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Water Shutter 807166A1 - For MerCruiser Stern Drives - Exhaust 

  • Acts as a check valve to keep following seas/water from washing back through exhaust to engine when engine is not running or at low RPM.
  • Shutter is 2.48" diameter at cross pin (hinge pin).
  • Easy to install with common shop tools.
  • See your owner's manual or service manual for specific applications and replacement instructions.
  • Produced by Mercury Marine to our stringent original equipment manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or MerCruiser stern drive
e manifold. For freshwater installations.

Don't know if this part is right for your application? Use our handy Mercury Replacement Parts Finder Tool to check. Make sure you know your Model, Year and Serial Number.

NOTICE: Any images shown are representational ONLY and do not necessarily depict the actual part or included items in a particular part or kit. Mercury has been known to remove items depicted in product images such as screws or gaskets from kits they make without notification. For any product content, fitment or application questions on this part please call Mercury Product Support at 920-929-5040.

MSRP: $96.92
Your Price: $82.99
You Save: 14% off MSRP!

NOTE: This Item is a Non-Stocked, Special Order, OEM Mercury Part.
ALL OEM Mercury parts may take up to 7-10 days to ship. All OEM Mercury parts are NON-RETURNABLE! Orders placed on all OEM Mercury parts are NON-REFUNDABLE! Please contact us with the part number and we can assist you with more accurate delivery time estimate.
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Additonal Info On This Product:

Applications Where This Item Is Used:

5.7LX TBI BRAV0 350 TBI MAG ALPHA (EFI) - 350 MAG. ALPHA EFI(GEN+) GM 350 V-8 19974.3L MPI ALPHA/BRAVO - 4.3L MPI ALPHA/BRAVO
7.4L BRAVO I, II, III, ENGINE - 454 MAG. BRAVO (GEN. V) GM 454 V-8 1996-19975.0L EFI ALPHA/BRAVO 5.7L EFI ALPHA/BRAVO (GEN +) ENGINE - 5.7L EFI GM 350 V-8 1998
5.0L / 5.7L STERNDRIVE - 5.7L CARB ALPHA/BRAVO5.7LX TBI BRAV0 350 TBI MAG ALPHA (EFI) - 5.7LX BRAVO EFI (GEN+) GM 350 V-8 1997
5.7L/LX 350 MAG ALPHA/BRAVO - 5.7LX (4 BBL) GM 350 V-8 1996350 MAG MPI BRAVO - 350 MAG. BRAVO MPI(GEN+) GM 350 V-8 1997
385 PERFORMANCE TUNED - 385 Performance Tuned7.4L MPI BRAVO L29 (GEN VI) - 7.4L BRAVO (MPI)(GEN. VI) GM 454 V-8 1998-2000
7.4L BRAVO - 7.4L BRAVO GM 454 V-8 1988-1991496 MAG STERNDRIVE EC - 496 MAG EC (Base Model)
350 MAGNUM ALPHA (EFI-TBI) - 5.7LX BRAVO EFI (GEN+) GM 350 V-8 19965.7L 2BBL 5.7LX 4BBL 350 MAG ALPHA/BRAVO - 350 MAG. ALPHA (4 BBL.) GM 350 V-8 1997
5.0, 350, 377 MAG MPI STERNDRIVE EC - 377 MAG MPI BRAVO EC350 MAGNUM ALPHA (EFI-TBI) - 350 MAG. ALPHA EFI(GEN+) GM 350 V-8 1996
350 MPI ALPHA REMAN - 350 MPI ALPHA5.0, 350, 377 MAG MPI STERNDRIVE - 5.0L MPI ALPHA/BRAVO
5.0L, 350, 377 MAG MPI STERNDRIVE - 5.0L MPI ALPHA/BRAVO5.0L,350 MAG,MX 6.2L MPI STERNDRIVE - 5.0L MPI ALPHA/BRAVO
8.2 MAG / 8.2 MAG HO EC - 8.2L Mag EC (H.O. Model)7.4L 454 MAG BRAVO GEN V - 7.4L BRAVO (GEN. V) GM 454 V-8 1992-1996
4.3L ALPHA 4V - 4.3L (GEN +) (4BBL) Reman5.0, 350, 377 MAG MPI STERNDRIVE EC - 5.0L MPI ALPHA/BRAVO EC
5.0L,350 MAG,MX 6.2L MPI STERNDRIVE - MX 6.2L MPI HORIZON BRAVO7.4L 454 MAG BRAVO GEN V - 454 MAG. BRAVO (GEN. V) GM 454 V-8 1992-1994
5.0L,350 MAG,MX 6.2L MPI STERNDRIVE - 350 MAG MPI HORIZON ALPHA/BRAVO4.3L/LX ALPHA/BRAVO (GEN II) - 4.3L (GEN II) (2 BBL.) GM 262 V-6 1996
4.3L/4.3LX ALPHA ONE ENGINE (262 CID) - 4.3L (GEN II) (2 BBL.) GM 262 V-6 1992-19935.0L, 350, 377 MAG MPI STERNDRIVE EC - 377 MAG MPI BRAVO EC
MPI STERNDRIVE - MX 6.2L MPI HORIZON BRAVO5.0L, 350, 377 MAG MPI STERNDRIVE EC - 350 MAG MPI HORIZON ALPHA/BRAVO EC
4.5L MPI ALPHA/BRAVO - 4.5L MPI 250 Alpha/Bravo EC5.0L, 350, 377 MAG MPI STERNDRIVE - 377 MAG MPI BRAVO
383 MAG STROKER-REMANUFACTURED - 383 MAG STROKER5.0L/5.7L ALPHA/BRAVO GEN+ - 5.0L (2 BBL.) GM 305 V-8 1998-2001
8.2 MAG / 8.2 MAG HO EC - 8.2L Mag EC (Base Model)5.0L / 5.7L EFI ALPHA/BRAVO (GEN +) ENGINE - 5.7L EFI GM 350 V-8 1999-2001
5.0L / 5.7L EFI ALPHA/BRAVO (GEN +) ENGINE - 5.0L EFI GM 305 V-8 1999-20015.0L, 350, 377 MAG MPI STERNDRIVE EC - 5.0L MPI ALPHA/BRAVO EC
350 MAGNUM MPI ALPHA/BRAVO (GEN+) ENGINE - 350 MAG MPI ALPHA/BRAVOMPI STERNDRIVE - 5.0L MPI ALPHA/BRAVO
357 MAG BRAVO 4V/357 ALPHA 4V/383 MAG BRAVO 4V - 357 Mag Bravo 4V5.0, 350, 377 MAG MPI STERNDRIVE - 350 MAG MPI ALPHA/BRAVO
5.0, 350, 377 MAG MPI STERNDRIVE - 377 MAG MPI BRAVO8.2L MAG / 8.2L MAG HO - 8.2L Mag (H.O. Model)
4.3L MPI ALPHA/BRAVO( 262 C.I.D. MULTI PORT INJECTION ) - 4.3L MPI ALPHA/BRAVO5.0L/5.7L ALPHA/BRAVO GEN+ - 5.7L (2 BBL.) GM 350 V-8 1998-2001
5.0, 350, 377 MAG MPI STERNDRIVE EC - 350 MAG MPI HORIZON ALPHA/BRAVO EC4.3L EFI ALPHA/BRAVO (262 CID - GEN+) - 4.3L EFI (GEN+) TBI GM 262 V-6
MPI STERNDRIVE - 350 MAG MPI HORIZON ALPHA/BRAVO5.0L, 350, 377 MAG MPI STERNDRIVE - 350 MAG MPI ALPHA/BRAVO
5.7L/LX TBI ALPHA & BRAVO(2BBL/4BBL) - 5.7LX EFI (4 BBL.-TBI) GM 350 V-8 19965.0L EFI ALPHA/BRAVO 5.7L EFI ALPHA/BRAVO (GEN +) ENGINE - 5.0L EFI GM 305 V-8 1998
4.3L EFI ALPHA/BRAVO (262 C.I.D. GEN+) - 4.3L EFI (GEN+) TBI GM 262 V-6350 MAGNUM BRAVO (EFI-MP GEN+) - 350 MAG. BRAVO MPI(GEN+) GM 350 V-8 1996
8.2L MAG / 8.2L MAG HO - 8.2L Mag (Base Model)496 MAG STERNDRIVE EC - 496 MAG EC (H.O. Model)
262 MAGNUM (EFI - TBI) - 262 MAG (TBI)(GEN+)4.3L CARB ALPHA/BRAVO - 4.3L CARB ALPHA/BRAVO
4.3 LX/LXH ALPHA AND BRAVO (GEN +) - 4.3LX (GEN +) (2 BBL.) GM 262 V-6 1996-1997357 MAG BRAVO 4V/357 ALPHA 4V/383 MAG BRAVO 4V - 357 Alpha 4V
4.3L ALPHA/BRAVO (262 CID - GEN +) - 4.3LH (GEN +) (4 BBL.) GM 262 V-6 19985.7L/LX 350 MAG ALPHA/BRAVO - 350 MAG. ALPHA (4 BBL.) GM 350 V-8 1996
7.4 LX (EFI-MPI) BRAVO (GEN VI) - 7.4LX BRAVO (MPI)(GEN. VI) GM 454 V-8 1996-19978.2 MAG HO EC - 8.2L Mag EC (H.O. Model)
5.7L 2BBL 5.7LX 4BBL 350 MAG ALPHA/BRAVO - 5.7L (2 BBL.) GM 350 V-8 1997383 MAG STROKER BRAVO-REMAN - 383 MAG STROKER BRAVO
5.7LX TBI BRAV0 350 TBI MAG ALPHA (EFI) - 5.7L EFI (GEN+) REPOWER PLUS GM 350 V-87.4L BRAVO I, II, III, ENGINE - 7.4L BRAVO (GEN. VI) GM 454 V-8 1996-1997
8.2 MAG HO EC - 8.2L Mag EC (Base Model)7.4 LX (EFI-TBI) BRAVO (GEN VI) - 7.4LX BRAVO (TBI)(GEN. VI) GM 454 V-8 1996-1997
357 MAG BRAVO 4V/357 ALPHA 4V/383 MAG BRAVO 4V - 383 Mag Bravo 4V5.7L/LX 2BBL AND 4BBL TBI ALPHA/BRAVO - 5.7LX EFI (4 BBL.-TBI) GM 350 V-8 1997
7.4 LX (EFI-MP) BRAVO - 7.4LX BRAVO (MPI)(GEN. V) GM 454 V-8 19965.0L, 350, 377 MAG MPI STERNDRIVE EC - 350 MAG MPI ALPHA/BRAVO EC
MX 6.2L MPI BRAVO ENGINE - MX 6.2L MPI BRAVO4.3L MPI ALPHA/BRAVO EC - 4.3L MPI ALPHA/BRAVO EC
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