MERCURY MARINE 3851700 Cylinder Gm Boat Engine Raw Sea Water 3.0 Pump

( Brand: Mercury Marine ), ( Manufacturer Part Number: 3851700 ), ( Part Type: Cylinder Engine Pump ), ( Country/region Of Manufacture: United States )

Review MERCURY MARINE Omc Volvo Penta 3.0 Cylinder Gm Boat Engine Raw Sea Water Pump

Introducing the Mercury Marine 3851700 OMC Volvo Penta 3.0 Cylinder Raw Water Pump, an essential component for your marine engine's cooling system. This high-performance pump is engineered to deliver efficient and reliable water circulation for your GM boat engine.

The Mercury Marine 3851700 OMC Volvo Penta Raw Water Pump is a 3.0 cylinder design, which means it has three impellers to increase the volume of water being circulated. It is specifically designed for raw water applications, making it suitable for use in saltwater environments without the need for additional protection.

This pump features a durable cast iron housing that is both sturdy and corrosion-resistant, ensuring long-lasting performance even in the harshest marine conditions. It also comes with a heavy-duty impeller shaft made of brass, which provides excellent strength and resistance to wear and tear.

The pump's sealing system is designed to prevent leaks and ensure optimal water flow. It features a double-lip, labyrinth-style seal that creates a tight barrier against water leakage. Additionally, the pump comes with a spare seal kit for added convenience and peace of mind.

The Mercury Marine 3851700 OMC Volvo Penta Raw Water Pump is easy to install and maintain. It comes with all necessary hardware for installation, including bolts, gaskets, and a water inlet/outlet adapter. The pump also features a convenient access cover for easy maintenance and inspection.

Overall, the Mercury Marine 3851700 OMC Volvo Penta 3.0 Cylinder Raw Water Pump is an excellent choice for boat owners looking for a high-performance, reliable, and corrosion-resistant water pump for their GM boat engine. Its durable construction, efficient design, and easy installation make it a must-have addition to your marine engine's cooling system.

The Mercury Marine 3851700 OMC Volvo Penta 3.0 cylinder raw sea water pump is a popular choice for marine applications due to its durability and reliability. Here are some pros and cons that might help you make an informed decision about purchasing this engine pump.

1. High-performance: This pump is designed to handle the rigorous marine environment, making it an ideal choice for boat owners who want a high-performance and efficient water cooling system.

2. Durable: Made from high-quality materials, this pump can withstand the corrosive effects of saltwater and the extreme temperatures found in marine applications.

3. Easy installation: The pump comes with a pre-assembled impeller and a machined shaft seal, making it easier to install and reducing the need for additional parts.

4. Reliable: Volvo Penta is known for its reliable engines, and the same holds true for their pumps. The Mercury Marine 3851700 pump is no exception, with a proven track record of longevity and durability.

5. Versatile: This pump can be used for a variety of marine applications, including outboard engines, sterndrive applications, and I/O applications.

1. Price: The Mercury Marine 3851700 pump is more expensive than some other aftermarket pumps. However, the higher cost may be justified by its superior performance and durability.

2. Weight: This pump is heavier than some other aftermarket pumps, which could make it more difficult to install or transport.

3. Limited availability: This pump may not be readily available at all marine supply stores, making it necessary to order it online or through a specialized marine parts supplier.

The Mercury Marine 3851700 OMC Volvo Penta 3.0 cylinder raw sea water pump is a high-performance and reliable option for marine applications. Its durability, easy installation, and versatility make it an excellent choice for boat owners who demand the best from their water cooling systems. While it may be more expensive and heavier than some other aftermarket pumps, its superior performance and reliability may justify the additional cost.

If you're looking for a high-performance and reliable raw sea water pump for your marine application, the Mercury Marine 3851700 OMC Volvo Penta 3.0 cylinder pump is an excellent choice. Its proven track record of durability, easy installation, and versatility make it worth the investment. However, be prepared for a higher cost and a heavier weight than some other aftermarket pumps. If budget is a concern, you may want to consider other options, but keep in mind that you may sacrifice some performance and durability.

Details:

What you see in the pictures is what get. Mounting hardware is only included if it shown in the pictures. I will do my best to resolve the issue. Look at pictures closely and ask any questions, I try to describe parts as best can.

Condition: Good used condition. Shelf 23-7-3-C. Please look at all pictures and read entire before buying. Part was removed from a Volvo Penta 3.0 L Marine engine.

Thanks -Mike.

part #: 3851700 prices

• $65.79-$80.49

specifications otsterndriv:

• for makes: Omc, Volvo, Penta, Mercury
• brand: Mercury Marine
• mpn: 3851700
• part type: Cylinder Engine Pump
• country/region of manufacture: United States

general otsterndriv:

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

offer otsterndriv:

• availability: In Stock
• started: October 8, 2025
• sold: 0
• quantity: 1
• options: Ship-to-home

returns otsterndriv:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

seller otsterndriv:

• rating: 99.4%
• # reviews: 109780
• city: Huron, Ohio

shipping otsterndriv:

• transit: 2-7 Days
• type: Calculated
• class: Standard, Expedited
• cost: $21.65
• carrier: FedEx, USPS
• service: FedEx Ground / FedEx Home Delivery, USPS Ground Advantage, USPS Priority Mail

payments otsterndriv:

• wallet: Apple-pay
• other
• credit card: Visa

Mercury Marine 3851700 Is Similar To:

• 862365 Mercury Mercruiser Mag Horizon Ho Engine Cover Like New Near (34.4% 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 (36.9% similar) New oem part...(October 25th, 2018)
• 12-42256 Quicksilver Mercury Mercruiser Bravo Engine Thrust Washer (38.7% similar) Quicksilver thrust washer...(September 23rd, 2018)
• 12-46765 Green Bay Prop Mercury Mariner Mercruiser Marine Washer (37.9% similar) New old stock J6...(September 17th, 2018)
• 12419 12419t Quicksilver Mercury Mariner Marine Gauge Sender Cover (32.3% similar) Quicksilver cover this sender cover is for use on various Mercury Marine engines. Cat new oem part...(September 20th, 2018)
• 13051a4 Mercury Marine Actuating Shift Arm Lever (38% similar) ...(September 30th, 2018)
• 1589 1589-865440c01 Mercury Mercruiser Bravo Marine Upper Sterndrive Driveshaft Housing (27.1% similar) Make your very best offer. This item unit is recommended for someone mechanical in the commercial line of who can part out or service, install it and maintain its future service life. All my sales are not final until paid. Please view item pictures closely carefully. E please be vigilant and mindful...(September 18th, 2018)
• 15995 Mercruiser Mercury Water Temperature Sender Alpha One (21.6% similar) Mercury 224 I l4 0B774252 up Mercuries Mercury 224 I l4 thru 0B434940 Mercuries bbl. New Mercury quicksilver part in its original plastic packaging. Water temperature sender for the exhaust group on the following Mercuries stern drives use this temp sender. Mercury 224 I l4 0B775249 up Mercuries cat...(December 15th, 2018)
• 18643a5 Mercury Engine Coupler Mercruiser Gen (28.4% similar) I can ship this out for free anywhere in continental USA...(September 22nd, 2018)
• 19-34271 Mercury Quicksilver Cylinder Block Plug For Mercruiser Stern Drive Oem (40.5% similar) Quicksilver cylinder block 2 expansion plug fits too many Mercuries stern drive engines to list. JESS-720 cat...(September 26th, 2018)
• 19-34272 Mercury Quicksilver Cylinder Block Plug For Mercruiser Stern Drive Oem (40.5% similar) Jess quicksilver cylinder block expansion plug fits too many Mercuries stern drive engines to list. Feel free to call and order...(October 17th, 2018)