See us on:
Visit CP on Facebook Visit CP on Twitter Visit CP on YouTube
Is your boat in the gallery?
Image Gallery  
Instructions & Guides:
Instructions  
Find Parts by Mercury Model:
OEM Part Finder  
What's on sale today?
Sale Specials  
What are you looking for Today?

Need Help? Call Us:

1-800-225-9871

Outside the USA? Call 707-585-9871

Outdrive - Mercury

Computer Re-Calibration & Monitoring (ECU) - Non Supercharged Engine
Your Price:
$375.00

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

620-75302

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.


Computer Re-Calibration & Monitoring (ECU) - Supercharged Engines
Your Price:
$425.00

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

620-75303

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.


Computer Re-Calibration & Monitoring (ECU) - Non Supercharged Engine
Your Price:
$1,750.00

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO Supercharged Engine

620-75310

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO Supercharged Engines

Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, oradded 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.


Computer Re-Calibration & Monitoring (ECU) - Non Supercharged Engine
Your Price:
$950.00

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO, 525 Non Supercharged Engine

620-75309

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO, 525 Non Supercharged Engines

Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, oradded 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.


Max Volt Catalyst Eliminator Computer
Starting From:
$459.99
This Part has options, please click the button below to order.

Max Volt Catalyst Eliminator Computer

121-120 + Option(s)

Max Volt Catalyst Eliminator Computer

If increased engine performance is what you are after but have concerns about the catalyst equipment on your engine, then the Catalytic Eliminator Computer (CEC) is what you need! Designed specifically for marine engines, Maxvolt Performance worked with a team of marine electrical engineers to create a product this simple and gets the job done. There is no cutting or splicing of wires; everything is plug and play! And there are three ways to play! Your engine can be Aggressive,Mild, or Basic:

Aggressive: If you want to be aggressive and replace your stock exhaust system with a header system, then this is the product for you. We worked with the header design teams at Hardin Marine and other popular manufacturers to be sure their headers are manufactured to work with CEC. To be compatible, the header must be made to accept a pre-oxygen sensor!

Mild:If changing over to headers is too aggressive for you, then removing the catalysts but retaining the stock exhaust manifolds is the path for you. Depending on the engine, 10 to 15 horsepower will be gained by removing the catalysts and using the factory exhaust system.

Basic:If your boat has fouled its post oxygen sensors and is no longer under the factory warranty, then you know what it costs to have new sensors installed and the trouble codes cleared. For less than what your dealer charged, you can purchase and install the CEC and never have to worry about throwing that fault code again!

Note:
  • Only works with the 4 pin plug switching style O2 sensors.
  • Will not work on the newer wide band O2 sensors with 6 pin plugs.

WARNING! This module is not to be used on emissions regulated waterways. The intent of this module is to allow the running of a catalyzed marine engine without the catalytic converters installed and without triggering any ECU error codes. With the engine operating in this condition, the emissions control system will be rendered inoperative. For this reason, do not operate the vessel on emissions regulated waterways. This computer system is not legal for any purpose other than testing purposes and not for use on any state or federal waterway.

Outdrive Gasket Set
Your Price:
$4.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Outdrive Gasket Set

676-18-2614

Additional Details:

  • Fits: MC-I drives (s/n 6225576 & Below) (1967-1982)

Interchanges/Replaces

GLM

  • 39590

Mallory

  • 9-62602
  • 9-62602-25

Mercruiser Stern Drive

  • 27-45821
  • 27-64818
  • 27-64818A1
  • 27-64818A20
  • 27-64818A4
  • 27-64818Q4
  • 27-64818T4

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2820Mercruiser Stern Drive
  • 27-45821
  • 27-64818
  • 27-64818A1
  • 27-64818A20
  • 27-64818A4
  • 27-64818Q4
1Outdrive Gasket N/A
18-2840GLM
  • 31160
Mercruiser Stern Drive
  • 27-35982
1Bell Housing Gasket N/A
18-7153GLM
  • 81180
Mallory
  • 9-76505
Mercruiser Stern Drive
  • 25-25439
Mercury Marine
  • 25-25439
Mercury Race Outboard
  • 25-25439
Mercury Race Sterndrive
  • 25-25439
OMC Stern Drive
  • 3852565
  • 911851
Volvo Penta
  • 3852565
  • 997368
2O-Ring N/A
18-7170Chrysler/Force/US Marine
  • 25-33504
GLM
  • 82200
Johnson/Evinrude Outboard
  • 307239
Mallory
  • 9-76502
Mercruiser Stern Drive
  • 25-33504
Mercury Marine
  • 25-33504
OMC Stern Drive
  • 307239
  • 3852071
Volvo Penta
  • 3852071
1O-Ring N/A

Outdrive Gasket Set
Your Price:
$7.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Outdrive Gasket Set

676-18-2617

Additional Details:

  • Fits: IA/IB/IC & EZ Shift (1964-1966)

Interchanges/Replaces

Mallory

  • 9-62603

Mercruiser Stern Drive

  • 27-35996
  • 27-35996A1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2556Mercruiser Stern Drive
  • 27-35996
  • 27-35996A1
1Drive Shaft Housing to Bell Housing Gasket N/A
18-2840GLM
  • 31160
Mercruiser Stern Drive
  • 27-35982
1Bell Housing Gasket N/A
18-7153GLM
  • 81180
Mallory
  • 9-76505
Mercruiser Stern Drive
  • 25-25439
Mercury Marine
  • 25-25439
Mercury Race Outboard
  • 25-25439
Mercury Race Sterndrive
  • 25-25439
OMC Stern Drive
  • 3852565
  • 911851
Volvo Penta
  • 3852565
  • 997368
2O-Ring
18-7170Chrysler/Force/US Marine
  • 25-33504
GLM
  • 82200
Johnson/Evinrude Outboard
  • 307239
Mallory
  • 9-76502
Mercruiser Stern Drive
  • 25-33504
Mercury Marine
  • 25-33504
OMC Stern Drive
  • 307239
  • 3852071
Volvo Penta
  • 3852071
1O-Ring N/A

Outdrive Gasket Set
Your Price:
$4.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Outdrive Gasket Set

676-18-2615

Additional Details:

  • Fits: Bravo drives

Interchanges/Replaces

GLM

  • 39640

Mallory

  • 9-62604

Mercruiser Stern Drive

  • 16755
  • 16755A1
  • 16755Q1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2516GLM
  • 86310
Mallory
  • 9-76503
Mercruiser Stern Drive
  • 16755
  • 16755A1
  • 16755Q1
1Outdrive Seal N/A
18-7105GLM
  • 80180
Johnson/Evinrude Outboard
  • 311338
Mallory
  • 9-76506
Mercruiser Stern Drive
  • 25-62705
  • 25-F748342
Mercury Marine
  • 25-62705
1O-Ring N/A
18-7117GLM
  • 82150
Johnson/Evinrude Outboard
  • 303360
Mallory
  • 9-76507
Mercruiser Stern Drive
  • 25-35027
Mercury Marine
  • 25-35027
1O-Ring N/A
18-7153GLM
  • 81180
Mallory
  • 9-76505
Mercruiser Stern Drive
  • 25-25439
Mercury Marine
  • 25-25439
Mercury Race Outboard
  • 25-25439
Mercury Race Sterndrive
  • 25-25439
OMC Stern Drive
  • 3852565
  • 911851
Volvo Penta
  • 3852565
  • 997368
2O-Ring N/A
18-7168GLM
  • 80120
Johnson/Evinrude Outboard
  • 202893
Mallory
  • 9-76550
Mercruiser Stern Drive
  • 25-21720
  • 25-26834
  • 25-48171
  • 25-801334436
Mercury Marine
  • 25-20587
  • 25-21720
  • 25-26834
  • 25-48171
  • 25-801334436
OMC Stern Drive
  • 202893
  • 3852033
Volvo Penta
  • 3852033
2O-Ring N/A
18-7198Chrysler/Force/US Marine
  • 25-45710
GLM
  • 81270
Honda Outboard
  • 91353-ZW1-003
Mallory
  • 9-76504
Mercruiser Stern Drive
  • 25-45710
  • 25-457101
Mercury Marine
  • 25-45710
  • 25-457101
OMC Stern Drive
  • 308626
1O-Ring N/A

Outdrive Gasket Set (Display Pack)
Your Price:
$6.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Outdrive Gasket Set (Display Pack)

676-18-2619-1

Additional Details:

  • Fits: R, MR, Alpha One & Gen II drives (s/n 6225577 & Up) (1983 & Up)

Interchanges/Replaces

GLM

  • 39620

Mallory

  • 9-62601
  • 9-62601-25

Mercruiser Stern Drive

  • 27-64818A2
  • 27-64818A3
  • 27-94996
  • 27-949962
  • 27-94996A1
  • 27-94996A2
  • 27-94996Q2

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2743GLM
  • 31141
Mallory
  • 9-61012
Mercruiser Stern Drive
  • 27-94996
  • 27-949962
  • 27-94996A20
1Outdrive Mounting Gasket N/A
18-2840GLM
  • 31160
Mercruiser Stern Drive
  • 27-35982
1Bell Housing Gasket N/A
18-7117GLM
  • 82150
Johnson/Evinrude Outboard
  • 303360
Mallory
  • 9-76507
Mercruiser Stern Drive
  • 25-35027
Mercury Marine
  • 25-35027
1O-Ring N/A
18-7153GLM
  • 81180
Mallory
  • 9-76505
Mercruiser Stern Drive
  • 25-25439
Mercury Marine
  • 25-25439
Mercury Race Outboard
  • 25-25439
Mercury Race Sterndrive
  • 25-25439
OMC Stern Drive
  • 3852565
  • 911851
Volvo Penta
  • 3852565
  • 997368
2O-Ring
18-7170Chrysler/Force/US Marine
  • 25-33504
GLM
  • 82200
Johnson/Evinrude Outboard
  • 307239
Mallory
  • 9-76502
Mercruiser Stern Drive
  • 25-33504
Mercury Marine
  • 25-33504
OMC Stern Drive
  • 307239
  • 3852071
Volvo Penta
  • 3852071
1O-Ring N/A