MERCURY 3978455N Straight Inline Cylinder Gm Engine Flywheel 160 Wheel
fits model: Marine, Mercruiser. make: Mercury.
( Manufacturer Part Number: 3978455N ), ( Part Type: Hp Cylinder Engine Flywheel Wheel ), ( Country Of Origin: United States )
Review MERCURY 160 Hp Straight Inline Cylinder Gm Engine Flywheel Fly Wheel fits MERCRUISER MARINE
The Mercury 160 HP Straight Inline Cylinder GM Marine Engine Flywheel is an essential component of your marine propulsion system. This flywheel, specifically Mercury part number 3978455, is designed to provide optimal power transfer from the engine to the drivetrain, ensuring efficient and smooth operation of your marine vessel.
Constructed from high-strength, durable materials, this Mercury flywheel is engineered to withstand the rigors of continuous marine use. It features a precision-balanced design that minimizes vibration and reduces noise, providing a more comfortable and quieter boating experience for you and your passengers.
The Mercury 160 HP Straight Inline Cylinder GM Marine Engine Flywheel is compatible with Mercury 160 HP engines, including those with the Mercruiser brand name and GM Marine engine designation. It is engineered to meet the specific requirements of these engines, ensuring a perfect fit and reliable performance.
The flywheel's outer diameter measures approximately 19.2 inches (48.8 cm), while the inner diameter of the engine crankshaft hub is around 6.5 inches (16.5 cm). The flywheel weighs around 45 lbs (20.4 kg), which is typical for a high-performance marine engine of this size.
The Mercury 3978455 flywheel is designed for use with a conventional propeller shaft and is typically installed between the engine and the transmission or direct drive system. It features a smooth, flat surface for easy coupling with other components, ensuring a secure and reliable connection.
Made to Mercury's exacting standards, this flywheel is built to deliver the power, efficiency, and reliability you expect from a leading marine engine manufacturer. Whether you're cruising the open waters or powering through rough seas, the Mercury 160 HP Straight Inline Cylinder GM Marine Engine Flywheel is the ideal choice for your marine power needs.
Mercury Marine's 160 HP 3.4L Straight Inline Cylinder GM Engine (Part Number: 3978455) is a popular choice for those seeking reliable and powerful outboard engines for their watercraft. However, like any other engine, it comes with its pros and cons.
Pros:1. Power: The Mercury 160 HP engine delivers impressive power, enabling faster speeds and better acceleration for watercraft.
2. Fuel Efficiency: Compared to other engines in its class, the Mercury 160 HP engine is relatively fuel-efficient, helping to save on operating costs.
3. Durability: Mercury Marine is known for its robust and durable engines, which can withstand the rigors of frequent use and harsh marine environments.
4. Versatility: The engine is suitable for a wide range of watercraft, from small boats to larger vessels, providing flexibility for various applications.
Cons:1. Cost: The Mercury 160 HP engine is more expensive than some other engines in its class, which might be a deterrent for some buyers.
2. Maintenance: Like all engines, the Mercury 160 HP engine requires regular maintenance to ensure optimal performance and longevity. This can include tasks like oil changes, fuel filter replacements, and cooling system checks.
3. Weight: The engine's power and durability come at a cost weight. The Mercury 160 HP engine is heavier than some other engines in its class, which can impact the overall weight and performance of the watercraft.
Ending Conclusion:The Mercury 160 HP 3.4L Straight Inline Cylinder GM Engine (Part Number: 3978455) offers impressive power, fuel efficiency, durability, and versatility. However, it comes with higher costs, maintenance requirements, and added weight. Ultimately, the decision to purchase this engine depends on your specific needs, budget, and preferences. If power, reliability, and versatility are top priorities, the Mercury 160 HP engine is an excellent choice. However, if cost and weight are major concerns, you may want to explore other engine options.
Recommendation:If you are in the market for a powerful, reliable, and versatile outboard engine and have the budget for it, the Mercury 160 HP 3.4L Straight Inline Cylinder GM Engine (Part Number: 3978455) is an excellent choice. Its impressive power output, fuel efficiency, and durability make it a popular option for various watercraft applications. However, if you're on a tight budget or prioritize lighter weight, you may want to consider other engine options that might better suit your needs.
Details:
Part was removed from a MerCruiser 160 Hp inline 6 cylinder Marine engine. Mounting hardware is only included if it shown in the pictures. Thanks -Mike. Condition: Good used condition.
Please look at all pictures and read entire before buying. What you see in the pictures is what get. Look at pictures closely and ask any questions, I try to describe parts as best can. Shelf 24-15-4-B.
I will do my best to resolve the issue.
part #: 3978455n prices
- $20.00-$124.50
specifications otsterndriv:
- for models: Marine, Mercruiser
- for makes: Mercury
- mpn: 3978455n
- part type: Hp Cylinder Engine Flywheel Wheel
- country of origin: United States
seller otsterndriv:
- # reviews: 111392
- city: Huron, Ohio
- rating: 99.4%
offer otsterndriv:
- availability: In Stock
- quantity: 1
- options: Ship-to-home
- started: October 29, 2025
- sold: 0
payments otsterndriv:
- other
- wallet: Apple-pay
- credit card: Diners-club
shipping otsterndriv:
- service: FedEx Ground / FedEx Home Delivery, UPS Ground, USPS Ground Advantage, FedEx 2Day
- class: Standard, Expedited
- type: Calculated
- transit: 2-6 Days
- carrier: FedEx, UPS, USPS
- cost: $34.27
general otsterndriv:
- Boat Parts > Sterndrive Motors Components > Other
- condition: Used
returns otsterndriv:
- paid by: Buyer
- policy: Returns Accepted
- time: 30 Days
Mercury 3978455N Is Similar To:
- 862365 Mercury Mercruiser Mag Horizon Ho Engine Cover Like New Near (43.6% similar) Decals are in great condition. A few small scratches. In great near perfect condition...(October 14th, 2018)
- 10-35366 Mercury Mercruiser Stern Drive Engine Screw (48.3% similar) New oem part...(October 25th, 2018)
- 10-42253 Mercury Mercruiser Alpha Bravo Stern Drive Pivot Bolt (41.5% similar) Ii 0D469859 thru 0F679999 mercruiser alpha one gen. Cat new oem part. Mercury pivot bolt this bolt is for use on various mercruiser stern drives. Feel free to call and order. Ii 0F680000 thru 0K999999 mercruiser alpha one gen. Fits:alpha one gen...(September 29th, 2018)
- 10-49956 Quicksilver Mercury Mercruiser Bravo Alpha Oil Pan Drain Screw (35.7% similar) Quicksilver drain screw for use on many mercruiser, bravo alpha stern drive engines. Over 100 mercruiser stern drives use this oil pan drain plug...(October 1st, 2018)
- 10-59645 Quicksilver Mercury Mariner Mercruiser Alpha Bravo Screw (35.8% similar) New oem part. 750FOR various mercury mariner outboard and mercruiser stern drive engines. Quicksilver screw...(October 23rd, 2018)
- 10-805611 Quicksilver Mercury Mercruiser Bravo Manifold Bolt (36.9% similar) 4l related part numbers: number quicksilver bolt for use on 4l V-8 gm mercruiser bravo ii stern drive engines from mercury 2 v8...(October 7th, 2018)
- 105255 Mercruiser Mercury Trim Tilt Pump Solenoid (30.1% similar) It is in good working condition. It comes as pictured. Trim pump this is a used mercruiser with 1 solenoid as pictured. The return line hole appears to be stripped, see pictures...(September 30th, 2018)
- 105921 Mercury Power Trim Pump Works Tested Mercruiser (25.2% similar) Good used condition working order...(January 23rd, 2019)
- 105932 Mercury Power Pump Mercruiser Sterndrive (37.5% similar) ...(October 20th, 2018)
- 11-32522 Mercury Pack Of Mercruiser Vintage Gimbal Splined Nut (36.5% similar) Part number mercury marine splinted screw nut transom plate to gimbals housing new oem factory that is now obsolete. For use on vintage mercruiser stern drive engines from fits: I thru IA Ibo ICC package of...(February 18th, 2019)
- 11-41527t 41527 Mercury Mercruiser Alpha Stern Drive Nut Nla (40.8% similar) For use on mercruiser stern drive engines from fits: alpha one SS all thru none SAM ii iii iv v trs up cat mercury marine lock nut new oem factory part that is now obsolete...(October 6th, 2018)
