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Flappers Shutters 807166A1 Mercruiser Maniflold Review

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Average

Revainrating 3.5 out of 5  
Rating 
3.4
🌡️ Engine Cooling & Climate Control, 🛠️ Replacement Parts

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Description of Flappers Shutters 807166A1 Mercruiser Maniflold

☛ These will Not work on V6 engines that came with the one piece manifolds ( use 807166A2 it has a flat tip ) ,or early V8 with the round pin going through flapper. ☛ Used on many Mercruiser stern drive V8 engines. ( Some V6 that came with the two piece maniflold/elbow ). ☛ For 1998 and newer engines, there are some 1996 and 1997 models that apply. There will be two rectangular holes for the grommets. If your Y-pipe has round holes you need the A3 water shutters. If your Y-pipe changes size a few inches bellow the shutter you have a one piece manifold V6 Y-pipe and need shutter A2. ☛ If you have ever overheated these tend to get damaged. Sometimes you will find pieces of them in the exhaust when you remove the drive for servicing. They help keep water from entering the engine through the exhaust. ☛ Please check pictures and description for more details, and check your part number and our fitment before placing an order.

Reviews

Global ratings 3
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Type of review

Revainrating 4 out of 5

Improved Engine Performance with These Shutters!

I purchased these shutters to replace the old ones on my Mercruiser engine and I must say the difference is noticeable .My engine runs much smoother now and the temperature stays within optimal levels. The installation was easy and the quality seems top-notch. The only downside is the price, but it's worth the investment for a properly functioning engine. These shutters are a must-have for any automotive enthusiast!

Pros
  • Durable and long-lasting due to high-quality materials.
Cons
  • May require professional installation due to complexity.

Revainrating 4 out of 5

Fantastic Shutters for Better Engine Cooling

As an automotive enthusiast, I have tried several replacements for my Mercruiser Manifold and tried the Flappers Shutters 807166A1 through my rigorous testing .The result speaks for itself: it has outstanding performance that promises better engine cooling even in extreme conditions. I also appreciate that the installation is simple, which saves a lot of time. Admittedly, the product can be a bit pricey, but for its excellent quality, it's worth every penny..

Pros
  • High-quality construction for long-lasting use.
Cons
  • Pricier than some other options on the market.

Revainrating 1 out of 5

Buyer Warning! Don't trust them, buy OEM or equivalent

Boat was used for a weekend and it has held up. If it ruptured completely, it could cause an exhaust jam and catastrophic damage.

Pros
  • Engine cooling and climate control
Cons
  • Almost never