Piston Kits - Johnson Evinrude

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.

Mercruiser HP Bravo Drive Coupler 8M0098795

• Replaces Mercruiser # 8M0098795 and 861523A9
• For use with Bravo Drives
• High Performance Coupler

Additional Details:

• Bore Size: 3.000 / Std

Interchanges/Replaces

GLM

• 24040

Johnson/Evinrude Outboard

• 387284
• 5006751

Mallory

• 9-53416

Wiseco

• 3015PS
• 3115PS

Key Features:

• Standard, Port

Interchanges/Replaces

GLM

• 23800

Johnson/Evinrude Outboard

• 393566
• 5006659

Mallory

• 9-53430

Wiseco

• 3018PS
• 3118PS

• Made in the USA, patent pending
  
• Anodized billet aluminum for maximum corrosion resistance, even in saltwater environments.
• 100% rebuildable
• Direct replacement for the OEM coupler, zero modifications required.
  
• Chromoly splines that are stronger than the OEM coupler and can be replaced (for less $$ than purchasing a replacement OEM coupler) when required. 
  
• Replaceable Polyurethane dampeners with external wear indicator
• Rated for 1,000+HP
  
• Perfect for diesel engines and applications that see extended idling (which is a common issue for the OEM coupler).
• Unlike the OEM coupler, will not break loose and spin if the dampening material fails (Get Home Mode)
• Two year warranty
• Replaces Mercruiser # 8M0098795, 861523A18, and 861523A9

• Includes 2 Polyurethane dampeners and 1 spline hub.
• Used on 221-1022 Drive Couplers ONLY!

• Made in the USA, patent pending
• Ideal for Diesel applications, Boats that do a lot of idling 
• Grease fitting for easy access to service splines
• Anodized billet aluminum for maximum corrosion resistance, even in saltwater environments.
• 100% rebuildable
• Direct replacement for the OEM coupler, zero modifications required.
• Chromoly splines that are stronger than the OEM coupler and can be replaced (for less $$ than purchasing a replacement OEM coupler) when required. 
• Replaceable Polyurethane dampeners with external wear indicator
• Rated for 1,000+HP
• Perfect for diesel engines and applications that see extended idling (which is a common issue for the OEM coupler).
• Unlike the OEM coupler, will not break loose and spin if the dampening material fails (Get Home Mode)
• Two year warranty
• Replaces Mercruiser # 8M0098796, Supercedes 861523A7