Hardin Marine

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.

Chrome Plated Engine Dipstick & Tube - Olds 455

A beautifully chrome plated dipstick to add the finishing touch to mostengine applications.  If you are ordering a new pan, don't forget a newdipstick.

Chrome Plated Small Block Chevy - Block Mounted Dipstick

These dipsticks are beautifully chrome plated to add the finishing touch to most engine applications.  If you are ordering a new pan, don't forget a new dipstick.

Chrome Steel Big Block Chevy Fuel Pump Block Off Plate

This heavy duty fuel pump block off can be used to block off the engine mounted mechanical fuel pump or Gen 5/6 Mercury sea pump / fuel pump pad when converting to an electric fuel pump.

Chrome Twist-in Oil Cap

These chrome plated oil caps use two tabs to register into valve covers equipped with two slots. These caps twist-in to provide a secure seal.

• Constructed of 316L stainless steel and billet aluminum water crossover.
• Offers a optional cooling system bypass port as well as a single inlet.
• No pulley included.
• Kits available for all popular HP Mercury engines including the 500, 525, 600, and 700's.
• O-ring sealed, no gaskets required.
• Includes mounting bolts.
• Multiple plumbing options from three 1" NPT ports.
• Includes one 1" NPT x 1-1/4" Hose fitting and two 1" NPT pipe plugs.
• Allows for the removal of the factory power robbing circulating pump.

Classic Bucket Seat

This version of the Premier seating line is easily recognized as the "Classic". These seats have long been the choice of boat builders for many years. Each seat features a rounded contour with a removable bottom cushion. The Classic can be constructed using your choice of three mixed and matched colors along with your choice of piping color. It is hard to tell whites on a computer. The Beach White has a gray tint to it. The cloud has a hint of pink to it. Snow white is very white. Gel White has a hint of tan & Shell white has even more of a tan tint. These seats are built to order, allow 4-6 weeks manufacturing time. Priced per seat / Sold Each.

Dimensions: 20-1/2" Tall, 22" Wide, 22" Deep

• Classic look gauge for the old school look
• Hardin Marine gauges come with white light

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!

Clear Anodized Billet Manual Fuel Valve Assembly

At last a fuel valve you're not trying to hide. This clear anodized billet fuel valve is something everyone would be proud to own. 1/2 NPT Ports. It has left tank, right tank, both tanks, and off for setting. Measures 2-3/4" X 2-3/4" X 2-1/4" deep

Note: This valve is not USCG approved.

Combination Engine Oil & Power Steering Or Transmission Cooler, 2" Diameter, 19" Overall Length, 3/8" NPT P/S and 3/4" NPT Oil Connections, 1-1/4" Water Connection

All the same features as our other coolers except it is designed as a MerCruiser replacement cooler for the most common V8 engines. The only noticeable difference is the use of 3/4" NPT oil connections providing a higher volume flow capacity.

Note: Never use small than a 3/4" NPT oil connection on engine coolers.

Combination Engine Oil & Power Steering Or Transmission Cooler, 2" Diameter, 18" Length, 3/8" NPT P/S and 3/4" NPT Oil Connections, 1" NPT Water Connection

All the same features as our other coolers except it is designed as a MerCruiser replacement cooler for the most common V8 engines.  The only noticeable difference is the use of 3/4" NPT oil connections providing a higher volume flow capacity.

Note:  Never use small than a 3/4" NPT oil connection on enginecoolers.

Competition Marine™ Seal Cylinder Head Gasket - Big Block Chevy Gen 4, 4.625 Bore- Sold Each

Multi-layer gasket technology has long been a hidden SECRET of the professional ranking Indy and NASCAR racing engine builders. This technology offers advantages not available from any other forms of gasket design. The increased demand for more power has caused increased combustion temperatures, movement between heads and engine blocks under extreme cylinder pressure. By using "multi-layer" technology individual sealing sheets withstand engine loads that until now were never capable of containing. If the very best possible gasket is what your looking for settle for nothing less than "multi-layer" technology.

• More resistant to thermal expansion
• The best combustion seal anywhere
• Strategically embossed sealing paths
• Primary stainless steel sealing sheet

With over 40 years of marine engine manufacturing experience under our belts, building high performance and original equipment engines has provided us the insight needed to develop what today is considered to be the marine industries finest gaskets available today. Dependability and durability in both fresh water and harsh salt water environments. Marine engines operate inconditions far more severe than their automotive counterparts from cool water rushing in against scalding hot cylinder walls to exhaust temperatures exceeding 2,000 degrees Fahrenheit. Rest assured each Hardin Marine seal and Xtreme Marine Seal gasket was designed for its specific purpose. While marine seal gaskets are the perfect choice for an OEM application the Xtreme Seal gaskets are strong enough to be chosen by the world's leading offshore engine manufacturers.

SOLD EACH!

Complete Jet Pump Repair Tool Kit

This kit is great for the do-it-yourselfer or the pro repair shop. Kit includes heavy duty impeller puller, pump seal drivers, splined shaft socket and impeller nut socket. Do the job the easy way "with the right tool for the job!"

Kit Includes:

• Impeller Puller 950-758100
• Bowl Bushing Driver 950-758200
• Suction Seal Driver 950-758300
• Bowl Seal Driver 950-758400
• Bearing Cap Seal Driver 950-758500
• Interchangeable Driver Shaft 950-758600
• Splined Shaft Pump Socket 950-758800
• Jet Impeller Nut Socket 950-758900

Complete Lid Assembly, Swirl Away High Performance Sea Strainer, 1/2"

This is a 1/2" hole replacement Complete Sea Strainer Lid Assembly. This clear-view lid allows unrestricted visual inspection. Designed to fit Swirl Away Series Strainers.

• Complete Replacement Trim Pump 
• 12V 3-Wire Pump Used On Mercruiser Speedmaster Drives
• High Pressure For Race Application
• No Bracket Included
• Made in USA, Parker Hannifin built pumps manufactured to factory specs
• Uses 10w30 oil
• Replaces OEM Mercruiser # 8M0051203

• Complete Replacement Trim Pump
• 12V 3-Wire Pump For Late Model Mercruiser Stern Drives
• No Bracket Included
• -4 Inverted Flare Fittings

• Complete Replacement Trim Pump 
• 12V 3-Wire Pump Used On Mercruiser K-Planes
• High Pressure For Race Application
• No Bracket Included
• Uses 10w30 oil

Complete Sea Pump Front Snout Housing Assembly - For Gen. 5/6 Hardin Stainless Pumps - Mercury Replacement

This Sea Pump Snout Housing is for the Hardin Marine stainless pump 625-4118. It includes housing, shaft, seals, bearings, plugs, snap rings, bolt and copper washer.

Computer Re-Calibration & Monitoring (ECU) - Non Supercharged Engines

Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, or added a supercharger?

Hardin Marine can recalibrate your Mercury ECU (computer) to yield the very most of your engines power The ECU precisely controls fuel requirements, detonation control, idle speed and RPM limitations We have dyno-tested multiple combinations and know what works! Call us with your application requirements and we will lead you to maximum horsepower from you EFI engine Allow approximately 4-7 days turn around time.

***Results will vary depending on boat design, propping, atmospheric conditions, environment and drivers. We cannot guarantee speed or plane time increases with the many different applications. MPH and power increase % are helpful rules of thumbs and are in no way guaranteed.

*** We Do not offer any outboard tuning options***

Computer Re-Calibration & Monitoring (ECU) - Supercharged Engines

Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, or added a supercharger?

Hardin Marine can recalibrate your Mercury ECU (computer) to yield the very most of your engines power The ECU precisely controls fuel requirements, detonation control, idle speed and RPM limitations We have dyno-tested multiple combinations and know what works! Call us with your application requirements and we will lead you to maximum horsepower from you EFI engine Allow approximately 4-7 days turn around time.

***Results will vary depending on boat design, propping, atmospheric conditions, environment and drivers. We cannot guarantee speed or plane time increases with the many different applications. MPH and power increase % are helpful rules of thumbs and are in no way guaranteed.

Copperseal Exhaust Manifold Gaskets - Big Block Chevy Round Port- Sold in Pairs

Copperseal is the perfect for solving problems caused by uneven mating surfaces or warped flanges. Embossed raised seals fit perfectly to the exhaust ports. The resistance to high temperature and high pressure make the gaskets the ultimate choice for all applications. .04" thick.

Sold in Pairs