1. Boat Parts In Otsterndriv Sterndrive Prices For Sale.
  2. sku: 3687298655222772
  3. MERCURY MARINE 864309-C

MERCURY MARINE 864309-C Gm Vortec Boat Engine Exhaust Riser 5.0 Manifold

fits model: 305, Mercruiser. make: Mercury.

864309-c Mercury Marine Mercruiser 5.0 L 305 Gm Vortec Boat Engine Exhaust Manifold Riser

( Brand: Mercury Marine ), ( Manufacturer Part Number: 864309-C ), ( Part Type: Engine Exhaust Manifold ), ( Country/region Of Manufacture: United States )

Review MERCURY MARINE 5.0 Gm Vortec Boat Engine Exhaust Manifold Riser fits MERCRUISER 305

Introducing the Mercury Marine 864309-C Mercruider 5.0 305 GM Vortec Boat Engine Exhaust Manifold Riser, a premium component designed to enhance the performance and durability of your boat engine's exhaust system. This manifold riser, manufactured by Mercury Marine, the leading name in marine propulsion, is engineered specifically for the 5.0 Liter 305 GM Vortec engine.

The Mercury Marine 864309-C is meticulously crafted using high-quality materials to withstand the harsh marine environment. Its robust construction is achieved through the use of corrosion-resistant materials, including aluminum alloy, ensuring that it can withstand the corrosive effects of saltwater and prolonged exposure to the sun.

This exhaust manifold riser is designed to provide a secure connection between the exhaust manifold and the engine's exhaust system. It features a tapered design that facilitates a smooth and efficient exhaust flow, reducing backpressure and maximizing engine performance. The tapered design also ensures a snug fit, minimizing the risk of leaks and exhaust gas escaping.

The Mercury Marine 864309-C comes with pre-drilled holes, making it easy to install. It is compatible with both factory and aftermarket exhaust systems, providing flexibility and versatility for boat owners. The riser is engineered to meet or exceed OEM specifications, ensuring a perfect fit and seamless integration with your engine.

Additionally, this manifold riser features a polished finish, adding a touch of elegance and style to your engine compartment. The polished surface also helps to reflect heat, keeping the engine compartment cooler and more comfortable for passengers.

In summary, the Mercury Marine 864309-C Exhaust Manifold Riser is a must-have component for boat owners looking to enhance their engine's performance and durability. With its robust construction, efficient design, easy installation, and stylish finish, this manifold riser is a smart investment for anyone looking to get the most out of their marine engine.

Pros and Cons of Buying Mercury Marine 864309-C/Mercruiser 5.0 305 GM Vortec Boat Engine Exhaust Manifold Riser

1. Pros:

a. Compatibility: This exhaust manifold riser is specifically designed for Mercury Marine and Mercruiser 5.0 305 GM Vortec boat engines, ensuring a perfect fit and seamless integration.

b. Improved Performance: The riser design helps to reduce exhaust gas turbulence, which can lead to improved engine performance and fuel efficiency.

c. Durability: Made from high-quality materials, this exhaust manifold riser is built to withstand the harsh marine environment, providing long-lasting reliability.

d. Easy Installation: The riser comes with clear installation instructions, making it a relatively straightforward process for boat owners to install it themselves or have it installed by a professional.

2. Cons:

a. Cost: Compared to some aftermarket exhaust manifold risers, the Mercury Marine 864309-C/Mercruiser 5.0 305 GM Vortec boat engine exhaust manifold riser may be priced higher due to its brand name and OEM design.

b. Limited Availability: Since it is an OEM part, it may be more difficult to find in local retail stores and may require ordering through a dealership or online marketplaces.

Conclusion:

The Mercury Marine 864309-C/Mercruiser 5.0 305 GM Vortec boat engine exhaust manifold riser offers several advantages, such as improved engine performance, compatibility, durability, and ease of installation. However, it comes with a higher cost compared to some aftermarket alternatives and may have limited availability.

Recommendation:

If you own a Mercury Marine or Mercruiser 5.0 305 GM Vortec boat engine and are looking for a reliable exhaust manifold riser that is specifically designed for your engine, the Mercury Marine 864309-C/Mercruiser 5.0 305 GM Vortec boat engine exhaust manifold riser is a solid choice. While it may cost more than some aftermarket alternatives, its OEM design, compatibility, and durability make it a worthwhile investment for boat owners seeking optimal engine performance and reliability.

Details:

Mounting hardware is only included if it shown in the pictures. Condition: Good used condition. Look at pictures closely and ask any questions, I try to describe parts as best can. Please look at all pictures and read entire before buying.

Shelf 30-7-7-B. I will do my best to resolve the issue. Part was removed from a 2002 MerCruiser 5.0 L 305 GM Vortec Marine engine. Thanks -Mike.

What you see in the pictures is what get.

part #: 864309 prices

  • $274.97-$429.00

specifications otsterndriv:

  • for models: 305, Mercruiser
  • for makes: Mercury
  • brand: Mercury Marine
  • mpn: 864309-c
  • part type: Engine Exhaust Manifold
  • country/region of manufacture: United States

payments otsterndriv:

  • wallet: Google-pay
  • other
  • credit card: Discover

offer otsterndriv:

  • sold: 0
  • quantity: 2
  • availability: In Stock
  • started: June 20, 2025
  • options: Ship-to-home

seller otsterndriv:

  • city: Huron, Ohio
  • # reviews: 105422
  • rating: 99.2%

shipping otsterndriv:

  • service: FedEx Ground or FedEx Home Delivery, UPS Ground, USPS Ground Advantage, FedEx 2Day
  • transit: 4-10 Days
  • class: Standard, Expedited
  • cost: $29.58
  • type: Calculated
  • carrier: FedEx, UPS, USPS

general otsterndriv:

  • Boat Parts > Sterndrive Motors Components > Other
  • condition: Used

returns otsterndriv:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer
for models: 305, mercruiser, for makes: mercury, part type: engine exhaust manifold, country/region of manufacture: united states,
category: boat parts > sterndrive components, sku: 3687298655222772,
Mercury Marine 864309 Is Similar To:
otsterndriv logo
5 offers $274.97–$429.00 USD
  • New other (see details). Offer #1 priced at $375.00 + $93.46 shipping estimate = $468.46* total. The rates shown are the cost of transport only. Help & FAQ.+$93.46 shipping
  • New. Offer #2 priced at $274.97 + $0.00 shipping estimate = $274.97* total. If your engine was manufactured in 2005 or later (Serial Number 0W310000 and up), you likely require the 14-degree riser (OEM 864591T02).FREE SHIPPING
  • New. Offer #3 priced at $429.00 + $61.73 shipping estimate = $490.73* total. +$61.73 shipping
  • New. Offer #4 priced at $1349.00 + $150.00 shipping estimate = $1499.00* total. They are painted and individually leak tested These risers are 6.75" tall.+$150.00 shipping
  • New other (see details). Offer #5 priced at $350.00 + $27.50 shipping estimate = $377.50* total. For corrosion protection it is hot dipped and powder coated.+$27.50 shipping

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