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MERCURY MARINE 4hp & 6hp 4-Stroke Outboards

Mercury Marine’s 4-stroke technology consumes 40% less fuel than 2-stroke models for extraordinary value and savings

Engines surpass California Air Resources Board (CARB) 3-Star Rating, making them some of the cleanest running on the market-with 91% less emissions than traditional 2-stroke outboards!

The inherent 4-stroke characteristics of ultra-quiet, smoke-free operation, plus smooth idling and running make these engines a natural choice whether you’re trolling for fish or out just for fun. Clean running 4-stroke engines from 2.5 to 20hp have a CARB three-star, ultra-low emissions rating. The decompression system and electronic CD ignition design ensure an easy, reliable start. One-stage over-rev protection and low oil pressure warning system provide extra peace of mind. Exclusive multifunction tiller handle on the 8hp and 9.9hp models features shift, steering, throttle, throttle friction, and stop controls for convenient one-hand operation. Available in manual-tilt, gas-assist and power-trim. All models are sold with a propeller.

  • Engine Type: 4-stroke
  • Features: 4-stroke technology-quiet, environmentally friendly, 40% more fuel efficient than comparable 2-stroke engines, smooth running/exceptional idling
  • Exhaust: Though prop
  • Start: Manual, with decompression system
  • Steering Type: Tiller
  • Warranty: Five years
  • For U.S. shipment ONLY

4hp & 6hp 4-Stroke Outboards

  • A standard automatic cylinder decompression system greatly reduces starting pull force for effortless starting
  • The 4 hp model delivers ultimate portability with its integrated fuel tank and shut-off valve to prevent fuel spillage
  • A full forward-neutral-reverse side shift is standard
  • Gearing: F-N-R, 2.15:1
  • Trim Positions: 6, plus shallow-water drive
  • Tank Type: Integral fuel tank (gal / L)

Note: These Mercury outboards have 4-stroke engines and, like virtually all 4-stroke engines, depend on oil in their crankcases for lubrication. To prevent the oil from leaking during transport, the engines are not shipped with oil in their crankcases. You must put the correct amount and grade of oil in the crankcase prior to the first use or you will cause extensive damage to your engine, which is not covered by your engine’s warranty. Please read the owner’s manual for more information.

For U.S. shipment ONLY.

Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
4hp 4-Stroke Outboard, 55lb., 15" Shaft Length, F-N-R Gearing, Integral Tank, 0.3 Gallon Tank 1182237 1F04201FK
In stock online.

$1,359.00

4hp 4-Stroke Outboard, 57lb., 20" Shaft Length, F-N-R Gearing, Integral Tank, 0.39 Gallon Tank 1240753 1F04211FK
In stock online.

$1,379.00

6hp 4-Stroke Outboard, 55lb., 15" Shaft Length, F-N-R Gearing, Integral Tank, 0.3 Gallon Tank 1182278 1F06201FK
In stock online.

$1,759.00

6hp 4-Stroke Outboard, 57lb., 20" Shaft Length, F-N-R Gearing, Integral Tank, 0.3 Gallon Tank 1182310 1F06211FK
Ships when available.

$1,769.00

Product Description

Mercury Marine’s 4-stroke technology consumes 40% less fuel than 2-stroke models for extraordinary value and savings

Engines surpass California Air Resources Board (CARB) 3-Star Rating, making them some of the cleanest running on the market-with 91% less emissions than traditional 2-stroke outboards!

The inherent 4-stroke characteristics of ultra-quiet, smoke-free operation, plus smooth idling and running make these engines a natural choice whether you’re trolling for fish or out just for fun. Clean running 4-stroke engines from 2.5 to 20hp have a CARB three-star, ultra-low emissions rating. The decompression system and electronic CD ignition design ensure an easy, reliable start. One-stage over-rev protection and low oil pressure warning system provide extra peace of mind. Exclusive multifunction tiller handle on the 8hp and 9.9hp models features shift, steering, throttle, throttle friction, and stop controls for convenient one-hand operation. Available in manual-tilt, gas-assist and power-trim. All models are sold with a propeller.

  • Engine Type: 4-stroke
  • Features: 4-stroke technology-quiet, environmentally friendly, 40% more fuel efficient than comparable 2-stroke engines, smooth running/exceptional idling
  • Exhaust: Though prop
  • Start: Manual, with decompression system
  • Steering Type: Tiller
  • Warranty: Five years
  • For U.S. shipment ONLY

4hp & 6hp 4-Stroke Outboards

  • A standard automatic cylinder decompression system greatly reduces starting pull force for effortless starting
  • The 4 hp model delivers ultimate portability with its integrated fuel tank and shut-off valve to prevent fuel spillage
  • A full forward-neutral-reverse side shift is standard
  • Gearing: F-N-R, 2.15:1
  • Trim Positions: 6, plus shallow-water drive
  • Tank Type: Integral fuel tank (gal / L)

Note: These Mercury outboards have 4-stroke engines and, like virtually all 4-stroke engines, depend on oil in their crankcases for lubrication. To prevent the oil from leaking during transport, the engines are not shipped with oil in their crankcases. You must put the correct amount and grade of oil in the crankcase prior to the first use or you will cause extensive damage to your engine, which is not covered by your engine’s warranty. Please read the owner’s manual for more information.

For U.S. shipment ONLY.

West Advisor

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REVIEW SNAPSHOT®

by PowerReviews
Mercury Marine4hp & 6hp 4-Stroke Outboards
 
3.6

(based on 13 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (3)

75%

of respondents would recommend this to a friend.

Pros

  • Easy to use (6)
  • Compact (4)

Cons

No Cons

Best Uses

  • Boating / sailing (6)
    • Reviewer Profile:
    • Casual/ recreational (6), Advanced (3)

Most Liked Positive Review

 

Solid Motor

I bought this motor after returning a totally unreliable, but compact and light 3.5hp Mercury that would regularly quit and not restart. This 6hp Mercury is heavier than I wanted (20 lbs more...Read complete review

I bought this motor after returning a totally unreliable, but compact and light 3.5hp Mercury that would regularly quit and not restart. This 6hp Mercury is heavier than I wanted (20 lbs more than the smaller motor) but starts easily and runs reliably. It has additional nice features such as both internal and (extra cost) external tanks and reverse shift. I strongly suggest you seek out non ethanol fuel for any small outboard. They are approved for ethanol but that's not ideal. With the external tank it's easy enough to locate a gas station that has the good stuff.

My comments about the motor weight (57 lbs) has to do with its use on our RIB tender for our trawler and the need to hoist the tender and motor on davits. Also, I'm 75 and that's starting to show. The weight is probably not a factor for a lot of other users.

VS

Most Liked Negative Review

 

The motor starts easily, ...

The motor starts easily, idles smoothly at very low RPM, unlike a two stroke. There is no need to mix oil with the gasoline. Throttle response is excellent at all power settings. ...Read complete review

The motor starts easily, idles smoothly at very low RPM, unlike a two stroke. There is no need to mix oil with the gasoline. Throttle response is excellent at all power settings. However, since this outboard has only one cylinder there is much vibration during operation, especially low throttle settings. If it weren't for the vibration, this motor would be perfect and rate 5 stars.

Reviewed by 13 customers

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Displaying reviews 1-10

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5.0

So far so good

By 1st timer

from Indianapolis, IN

About Me Beginner

Verified Buyer

Pros

  • Compact Design
  • Easy To Use

Cons

    Best Uses

    • Boating
    • Personal Watercraft

    Comments about 4hp & 6hp 4-Stroke Outboards:

    We put the 6 hp Mecury on an 11 ft inflatable. Nice power after the couple hour breaking in period. So far it has started on 1 or 2 pulls when cold. My first time buying an outboard and a boat, so we'll see how it treats a novice.

    • Was this a gift?:
    • No
     
    5.0

    So far so good

    By 1st timer

    from Indianapolis, IN

    About Me Beginner

    Verified Buyer

    Pros

    • Compact Design
    • Easy To Use

    Cons

      Best Uses

      • Boating
      • Personal Watercraft

      Comments about 4hp & 6hp 4-Stroke Outboards:

      We put the 6 hp Mecury on an 11 ft inflatable. Nice power after the couple hour breaking in period. So far it has started on 1 or 2 pulls when cold. My first time buying an outboard and a boat, so we'll see how it treats a novice.

      • Was this a gift?:
      • No

      (10 of 10 customers found this review helpful)

       
      4.0

      Solid Motor

      By Steve

      from Rochester NY

      About Me Advanced

      Verified Reviewer

      Pros

      • Easy To Use
      • Nice Features
      • Reliable
      • Safe

      Cons

      • Heavy

      Best Uses

      • Boating

      Comments about 4hp & 6hp 4-Stroke Outboards:

      I bought this motor after returning a totally unreliable, but compact and light 3.5hp Mercury that would regularly quit and not restart. This 6hp Mercury is heavier than I wanted (20 lbs more than the smaller motor) but starts easily and runs reliably. It has additional nice features such as both internal and (extra cost) external tanks and reverse shift. I strongly suggest you seek out non ethanol fuel for any small outboard. They are approved for ethanol but that's not ideal. With the external tank it's easy enough to locate a gas station that has the good stuff.

      My comments about the motor weight (57 lbs) has to do with its use on our RIB tender for our trawler and the need to hoist the tender and motor on davits. Also, I'm 75 and that's starting to show. The weight is probably not a factor for a lot of other users.

      (5 of 7 customers found this review helpful)

       
      1.0

      HUGE PROBLEMS WITH THIS MOTOR IN REVERSE

      By MERCURY SINKING

      from JACKSONVILLE, FL

      About Me Casual/ Recreational

      Pros

        Cons

        • Jumps Into Boat In Revers

        Best Uses

          Comments about 4hp & 6hp 4-Stroke Outboards:

          HUGE PROBLEMS WHEN PLACED IN REVERSE. ADJUSTING TILT PIN HAS NO EFFECT. MOTOR BUCKS AND ALMOST JUMPS INTO THE BOAT WHEN PLACED IN REVERSE.

          (7 of 7 customers found this review helpful)

           
          5.0

          Great Little Engine

          By Sunfish B

          from Jersey Shore, NJ

          About Me Advanced

          Verified Reviewer

          Pros

          • Compact Design
          • Easy Storage
          • Easy To Use

          Cons

            Best Uses

            • Inflatable

            Comments about 4hp & 6hp 4-Stroke Outboards:

            Bought the 6hp short shaft four years ago for my 20 foot Coastal Rec Ensenada. Used it for a year with no problems. Sold the motor with the boat. Just bought it back. The person I sold it to put zero time on it. New plug and new gas and it started right up after two years

            (6 of 6 customers found this review helpful)

             
            5.0

            Great Engines

            By Old fisherman

            from Centralia Wa

            About Me Advanced

            Pros

            • Reliable

            Cons

              Best Uses

              • Boating

              Comments about 4hp & 6hp 4-Stroke Outboards:

              I have used a 5 hp Mercury 4 stroke on my boat for a trolling motor for 11 years.Still runs great with between 500-600 hours on it.I would buy another one in a minute.

              (5 of 20 customers found this review helpful)

               
              1.0

              Worst

              By Yamaha lover

              from Bristol ri

              About Me Casual/ Recreational

              Pros

              • Good looking

              Cons

              • Breaks down every year
              • Flimsy
              • Heavy
              • Hot
              • Unreliable

              Best Uses

              • Spare parts

              Comments about 4hp & 6hp 4-Stroke Outboards:

              I used this on my yacht and around rivers it's breaks every single year people told me there were problems with mercurys and I just wouldn't believe them

              Boo mercury
              Go Yamaha

              (8 of 8 customers found this review helpful)

               
              4.0

              A Great Investment

              By Aquaholic

              from Fort Gaines, Georgia

              About Me Casual/ Recreational

              Pros

              • Compact Design
              • Easy To Use
              • Good efficiency

              Cons

              • Cuts off while idling

              Best Uses

              • Boating
              • Fishing
              • Riding

              Comments about 4hp & 6hp 4-Stroke Outboards:

              I received a 12 foot Lowe Jon boat for Christmas with a small trolling motor. We decided to get a a 6 HP engine. We ended up buying it, and I am very satisfied with the purchase. It moves along quite well with 400 pounds of people and gear inside the boat at around 10 MPH. We have run it for a whole day and only used half a tank of gas.(3.2 gal tank) The only problem I have with it is that when idling, it will sometimes sputter and cut off. I now use just a slight bit over idle speed for going under bridges, etc. Overall, a great buy and I am very happy with this product.

              (12 of 13 customers found this review helpful)

               
              4.0

              4HP c/w Intregral Tank

              By Newbie

              from Ontario, Canada

              About Me Casual/ Recreational

              Pros

                Cons

                  Best Uses

                    Comments about 4hp & 6hp 4-Stroke Outboards:

                    I have a 4HP with integral tank that is great for getting my sailboat in/out of port. You can also run it with an external tank, which I do for longer runs (if there is no wind!!). I found it difficult to start when running with the intergral tank until I learned a little trick - keep the vent shut - this seems to help pressurize the fuel system, as you would with the bulb on an external tank. Apart from that the motor runs great! For all I know this may be in the Owners Manual, but who looks at those? ;)

                    (9 of 11 customers found this review helpful)

                     
                    1.0

                    WM sold engine mfg Nov 08 as new 4/11

                    By John

                    from Kingwood Texas

                    About Me Casual/ Recreational

                    Verified Reviewer

                    Pros

                      Cons

                      • Hard to start out of box
                      • Mercury Tech Rep no help
                      • Needs repair on 1st day
                      • Once started leaked gas

                      Best Uses

                        Comments about 4hp & 6hp 4-Stroke Outboards:

                        I wanted to use the 6 hp on my sailboat but right out of the box, in a whole day of trying and a lot of phone calls,and with fresh gas, only got it to run three times. First 2 times only ran 30 seconds and the last time ran continously but developed a bad gas leak from carburetor. Taking for service - will test warranty. [...] nor Mercury Tech rep were any help!

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