Drive System Parts - Lower Unit Parts

2-1/2" to 3" I.D. External Flapper
Your Price:
$19.99

2-1/2" to 3" I.D. External Flapper

810-EG-300

2-1/2" to 3" I.D. External Flapper

These are excellent American-made flaps that will not curl like cheap import copies. These are a must for boats with a very close distance between exhaust ports and the water line Clamp is included. This flap has a 3" ID and must be cut down for 2-1/2" applications. Sold each.


3-1/2" to 4" I.D. External Flapper
Your Price:
$19.99

3-1/2" to 4" I.D. External Flapper

810-EG-400

3-1/2" to 4" I.D. External Flapper

These are excellent American-made flaps that will not curl like cheap import copies. These are a must for boats with a very close distance between exhaust ports and the water line Clamp is included. This flap has a 4" ID and must be cut down for 3-1/2" applications. Sold each.


4" Silent Seal Easy Service Exhaust Flapper Assembly
Your Price:
$39.99

4" Silent Seal Easy Service Exhaust Flapper Assembly

410-280179

4" Silent Seal Easy Service Exhaust Flapper Assembly (Each)

At last an answer to eliminating the annoying clanking and banging caused by old design stainless anti-burn exhaust flaps. It seems the many complaints of knocking engine noises and fears caused by the sounds of anti-burn flaps have created the demand to develop and cure this problem once and for all. The all new "Silent Seal" exhaust flap with its special high temp burn resistant rubber compounded exhaust flap and stainless steel cage design provide the perfect answer. This new flap design provides a superior seal and quiet operation. These flaps can easily be retrofitted to earlier style tips with just minor brazing or welding of the flap cage to your exhaust tip.


4" Silent Seal Easy Service Replacement Exhaust Flapper
Your Price:
$28.99

4" Silent Seal Easy Service Replacement Exhaust Flapper

410-280181

4" Silent Seal Easy Service Exhaust Replacement Flapper (Each)

These kits include a replacement flap, (2) two screws and (2) two flanges (front & back) to replace old or damaged flaps in Hardin Marine 4" exhaust tips.
These will fit in #410-281400, #410-281401, #410-281402, and #410-281403 exhaust tips.
The mounting holes are 1" apart

These flaps are 3-3/4" in diameter to inside of the 4" Hardin exhaust tip.


4" Slip-On Silent Seal Flap Assembly
Your Price:
$49.99

4" Slip-On Silent Seal Flap Assembly, Stainless Steel

410-280195

4" Slip-On Silent Seal Flap Assembly, Stainless Steel

At last, a combination of our best flap in what is now the easiest installation ever. Whether your tired of "Clanking" metal flaps or just can't believe you have to cut out and braze in a new butterfly styleflap; there finally is a solution. Hardin Marine has designed this easy to install effective slip on version of the popular "Silent-Seal"exhaust flap. No cutting or welding, this unit is designed to merely slip over the inlet side of your existing 4" exhaust tip, and is held or clamped into place by your existing exhaust hose. It couldn't be easier.The unit can now be serviced externally, due to the silent seal flap design. There are two retaining screws that bolt the tab to the slip on cage for easy serviceability. Definitely one of the best new conceived part of the year.

Sold Each. 

NOTE: The Outside Diameter of the tip these are to be installed on must be  4".

4" Stainless Steel Exhaust Flappers
Your Price:
$329.99

4" Stainless Steel Exhaust Flappers

410-280175

4" Stainless Steel Exhaust Flappers (Sold in pairs)

If you're like us and can't stand the ugly sight of those black rubber Salisbury style flappers then feast your eyes on this piece.  Hardin Marine has handcrafted these beautifully polished stainless steel exhaust flappers to eliminate that eyesore.  The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate finishing touch to your boats exhaust system.  Available in 4", 4-1/2" or 5" sizes. Sold in Pairs.


Replacement Flap Assembly
Your Price:
$71.99

4" Stainless Steel Replacement Corsa Flap Assembly

270-10900

Replacement Flap Assembly for Corsa Tips and Diverters. For 4" Tips and diverters. Can be used in non-Corsa tips and diverters. 


5" Stainless Steel Exhaust Flappers
Your Price:
$329.99

5" Stainless Steel Exhaust Flappers

410-280177

5" Stainless Steel Exhaust Flappers (pair)

If you're like us and can't stand the ugly sight of those black rubber Salisbury style flappers then feast your eyes on this piece.  Hardin Marine has handcrafted these beautifully polished stainless steel exhaust flappers to eliminate that eyesore.  The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate finishing touch to your boats exhaust system.  Available in 4", 4-1/2" or 5" sizes.


4-1/2" Stainless Steel Exhaust Flappers
Your Price:
$429.99

6" Stainless Steel Exhaust Flappers

410-280166

6" Stainless Steel Exhaust Flappers (EACH)

Due to the popularity of these Hardin Marine handcrafted beautifully polished stainless steel exhaust flappers they have created the option for larger versions. The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate in durability and finishing touch to your boats exhaust system. These units are manufactured from 316L Stainless Steel and a silicon seal  *NOTE they require a minimum of 1-1/2" of exhaust tip for adequate clamping and attachment. 

These units are SOLD EACH and are custom built and require 2-3 weeks for delivery!


8-1/4" Stainless Steel Exhaust Flappers
Your Price:
$695.99

8-1/4" Stainless Steel Exhaust Flappers

410-280168

8-1/4" Stainless Steel Exhaust Flappers (EACH)

Due to the popularity of these Hardin Marine handcrafted satin stainless steel exhaust flappers they have created the option for larger versions. The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate in durability and finishing touch to your boats exhaust system. These units are manufactured from 316L Stainless Steel and a silicon seal

*NOTE they require a minimum of 1-1/2" of exhaust tip for adequate clamping and attachment. 

These units are SOLD EACH and are custom built and require 2-3 weeks for delivery!


Angle Cut Exhaust Clamp on Flap, Stainless Steel
Your Price:
$169.99

Angle Cut Exhaust Clamp on Flap, Stainless Steel

410-280185

Angle Cut Exhaust Clamp on Flap, Stainless Steel

If you've always wanted the stylish look of a angled cut tip but couldn't due to the fact you really needed the safety of an external flapper then we have the answer you've been looking for. These high polished 316L stainless steel external flaps are designed to slides over an existing 4" straight cut tip and provide the security of a secondary or even primary exhaust flapper. Sold in pairs.

Replacement Flap Assembly
Your Price:
$58.99

Corsa Exhaust Linkage Replacement Kit

270-10830

Linkage replacement kit that repairs or replaces components that connect the solenoids (#270-10871) to the shafts. Includes links, washers, pins, clips and 3/8" adjustment assembly. NOTE: Each kit contains parts for one diverter.


Lower Gear Housing Mercruiser 1623-815822A36
Your Price:
$1,310.99

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

Lower Gear Housing Mercruiser 1623-815822A36

676-9-79126

Lower Gear Housing
Replaces: Mercury – Mercruiser 1623-815822A36
Fits: Alpha I Gen II (sn 0F680000 & up)
Mallory Marine has over 80 years of market leadership in the automotive industry and now has an extended range of professional quality marine parts to service every major system on your outboard, inboard and sterndrive. All Mallory Marine parts are covered by a two year limited warranty.


Lower Gear Housing Mercruiser 1623-8951A 37
Your Price:
$1,460.99

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

Lower Gear Housing Mercruiser 1623-8951A 37

676-9-79127

Lower Gear Housing (MR / Alpha)
Replaces: Mercruiser 1623-8951A 37
Fits: MR/Alpha 1984-90
Mallory Marine has over 80 years of market leadership in the automotive industry and now has an extended range of professional quality marine parts to service every major system on your outboard, inboard and sterndrive. All Mallory Marine parts are covered by a two year limited warranty.


Lower Gear Housing OMC 439972
Your Price:
$683.99

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

Lower Gear Housing OMC 439972

676-9-79300

Lower Gear Housing
Replaces: Johnson / Evinrude / OMC 439972
Fits: V4 / V6 outboard 1979-Up OMC Cobra
Mallory Marine has over 80 years of market leadership in the automotive industry and now has an extended range of professional quality marine parts to service every major system on your outboard, inboard and sterndrive. All Mallory Marine parts are covered by a two year limited warranty.


Lower Unit Gear Repair Kit Mercruiser 43-803091T1
Your Price:
$833.99

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

Lower Unit Gear Repair Kit Mercruiser 43-803091T1

676-9-79200

Lower Unit Gear Repair Kit
Replaces: Mercruiser 43-803091T1
Fits: MR/Alpha I
Mallory Marine has over 80 years of market leadership in the automotive industry and now has an extended range of professional quality marine parts to service every major system on your outboard, inboard and sterndrive. All Mallory Marine parts are covered by a two year limited warranty.


Straight Cut Exhaust Clamp on Flap, Stainless Steel
Your Price:
$159.99

Straight Cut Exhaust Clamp on Flap, Stainless Steel

410-280190

Straight Cut Exhaust Clamp on Flap, Stainless Steel

If you one of the thousands of people frustrated that Your beautiful boat's gleaming exhaust tips are finished off with an ugly rubber salsbury flap then we finally have your answer. These new 316L stainless steel clamp on external flaps slide on to and clamp to a 4" stainless exhaust tip. They are not only do the job their designed for but they will do it in style. Sold in pairs.