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Marine Design Corp

Marine Design Corp

We carry a full line of MDC Damper Plates and DriveSync's for Marine applications.

HD Bravo Output Shaft Mercury #939064
Your Price:
$1,099.99

HD Bravo Output Shaft Mercury #939064

221-939064

This is a direct replacement for the flanged shaft inside the bell housing for a driveline setup with a Bravo drive. They are made from 4340 chromoly and actually weigh 7.7 ounces heavier than the stock ones even though they are exactly the same dimensions. Made in the USA.


IAC Survival Kit
Your Price:
$299.99

IAC Survival Kit

221-1090

The Marine Design Corporation IAC Survival Kit is designed specifically for Mercury Racing 600SCi, 662SCi and 700SCi engines. Our kit eliminates costly PCM damage that can occur when an IAC fails, which can be a common occurance. The kit was developed for twin engine applications and includes two plug-and-play IAC harnesses that are fused to prevent a direct short to the PCM. Also included are two USA made IAC units with gaskets, hardware, (just in case you drop one in the bilge) spare fuses and a canvas storage pouch. Replacement IACs and fuses are also available.


DriveSync, Dual Drives, Race Edition, 3 Wires
Starting From:
$1,195.00
This Part has options, please click the button below to order.

TrimSync Race Edition - Trim Monitoring and Alignment System

221- + Option(s)

TrimSync Race Edition+ includes all of the standard TrimSync features AND allows the user to program up to four preset positions that can be recalled with the push of a button. Typically, one preset would be the highest you would ever want to safely trim at speed. Another might be 2°-3° below neutral for when you encounter a wave. Race Edition+ allows you to quickly and safely trim to your “sweet spot” without having to watch the trim indicators or worry about over-trimming at high speeds.

TrimSync Race Edition is also available for trim tab / tunnel tab combinations, which greatly reduces the complexity of coordinating the position of each separately. With up to four presets the user can move the drives and tabs in unison to their individual pre-programmed positions, with a single push of a button. Of course, all presets can be easily overridden by simply pressing any other trim button, just as you would normally do.

NOTE: Please specify when ordering if using Mercury Racing Engines.


DriveSync, Dual Drives
Starting From:
$895.99
This Part has options, please click the button below to order.

TrimSync - Trim Monitoring and Alignment System

221-10 + Option(s)

Operating a multi-engine offshore powerboat can be a little overwhelming at times.  That’s probably why offshore racing is the only motorsport that requires two drivers. Most offshore boats have an engine trim button built into the throttle lever handle.  We all know that the drives rarely stay perfectly even using just the BOTH button on the throttles.  Having them offset can impact handling, and can be dangerous at high speeds.  So that after a couple of moves we are all reaching to the dash to try and even them out.  Over and over again.

TrimSync is a patent pending device that monitors the trim for twin and triple engine boats, so when the operator presses the BOTH/ALL button, it will automatically adjust the drives to be in perfect alignment, every time.  You will never have to worry about how accurate your mechanical trim indicators are because TrimSync will always move the slowest drive to match the others.  There are no extra buttons or complicated operating instructions, just push the BOTH button and TrimSync does the rest.

If, for some reason, you want one drive to be at a different trim then push that drive’s trim button and it will move just as it always has. TrimSync will re-align the drive trim the next time you push the BOTH button. Just drive!

NOTE: Please specify when ordering if using Mercury Racing Engines.


NMEA 2000 Software Upgrade For TrimSync
Your Price:
$499.99

NMEA 2000 Software Upgrade For TrimSync

221-1041

NMEA 2000 Software Upgrade For TrimSync

We will upgrade your TrimSync system to NMEA 2000 compatible specifications. Enjoy advanced NMEA 2000 devices and interconnectivity. 

Not Required on Smartcraft equpped boats. 


Note: Must Be Purchased With A TrimSync Product Or Kit

TrimSync - Automatic Engine Offset Add On
Your Price:
$249.00

TrimSync - Automatic Engine Offset Add On

221-1098

TrimSync - Automatic Engine Offset Add On

Upgrade your TrimSync system for Automatic engine offset.

Note: Must Be Purchased With A TrimSync Product Or Kit


Shift Controller
Your Price:
$2,495.99

Shift Controller

221-1085

Shift Controller

 

MDC has recently announced a new product to reduce the stress of docking a boat equipped with an SCS Crashbox. As we all know, docking with a Crashbox can be extremely difficult, even in the best wind and water conditions, requiring engine shut off between shifting gears and getting the gears to mesh before restarting the engine. Now MDC has eliminated the headache with shift-by-wire technology that does it all automatically and eliminates the stress of docking with a Crashbox.
MDC’s Crashbox Shift Controller uses our custom-built ECM to drive a CAN Bus actuator that is connected to the Crashbox using a standard shift cable. The ECM manages the shutdown, starter bump (if required) and restart of the engine, just like you would do manually but much, much faster.

Shift Control manages the entire shifting process so you can focus on driving the boat. When a shift is requested, the ECM disables the ignition and moves the actuator simultaneously. If the gears don’t mesh, then the ECM will bump the starter until they do and then immediately enable the ignition and activate the starter to restart the engine. The entire process is much faster than is possible when shifting manually.

The system can be installed in parallel with your existing shift levers by having a push button at the helm for each gear. Shift Control will actually move the shift lever when a shift is requested. You can always override it and shift manually, or, you can eliminate the shift cable running to the helm by using levers that are equipped with position switches, as most brands allow.

The installation of MDC’s Crashbox Shift Controller is straightforward and does not require any modifications to the engine or it’s position in the boat. The system is compatible with any currently installed engine / Crashbox combination.

With MDC’s Crashbox Shift Control you can have the peace of mind and reliability of the nearly indestructible SCS Crashbox with shift-by-wire control for easier docking and maneuvering.

DriveGaurdian Kit, NXT Damper Plate/DriveGaurd
Your Price:
$2,299.99

DriveGuardian Combo Kit, NXT Damper Plate / DriveGuard

221-100

DriveGuardian Kit, NXT Damper Plate/DriveGuard

Direct replacement for the factory NXT damper plate with a 1.375” shaft that has 26 splines. Heavy duty design with 8 springs and a solid backing plate that can withstand more torque than the OEM units.

DriveGuardian NXT is a patented device that improves the reliability of your NXT transmissions and drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. These torque spikes far exceed the manufacturer’s torque rating for the NXT transmission and drive, which can lead to broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.

This is a Packaged Price Deal


DriveGuardian NXT
Your Price:
$1,995.99

DriveGuardian NXT

221-1030

DriveGuardian NXT

DriveGuardian NXT is a patented device that improves the reliability of your NXT transmissions and drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. These torque spikes far exceed the manufacturer’s torque rating for the NXT transmission and drive, which can lead to broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.

Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.

DriveGuardian is manufactured using billet aluminum housings and Kevlar clutch plates. The clutch plates are replaceable and the typical rebuild interval for an offshore performance application is 500-600 hours. DriveGuardian NXT retains the OEM damper plate and is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.

Make sure to fill out this calibration questionnaire when ordering.


DriveGuardian SCS Crashbox
Your Price:
$2,995.99

DriveGuardian SCS Crashbox

221-1035

DriveGuardian SCS Crashbox, Top Mount Starter

DriveGuardian SCS is a patented device that improves the reliability of your drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. While the SCS Crashbox has been proven to be nearly indestructible but these torque spikes can easily exceed the ratings of your drive and lead to broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World offshore powerboat racing Championships.

Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.

DriveGuardian is manufactured using billet aluminum housings, Kevlar clutch plates and include a heavy duty 8-spring damper plate. DriveGuardian replaces the factory flywheel and damper plate assembly and is available for either top or bottom mount starters. Standard units are neutral balance for crankshafts with two-piece rear main seals. Other combinations are available upon request. Installation is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.

Make sure to fill out this calibration questionnaire when ordering.


DriveGuardian SSM, Borg
Starting From:
$2,995.99
This Part has options, please click the button below to order.

DriveGuardian SSM, Borg

221-102 + Option(s)

SSM Borg Warner 1.375 x 26

DriveGuardian SSM is a patented device that improves the reliability of your transmissions and drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. These torque spikes can easily exceed the ratings of your drivetrain components and lead to overheated transmissions, broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.

Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.

DriveGuardian is manufactured using billet aluminum housings, Kevlar clutch plates and include a heavy duty 8-spring damper plate. DriveGuardian replaces the factory flywheel and damper plate assembly and is available for either top or bottom mount starters. Standard units are neutral balance for crankshafts with two-piece rear main seals. Other combinations are available upon request. Installation is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.

Top or Bottom Mount Available

Make sure to fill out this calibration questionnaire when ordering.


DriveGuardian, Bravo
Your Price:
$2,495.99

DriveGuardian, Bravo

221-1015

Replaces Stock Coupler

DriveGuardian is a patented device that reduces the leading cause of pitted/broken gears and twisted shafts in Bravo sterndrives. DriveGuardian replaces the factory Bravo rubber coupler with a multi-plate torque-limiting clutch that is calibrated to your specific application. The cause of many gear and shaft failures is the enormous torque spike that is generated each time the propeller either partially or fully leaves the water, and then is re-submerged. These spikes are generated by the inertia of the rotating engine components and can be 2X-4X the actual torque output of the engine. Each spike lasts only a fraction of a second and throttling alone cannot eliminate them. Every spike causes stress to the gears and shafts which greatly reduces their usable life.

DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.

Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.

DriveGuardian is manufactured with billet aluminum housings and Kevlar clutch plates. DriveGuardian replaces the stock rubber coupler and installation is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.

Make sure to fill out this calibration questionnaire when ordering.


Heavy Duty Crashbox Damper Plate
Your Price:
$499.99

Heavy Duty Crashbox Damper Plate

221-1005

Heavy Duty Crashbox Damper Plate

  • 13-1/2 outside diameter mounting plate.
  • plate is .100 thick.
  • smaller bolt pattern: (8) 3/8 holes on 9" bolt circle
  • larger bolt pattern: (12) 3/8 holes on 12-5/8 bolt circle
  • part is 1-1/2 overall thickness
  • 2" x 10 Spline

Heavy Duty damper plate with eight cryo-treated springs and chrome moly backing plate. Built to withstand the extreme HP and torque of today’s high performance engines.


Heavy Duty NXT Damper Plate
Your Price:
$499.99

Heavy Duty NXT Damper Plate

221-1010

Heavy Duty NXT Damper Plate

NXT direct replacement Hi-Performance drive plate rated for 2,000 ft-lbs Chromoly hubs and Cryo treated springs.