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Flappers and Shutters for Mercruiser
Part Number / Price Name / Description
BPI89160   

$18.95 
   
Quantity in Basket: none
Shutter Flapper Exhaust Y Pipe 3 Inch for Mercruiser 99370A2


3" Water Shutter that was used on V-6 & V-8 Mercruiser applications with center riser manifolds from 1982 thru 1987. It's purpose is to keep water from backing into the Riser & Manifold.
 
BPI9-42800   

$19.95 
   
Quantity in Basket: none
Water Shutter, Mercruiser 4 Cylinder-Small Block V8


Water Shutter, Exhaust fits Fits: Mercruiser 4 cyl - V8 SB with a 3 Inch OD. Exhaust Pipe.
Replaces: Mercruiser 60930
 
GLM89175   

$43.95 
   
Quantity in Basket: none
Shutter Water Exhaust Flapper for Mercruiser 4 Inch Y Pipe V6 V8 807166A1


4 Inch Water Shutter that fits many Mercruiser applications.
It is 2-1/2" wide and 6-1/8" long
This valve has a butterfly action and comes with 2 grommets. Sold as Each.
If your flapper currently has square grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper (except 4.3L with 1-Piece Manifold System)
If your current flapper is held in with round grommets, then you need BPI89170 or MAL9-42802

 
GLM89250   

$23.95 
   
Quantity in Basket: none
Flapper Exhaust Protector for 4 Inch Thru Hull Outlet


Exhaust Flapper Valves with Clamps
Fits Mercruiser with 4" Flapper valves
 
GLM89260   

$36.95 
   
Quantity in Basket: none
Flapper Exhaust Protector for 5 and 6 Inch Thru Hull Outlet


Exhaust Flapper Valves with Clamps
Fits Mercruiser with 5" and 6" Flapper valves
 
MAL9-42800   

$19.95 
   
Quantity in Basket: none
Water Shutter Exhaust Flapper for Mercruiser 4 Cyl - Small Block V8 60930


Water Shutter, Exhaust fits Fits: Mercruiser 4 cyl - V8 SB with a 3 Inch OD. Exhaust Pipe.
Replaces: Mercruiser Quicksilver # 60930; Sierra # 18-2727; GLM # 89165
 
MAL9-42801   

$16.95 
   
Quantity in Basket: none
Shutter Flapper Exhaust Y Pipe 3 Inch for Mercruiser 99370A2


3" Water Shutter that was used on V-6 & V-8 Mercruiser applications with center riser manifolds from 1982 thru 1987. It's purpose is to keep water from backing into the Riser & Manifold.
 
MAL9-42802   

$22.95 
   
Quantity in Basket: none
Shutter Water Flapper Exhaust Y Pipe for Mercruiser 807166A3


Exhaust Water Shutter for a Mercruiser Sterndrive
It is used in the 4.0" Exhaust Y-Pipe 1987 & Up
These Water Shutters are sold as Each
If your flapper currently has "round" grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper
If your current flapper is held in with "square" grommets, then you need GLM89175
This item replaces Mercruiser 807166A3 & 14348T.
 
MER25-43809   

$1.95 
   
Quantity in Basket: none
Grommet-Exhaust Flapper Pin, Mercruiser


Grommet for Water Shutter (Flapper Valve) on Mercruiser

Note: 2 Required Per Flapper
 
MER45586   

$34.95 
   
Quantity in Basket: none
Exhaust Shutters, Mercruiser Inline 4, 6 and 3.7L


Water Shutter for Exhaust on Mercruiser Inline Engines with a 2.5 Inch OD Exhaust Pipe.
 
MER60930   

$31.95 
   
Quantity in Basket: none
Shutter Exhaust Flapper 3 Inch Butterfly Design for Mercruiser 73-up 60930


3 Inch Flapper Water Shutter Butterfly Design for various Mercruiser 1973 and newer with a 3 Inch diameter Y pipe. We call this the butterfly design because it flaps on each side of the center rather than the whole piece moving as one. This keeps the water from surging up the exhaust and getting into you motor through the exhaust riser.
 
MER60931   

$12.95 
   
Quantity in Basket: none
Retainer, Water Shutter, Mercruiser


Retainer for MER60930 Water Shutter
 
MER807166A1   

$69.95 
   
Quantity in Basket: none
Shutter Water Exhaust Flapper for Mercruiser 4 Inch Y Pipe V6 V8 807166A1


4 Inch Water Shutter that fits many Mercruiser applications.
It is 2-1/2" wide and 6-1/8" long
This valve has a butterfly action and comes with 2 grommets. Sold as Each.
If your flapper currently has square grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper (except 4.3L with 1-Piece Manifold System)
If your current flapper is held in with round grommets, then you need BPI89170 or MAL9-42802

 
MER807166A2   

$64.95 
   
Quantity in Basket: none
Shutter Water Exhaust Flapper Y Pipe Mercruiser V6 1 Piece Manifold


Water Shutter Kit for Mercruiser V6 with 1 piece Y-Pipe manifolds.
Only fits Y pipe used with original 1 piece exhaust manifold.
IF you have converted to the two piece manifold and your application had the 1 piece originally this is the shutter you need.
Genuine Mercury Marine Quicksilver original equipment part # 807166A 2
 
MER807166A3   

$74.95 
   
Quantity in Basket: none
Shutter Water Flapper Exhaust Y Pipe for Mercruiser 807166A3


Exhaust Water Shutter Flapper for 4 Inch Y pipe used on Mercruiser.

Fits into the "Y" Pipe on most V-6 & V-8 engines to help prevent water from backing into the manifold and engine
swivel design and is sold in pairs

If your flapper currently has round grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper
If your current flapper is held in with square grommets, then you need MER807166A1

Replaces Mercruiser OEM # 807166A3
  • Does Not Fit 4.3 Engines Originally Equipped with the 1 Piece Exhaust Manifold
 
MER99370A2   

$28.95 
   
Quantity in Basket: none
Shutter Flapper Exhaust Y Pipe 3 Inch for Mercruiser 99370A2


3" Water Shutter that was used on V-6 & V-8 Mercruiser applications with center riser manifolds from 1982 thru 1987. It's purpose is to keep water from backing into the Riser & Manifold.
 
SIE18-2732   

$49.95 
   
Quantity in Basket: none
Shutter Water Flapper Exhaust Y Pipe for Mercruiser 807166A3


Exhaust Water Shutter Flapper for 4 Inch Y pipe used on Mercruiser.

Fits into the "Y" Pipe on most V-6 & V-8 engines to help prevent water from backing into the manifold and engine
swivel design and is sold in pairs

If your flapper currently has round grommets that hold it in, and a 4 inch Y-Pipe, then this is the correct flapper
If your current flapper is held in with square grommets, then you need MER807166A1

Replaces Mercruiser OEM # 807166A3
  • Does Not Fit 4.3 Engines Originally Equipped with the 1 Piece Exhaust Manifold
 
SIE18-2733   

$19.95 
   
Quantity in Basket: none
Shutter Flapper Exhaust Y Pipe 3 Inch for Mercruiser 99370A2


Water Shutter that was used on V-6 & V-8 Mercruiser applications with center riser manifolds from 1982 thru 1987 with the 3 Inch Diameter Y Pipe.

It's purpose is to keep water from backing into the Riser & Manifold and into the engine.

Many times you will hear a knocking sound near the back of the engine. This usually means the rubberized coating has worn or burned off which causes this sound.


Replaces Mercruiser 99370A2