Oil Coolers - Tube & Box Style Oil Coolers

Oil Cooler - 2" Diameter, 9" Overall Length, 1-1/4" Hose Connection

• 3/8" NPT oil connections
• 1/8" NPT drain
• Operating pressure of up to 150 PSI.
• Replaces Mr Cool MRC205EE-05, Seakamp 25134, R&D Enterprises RD205EE-05, Sen-Dure 1125-12-S

Oil Cooler - 2" Diameter, 8" Length, 3/4" NPT Connection

This cooler features thirty-one 1/4" cooling tubes with displacement baffles.  It also has 3/8" NPT oil connections with an 1/8" NPT drain.  Operating pressure of up to 150 PSI.  Designed for powersteering or transmission applications.

Oil Cooler - 2" Diameter, 8" Length, 1" NPT Connection

This cooler features thirty-one 1/4" cooling tubes with displacement baffles. It also has 3/8" NPT oil connections with an 1/8" NPT drain. Operating pressure of up to 150 PSI. Designed for power steering or transmission applications.

Oil Cooler - 2" Diameter, 16" Overall Length, 1-1/4" Hose Connection

Featuring thirty-one 1/4" cooling tubes with displacement baffles! Large 3/4" NPT oil connections for increased flow with an 1/8" NPT drain. Rated operating pressure up to 150 PSI. Recommended for engines up to 425 horsepower.

Oil Cooler - 2" Diameter, 16 Overall Length, 3/4" NPT Connection for Water and Oil

Featuring thirty-one 1/4" cooling tubes with displacement baffles! Large 3/4" NPT water and oil connections for increased flow with an 1/8" NPT drain. Rated operating pressure up to 150 PSI. Recommended for engines up to 425 horsepower.

Oil Cooler - 2" Diameter, 16" Overall Length, 1" NPT Connection

Featuring thirty-one 1/4" cooling tubes with displacement baffles! Large 1" NPT oil connections for increased flow with an 1/8" NPT drain. Rated operating pressure up to 150 PSI. Recommended for engines up to 425 horsepower.

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.

Hi-Performance Engine Oil Cooler, 3" Diameter, 16" Overall Length, 3/4" NPT Oil Connections, 1" NPT Water Connection

Designed for engines making 450 to 750 horsepower.  These units have seventy-six 1/4" seamless tubes - over double that of a 2" cooler.  The cooler incorporates cast end caps, NO cheap press-formed caps are used.  Operating pressure up to 150 PSI.  This is the cooler all others try to imitate but can never duplicate.  Compare features and you will demand Hardin Marine oil coolers.

Dimensions:
• Overall Length: 20-1/2"
• Tube Length: 16-1/2"
• Diameter: 3"
• Oil Connection: 3/4" NPT
• Water Connection: 1" NPT
• Drain: 1/8" NPT

High performance oil cooler designed for engines 450 to 750 horsepower. These units have seventy-six 1/4" seamless tubes and operate at 150 psi.

Dimensions:
• Overall Length: 25"
• Tube Length: 21"
• Diameter: 3"
• Oil Connection: 3/4" NPT
• Water Connection: 1" NPT
• Drain: 9/16" NPT

High performance oil cooler designed for engines making 550 HP to 1000 HP. These units have seventy-six 1/4" seamless tubes and operate at 150 psi.

Have you made some performance modifications and you're now making mega horsepower only to find out your stock Mercury cooler can't keep up? Well not only is this our most popular combination cooler, it is also the answer to getting those oil temperatures back down where they belong. This cooler features seventy-six 1/4" seamless cooling tubes and can handle form 450 to 750 horsepower applications with ease. With a 23" overall length, 3/4" NPT oil connections, 3/8" NPT P/S connections, and 1" NPT water connections, this is the perfect solution.

Multi-Plate Race Style Oil Cooler Assembly - 8 Plate Remote Oil Cooler Assembly

This multi-plate design oil cooler assembly is used in virtually every sever 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 15 plate oil cooler design offers maximum heat dissipation in the most compact size and use of available space. This basically the same cooler package that's incorporated into a dual cooler style race bellhousing. Now you can have the same great cooling features in a remote mountable cooler. The cast aluminum housing features a hard anodized finish for corrosion resistance. Each housing has 1" NPT water inlets and outlets plus a dual-bolt mounting flange and will accept a 8,13 or 15 plate cooler assembly when used with the appropriate cover assembly. 8 Plate Cooler rated up to 900 HP.

Length 11-3/4", Height 5", and depth based on the 8 plate configuration is 4-3/8".

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".

15 Plate Stainless Steel Oil Cooler with Billet Aluminum Mercury Style Cover for Bravo Applicaiton

These oil coolers, covers, and kits are required for use when a plate style oil cooler is used with a Hardin Marine or Mercury Racing flywheel housing. We offer multiple styles in both cast 356-T6 aluminum or 6061-T6 billet aluminum. Each cover is hard anodized for corrosion resistance.

Once again these kits are designed for your ordering convenience. Each kit consists of a single oil cooler, billet jam nuts, bolts and gaskets.

All of our bravo box style coolers an d remote style boxed coolers use a replacement gasket part #625-8018

Multi-Plate Race Style Oil Cooler Box Housing - NO COOLER ELEMENT

This multi-plate design oil cooler housing assembly is used in virtually every sever 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. This basically the same cooler package that's incorporated into a dual cooler style race bellhousing. Now you can have the same great cooling features in a remote mountable cooler. The cast aluminum housing features a hard anodized finish for corrosion resistance. Each housing has 1" NPT water inlets and outlets plus a dual-bolt mounting flange and will accept a 8,13 or 15 plate cooler assembly when used with the appropriate cover assembly.

Length 11-3/4", Height 5", and depth based on the 8 plate configuration is 4-3/8".

3/4" NPT Cooler Nut

At last an answer to the restriction problem commonly caused by pipe thread style fittings with a plate style cooler. Sold Each.

Billet High Flow -12 AN Cooler Jam Nut/Adapter Fitting

At last an answer to the restriction problem commonly caused by pipe threadstyle fittings with a plate style cooler. A standard pipe thread fittinguses the internal threads of the cooler while drastically reducing the orificesize severely limiting flow and volume.

These new billet AN adapter cooler fittings provide two distinctfeatures. First these fittings attach to the external threads of thecoolers inlet and outlets providing 100% unrestricted oil flow and secondly theytake the place of the steel locking jam nuts providing a positive o-ring sealeliminating those old leaking corroded steel nuts.

Sold each.

O-Ring Reseal Kit

Replacement O-Ring kit for all Olsen 260-OC Series Oil Coolers