LS Engine Parts and Accessories - Flywheels and Power Take-Offs

Hardin Billet Aluminum Flywheel Internal Balance for GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material:Aluminum

These precision billet aluminum flywheels deliver all of the strength and reliability that you desire with the light weight and advantages that only aluminum can provide. Lightweight Aluminum alloy flywheels can offer substantial benefits for certain situations such as light weight boats or racing boats that need rapid engine rpms instantaneously. These are recommended as replacements for factory-cast flywheels in high performance and racing applications. They're better for acceleration of heavier race boats. All Hardin flywheels are CNC-machined from certified materials.

• Accepts Mercury HP couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• Bottom Mount Starter Flywheel
• Weight: 12 lbs

Internal Balance Alum. Flywheel LS 1, 2, 3, 6, 7 Chevy (Top/Bellhousing Mounted Starter)

These all new billet aluminum flywheels are manufactured from certified billet material that will not break up under the stress and severe punishment of on and off throttle in high RPM marine environments.

Attaching locating tabs have been installed on the ring gear making rear gear shift and movement a thing of the past. By using a lighter aluminum flywheel, you will be rewarded with both faster acceleration and deceleration. Giving you the edge you’re looking for.

Billet construction

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• 12 lbs.

Internal Balance Alum. Flywheel LSA/LSX Chevy (Bottom Mounted Starter)

These all new billet aluminum flywheels are manufactured from certified billet material that will not break up under the stress and severe punishment of on and off throttle in high RPM marine environments.

Attaching locating tabs have been installed on the ring gear making rear gear shift and movement a thing of the past. By using a lighter aluminum flywheel, you will be rewarded with both faster acceleration and deceleration. Giving you the edge you’re looking for.

Billet construction

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• 12 lbs

Hardin Steel Flywheel Internal Balance GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material: Steel

These precision steel flywheels deliver all of the strength and reliability that you need in a performance application) Cast flywheels are porous units designed for low rpm truck and industrial applications) Steel provides a shatter free strength that could mean the difference between ripping your boat in half under way. These neutrally balanced units drilled to accept popular Mercruiser high Performance couplers.

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Zero/neutral balance • 168 tooth gear
• Bottom Mount Starter Flywheel
• Weight: 32 Lbs

Internal Balance Steel Flywheel LS 1, 2, 3, 6, 7 Chevy (Top/Bellhousing Mounted Starter)

These all new steel flywheels are manufactured from certified material that will not break up under the stress and severe punishment of on and off throttle in high RPM marine environments.

Attaching locating tabs have been installed on the ring gear making rear gear shift and movement a thing of the past. 

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• 28 lbs.

Internal Balance Alum. Flywheel LSA/LSX Chevy (Top Mounted Starter)

These all new billet aluminum flywheels are manufactured from certified billet material that will not break up under the stress and severe punishment of on and off throttle in high RPM marine environments.

Attaching locating tabs have been installed on the ring gear making rear gear shift and movement a thing of the past. By using a lighter aluminum flywheel, you will be rewarded with both faster acceleration and deceleration. Giving you the edge you’re looking for.

Billet construction

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• 12 lbs.

Internal Balance Steel Flywheel LSA/LSX Chevy (Bottom Mounted Starter)

These all new steel flywheels are manufactured from certified material that will not break up under the stress and severe punishment of on and off throttle in high RPM marine environments.

Attaching locating tabs have been installed on the ring gear making rear gear shift and movement a thing of the past. 

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Zero/neutral balance • 168 tooth gear
• 32 lbs.

High Performance Damper Plate

Heavy Duty - Similar to the standard duty but designed to take the punishment of a high performance engine. 26 Spline.

• Overall Dia.: 13-1/4"
• Spring Housing: 7-1/8"
• Outer Lip: 9-1/2"
• Inner Dia: 1-1/4"
• Spline: 26
• Thickness: 1-1/16"

Heavy Duty Mercury 1075 Damper / Drive Plate

New 1075 Mercury HP direct replacement damper plate with dual bolt patterns, eight cryo-treated springs and 26 spline chromoly hub and backing plate. Built to withstand the extreme HP and torque of today’s high performance engines. Replaces OEM # 8M0050119, 842554A1. This will fit both 755-8602 top mount, neutral balanced steel flywheel as well as stock Mercury flywheel

Heavy Duty Mercury 1350 / 1650 Damper / Drive Plate

Direct replacement for the factory Mercury Racing 1350/1650 QC4V Damper plate with a 1.375” shaft that has 26 splines. Heavy duty design with 8 cryo-treated springs and a chromoly backing plate and hub that can withstand significantly more torque than the OEM units. Replaces OEM #8M0058750

Standard Duty Damper Plate

Standard Duty - These plates contain damper springs similar to a car clutch disc. These springs take the shock out of the shift. Not recommended for high performance applications.

IMCO Heavy Duty Bravo Bellhousing

IMCO's new flywheel bellhousing is a direct replacement for installations using Bravo, XR, XZ and IMCO XTreme Advantage SC drives. The new bellhousing is reinforced in all critical areas with additional gusseting around the motor mount area. There is a flange at the top of the housing for accessory mounting. Better....and still affordable.

• 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

Mercruiser HP Bravo Drive Coupler 8M0098795

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

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

Power Take Off Adapter - LS Chevy 1310 Flexplate

Uses 3/8-24 bolts on 2" x 2-3/8" centers

These flanges bolt on the flexplate and accept 1310 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

Power Take Off Adapter - LS Chevy 1310 Flywheel

Uses 3/8-24 bolts on 2" x 2-3/8" centers

These flanges bolt on the flywheel and accept 1310 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

Power Take Off Adapter - LS Chevy 1350 Flexplate

Uses 7/16-20 bolts on 2-3/8" x 2-7/8" centers

These flanges bolt on the flywheel or flexplate and accept 1350 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

Power Take Off Adapter - LS Chevy 1350 Flywheel

Uses 7/16-20 bolts on 2-3/8" x 2-7/8" centers

These flanges bolt on the flywheel or flexplate and accept 1350 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

1310 Spicer Bolt Pattern To Jet Pump Spline

• Overall length: 7-1/2"
• Spline Shaft: 1-3/8"
• Flange Mount: 2" x 2-3/8"
• Spline length is 2" inside coupler
• Uses 3/8-24 bolts

This unit bolts to the PTO flange. This is the most standard u-joint assembly found in production style boats.
Note: The overall length does not include the PTO flange which is and additional one inch thick.

Need help choosing your new driveshaft? Check out this handy tutorial!