Flywheels, Flexplates & Damper Plates - Drive Couplers

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.


COUPLER ASSY Mercruiser 861523A9
Your Price:
$586.50

HP Bravo Drive Coupler 8M0098795, 861523A9

530-8M0098795

Mercruiser HP Bravo Drive Coupler 8M0098795

  • Replaces Mercruiser # 8M0098795 and 861523A9
  • For use with Bravo Drives
  • High Performance Coupler
Note: Always make sure when installing a new coupler that the engine is aligned properly, failure to do so will greatly reduce lifespan.

Engine Coupler 76850A2
Your Price:
$190.99

Engine Coupler 76850A2

700-11500

Engine Coupler (1985 & Before) replaces MerCruiser part # 76850A2

This coupler is used on all older Chevy engines with 2 piece rear main seals.


Engine Coupler 59826A3
Your Price:
$363.99

Engine Coupler 59826A3

700-11510

Engine Coupler replaces MerCruiser part # 59826A3

This coupler is used on all Ford engines.


Engine Coupler 14505A2
Your Price:
$319.99

Engine Coupler 14505A2

700-11520

Engine Coupler (1986 & Up) replaces MerCruiser part # 14505A2

This coupler is used when a new replacement V6 or V8 Chevy with one piece rear main seal is used to replace an older V6 or V8 with a 2 piece rear main seal.


Engine Coupler with Yoke 18643A7
Your Price:
$310.99

Engine Coupler with Yoke 18643A7

700-11530

Engine Coupler with Yoke- Fits MCM GM V6 & V8 (305 & 350 CID) (1983-1993) & 454 MAG Alpha replaces MerCruiser part # 18643A7


Engine Coupler without Yoke 18643A5
Your Price:
$251.99

Engine Coupler without Yoke 18643A5

700-11532

Engine Coupler without Yoke - Fits MCM 3.0L (1999 & Up) GM V6 & V8 (305 & 350 CID) engines (1993 & Up) replaces MerCruiser part # 18643A5


Engine Coupler Kit
Your Price:
$344.99

Engine Coupler Kit

676-18-2195

Key Features:

  • Flex plate style for GM 4 cyl. engines w/late style, small crankshaft bolt pattern

Additional Details:

  • Fits: MCM 120/2.5L & 140/3.0L (1987-1993)

Interchanges/Replaces

Mercruiser Stern Drive

  • 12632A3
  • 12632A7

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2146GLM
  • 28315
Mallory
  • 9-72401
Mercruiser Stern Drive
  • 59830A1
  • 59830A7
OMC Stern Drive
  • 3850815
  • 912212
Volvo Penta
  • 3850815
1Yoke N/A

Engine Coupler
Your Price:
$206.99

Engine Coupler

676-18-2321

Key Features:

  • Same as 18-2195 without yoke

Additional Details:

  • Fits: MCM 120/2.5L & 140/3.0L (1987-1993)

Interchanges/Replaces

Mallory

  • 9-72506

Mercruiser Stern Drive

  • 12632A6

Engine Coupler
Your Price:
$455.99

Engine Coupler

676-18-2413

Additional Details:

  • Fits: MCM 470 & 485 (224 cu. in) S/N 4208730-6218036 (1976-1982)

Interchanges/Replaces

Mallory

  • 9-72504

Mercruiser Stern Drive

  • 69354A1
  • 69354A2

Engine Coupler
Your Price:
$393.99

Engine Coupler

676-18-2414

Additional Details:

  • For: 165, 170, 470, 3.7L s/n 6170297 & Up (1983-1989)
  • For: 180, 190, 488, 3.7LX s/n 6170297 & Up (1983-1989)

Interchanges/Replaces

Mallory

  • 9-72505

Mercruiser Stern Drive

  • 97432A2

Engine Coupler
Your Price:
$207.99

Engine Coupler

676-18-21751

Additional Details:

  • Fits: OMC 2.5L (1986), 3.0L (1986-90), 4.3L/5.0L/5.7L (1986) KW & KWB Suffix only.
  • Fits: OMC 7.4L (1990-98), 8.2L (1992-93, 1998)

Interchanges/Replaces

OMC Stern Drive

  • 3853962
  • 983902
  • 986338

Volvo Penta

  • 3853962

Engine Coupler
Your Price:
$230.99

Engine Coupler

676-18-21752-1

Additional Details:

  • Fits: 4.3L (1986-98), 5.0L (1986-88, 1998), 5.7L (1986-92, 1994, 1996-98)

Interchanges/Replaces

OMC Stern Drive

  • 3853917
  • 3858437
  • 984290
  • 986120

Volvo Penta

  • 3853917
  • 3858437

Engine Coupler
Your Price:
$373.99

Engine Coupler

676-18-21753

Additional Details:

  • Fits: 5.0L & 5.8L (1989-96)

Interchanges/Replaces

OMC Stern Drive

  • 3853862
  • 985727

Volvo Penta

  • 3853862

Engine Coupler
Your Price:
$597.99

Engine Coupler

676-18-21754

Additional Details:

  • Fits: 7.5L / 460 King Cobra 1987-90

Interchanges/Replaces

OMC Stern Drive

  • 984537
  • 986232

Engine Coupler
Your Price:
$550.99

Engine Coupler

676-18-21755

Additional Details:

  • For: 2.3L Cobra

Interchanges/Replaces

OMC Stern Drive

  • 984629

Engine Coupler Wrench 91-35547
Your Price:
$244.33

Engine Coupler Wrench 91-35547

525-91-35547

Engine Coupler Wrench 91-35547

Removes and installs the engine coupler, torques the bolts on the couplers that mount directly to the crankshaft, 1/2 in. drive.