Skip to content Skip to navigation menu
Live Chat

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, clean running, 40% more fuel efficient than comparable 2-stroke engines, exceptional idling
  • Exhaust: Though prop
  • Start: Manual, with decompression system
  • Steering Type: Tiller
  • 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.

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 1F04201EK
In stock online.

$1,369.00

Add to My List
4hp 4-Stroke Outboard, 57lb., 20" Shaft Length, F-N-R Gearing, Integral Tank, 0.39 Gallon Tank 1240753 1F04211EK
In stock online.

$1,389.00

Add to My List
6hp 4-Stroke Outboard, 55lb., 15" Shaft Length, F-N-R Gearing, Integral Tank, 0.3 Gallon Tank 1182278 1FX6201EK
In stock online.

$1,769.00

Add to My List
6hp 4-Stroke Outboard, 57lb., 20" Shaft Length, F-N-R Gearing, Integral Tank, 0.3 Gallon Tank 1182310 1FX6211EK
In stock online.

$1,779.00

Add to My List

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, clean running, 40% more fuel efficient than comparable 2-stroke engines, exceptional idling
  • Exhaust: Though prop
  • Start: Manual, with decompression system
  • Steering Type: Tiller
  • 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.

Specs

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.

REVIEW SNAPSHOT®

by PowerReviews
Mercury Marine4hp & 6hp 4-Stroke Outboards
 
3.5

(based on 15 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (3)

71%

of respondents would recommend this to a friend.

Pros

  • Easy to use (7)
  • Compact (4)

Cons

No Cons

Best Uses

  • Boating / sailing (7)
    • Reviewer Profile:
    • Casual/ recreational (6), Advanced (5)
    • Was this a gift?:
    • No (4)

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 15 customers

Displaying reviews 1-10

Back to top

Previous | Next »

(6 of 6 customers found this review helpful)

 
2.0

Performs well if you can get it started

By Ed

from Amelia Island Florida

About Me Advanced

Verified Reviewer

Pros

  • Easy to flush

Cons

  • Unreliable
  • Very difficult to start

Best Uses

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

    The 4Hp Mercury Outboard is a very nice looking motor and the flushing feature is extremely nice especially in a saltwater environment. When it is running it performs very well and is operates nicely on my sailboat. The problem is it is very very difficult to get the motor started when cold and very difficult on a re-start. None of the starting directions seem to work. The motor has less than 1 hour of operational time and has been to the shop to have the carburetor serviced which has made no difference.

    • Was this a gift?:
    • No

    (2 of 2 customers found this review helpful)

     
    4.0

    Solid Upgrade

    By S/V Priya

    from Seattle

    About Me Advanced

    Verified Buyer

    Pros

    • Easy To Use
    • Good power
    • Light Weight
    • Quiet

    Cons

      Best Uses

      • Boating

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

      This motor is better in every way than the 12-year-old Honda 5hp 4-stroke it replaced. It's lighter, quieter and has less vibration. It's more than the 20% power increase I expected moving to 6hp. It's easier to start and shift. The only negative so far is that it cavitates when planing on my 10' Achilles, even though the fit is within the tolerance specified in the manual.

      • Was this a gift?:
      • No

      (4 of 4 customers found this review helpful)

       
      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

          (17 of 18 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.

          (7 of 11 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.

              (11 of 11 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

                (8 of 8 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.

                  (8 of 25 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

                  (11 of 11 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.

                  Displaying reviews 1-10

                  Back to top

                  Previous | Next »