Stainless Steel Sea Pump

The dual stage Extreme Sea Pump is the next step in our line of high performance, high volume raw water pumps. Incorporating two individual impellers this pump will double the volume of water delivered to your engine or give you the choice of separate routing to individual engine components. Dual stage pumps are commonly found on high horsepower pleasure boat applications where a dual independent water pump for an an intercooler, exhaust system or oil coolers is advantageous.

Available in either: Billet Aluminum or Stainless Steel, this dual stage sea pump is the key to solving over heating problems.

2 Stage Stainless Steel Sea Pump with 1 Groove Pulley, 1-1/4” NPT Center Inlet & Dual 1” NPT Outlets

The dual stage Extreme Sea Pump is the next step in our line of high performance, high volume raw water pumps. Incorporating two individual impellers this pump will double the volume of water delivered to your engine or give you the choice of separate routing to individual engine components. Dual stage pumps are commonly found on high horsepower pleasure boat applications where a dual independent water pump for an an intercooler, exhaust system or oil coolers is advantageous.

Available in either: Billet Aluminum or Stainless Steel, this dual stage sea pump is the key to solving over heating problems.

2 Stage Stainless Steel Sea Pump with 1 Groove Pulley, 1-1/4” NPT Center Inlet/Outlet

The dual stage Extreme Sea Pump is the next step in our line of high performance, high volume raw water pumps. Incorporating two individual impellers this pump will double the volume of water delivered to your engine or give you the choice of separate routing to individual engine components. Dual stage pumps are commonly found on high horsepower pleasure boat applications where a dual independent water pump for an an intercooler, exhaust system or oil coolers is advantageous.

Available in either: Billet Aluminum or Stainless Steel, this dual stage sea pump is the key to solving over heating problems.

2 Stage Stainless Steel Sea Pump with 2 Groove Pulley, 1-/4” NPT Center Inlet/Outlet

The dual stage Extreme Sea Pump is the next step in our line of high performance, high volume raw water pumps. Incorporating two individual impellers this pump will double the volume of water delivered to your engine or give you the choice of separate routing to individual engine components. Dual stage pumps are commonly found on high horsepower pleasure boat applications where a dual independent water pump for an an intercooler, exhaust system or oil coolers is advantageous.

Available in either: Billet Aluminum or Stainless Steel, this dual stage sea pump is the key to solving over heating problems.

2 Stage Stainless Steel Sea Pump with 2 Groove Pulley, 1-/4” NPT Center Inlet & Dual 1” NPT Outlets

The dual stage Extreme Sea Pump is the next step in our line of high performance, high volume raw water pumps. Incorporating two individual impellers this pump will double the volume of water delivered to your engine or give you the choice of separate routing to individual engine components. Dual stage pumps are commonly found on high horsepower pleasure boat applications where a dual independent water pump for an an intercooler, exhaust system or oil coolers is advantageous.

Available in either: Billet Aluminum or Stainless Steel, this dual stage sea pump is the key to solving over heating problems.

2" Aluminum Flush Style Fuel Fill

These great looking fuel fills are extremely low profile. Each cap features unique finger grips on the perimeter of the cap allowing easy removal and installation. All mounting hardware is covered when the cap is installed.

Each cap features :
• an O-ring seal
• a 2" hose connection
• and is vented.

Height 2-3/16" x Width 3-1/2" Overall, Inner Dia. 1-15/16", Outer Dia. 2"

See what each of our powder-coated finishes (both flat and glossy) look like under different lighting here!

2" Billet Flip Lid Fuel Fill

These low profile style billet fuel fills use an integrated flip-up style lid that aids in opening and closing the fuel fill. The cap is threaded and screwed into the inner flange covering all mounting hardware. Each cap is vented with a small drilled hole and features an O-ring seal and a 2" hose connection. The vent hole is threaded and can be plugged with a pipe plug (not included) if desired.

Height 2-1/2" x Width 3-1/2" Overall, Inner dia. 1-5/8", Hose Dia. 2"

See what each of our powder-coated finishes (both flat and glossy) look like under different lighting here!

2" Black Anodized Billet Oil Cooler Bracket with O-ring Cushion (Oil Pan Mount), Includes Mounting Bolt.