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MERCURY 4 HP 4MLH

BRAND: MERCURY
PRODUCT CODE: 4MLH
AVAILABILITY: In Stock

$1,200.00

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Availability: In Stock

4 hp outboard motor

Perfect choice for small fishing boats, small to medium sized inflatables and sailboats. The 58 lb. Mercury 4 HP outboard engine model # 4MLH is compact, lightweight, and comes equipped with the 20 inch long shaft, manual start, tiller steering, and full forward-neutral-reverse gears and the twist grip throttle. Mercury 4hp models feature an integrated fuel tank for true portability. External tank connection is standard which makes adding an external fuel tank and line quick and easy.

  • Compact and Lightweight
  • Digital CD Ignition with Spark Advance
  • High Grade Marine Alloy Construction
  • Stainless Steel Water Pump Housing
  • Zinc Coated Water Passages
  • Rated for Saltwater Use
  • Sacrificial Zinc Anodes
  • Forward-Neutral-Reverse Gear Shift
  • Adjustable Steering Tension Control
  • Forward Mounted Gear Shift Selector
  • Twist-Grip Throttle with Tension Control
  • Integrated Carry Handle
  • Thermostat Controlled Water Cooling
  • Shallow Water Drive; 6 Trim Positions
  • Quiet Through-Propeller-Hub Exhaust
  • 1.15 Liter (.30 Gallon) Integral Fuel Tank
  • Start-In-Gear Protection
  • Low Oil Pressure Warning Indicator
  • ESG Over-Rev Protection
  • Safety Lanyard Stop Switch
  • Owner’s Manual
  • Mercury Marine 3-Year Warranty
  • Mercury 4 hp outboard motor

    Choosing the right outboard for your tender is never easy. Most boat owners have medium-sized boats that usually come equipped with a tender from 2 to 3.5 meters in length. As a result, for reasons of space and convenience, everybody want a lightweight powerful outboard that can be also easy-to-handle and reliable. Characteristics that are not always able to get along with each other.

    We have tested an engine that has proved to be an appropriate option: the Mercury 4 HP FourStroke.

    The test of the 4 hp outboard motor

    I drive to the Marina di Varazze to carry out my test and, once there, I climb on board the Daydreamer, the lab-boat of The International Yachting Media. The tender is housed forward and I hasten to put it into water. The outboard – our Mercury 4 HP Fourstroke – instead, is positioned on the wooden platform on the stern. In order to test its handling, I raise it up and I take it from the boat to the tender.

    The Daydreamer is a real lady of the sea, she is 30 years old and her transom, in accordance with the design of her time, is very vertical. Consequently, I can’t get directly the tender, so I opt for the jetty alongside which the tender is docked.

    The Mercury 4 HP FourStroke weights 25 kg. It’s not an excessive load, so I put it on my shoulders and I walk down the walkway. With proper attention, it’s a feasible operation that doesn’t require any extreme efforts.

    Mercury 4HP FourStroke, startingMercury 4HP FourStroke, starting 2

    I lean the engine against the jetty. This, too, is a good reliability test. Often, indeed, outboards, when left in horizontal position, start with difficulty. I climb on board the tender, I raise the 4 HP engine up and put it in place, tightening the two fastening screws.

    In this case, too, I have done all by myself. Just the time to make sure that the fuel lever, air and the breather cap on the fuel tank are open and I try to start the outboard. Starting is manual and our Mercury starts with the third shot. An excellent result if we consider that it was not started for a long time and I have just “shaken” it vigorously.

    Now, I just want to simulate the typical situation where a tender is used. So, I invite another person to climb on board with me. I calculate that our overall weight is about 130 kg and establish that this will the total load which the 4 HP will have to face with. I engage gear and go.

    Mercury 4HP FourStroke, navigationThe tender used for our test is a Med Easy Tender 310 with inflatable V-keel and a total weight of 32 kg. A “large” size whose maximum power is more than twice the power at out disposal. Sure, it will enable us to enjoy all the power of the Mercury 4 HP outboard. But will it be enough?

    Yes, it will and I can realize that immediately. The waves I encounter at the mouth of the port is long and residual: I keep it on the beam and, at max RPM, I run at 10 knots.

    I decide to have fun and I put the bow to the waves. With the throttle all forward and with the waves pushing the stern, the boat planes and reaches a speed of 12 knots. At this speed, I note with some surprise that the engine, even at full power, is little noisy.

    Even when I put the bow to the waves, I can keep the engine at the top of the rev range and I record a speed of 9 knots.

    Then, I continue my test with a series of turns. During my accelerations and decelerations, the engine, also thanks to the support of the good tender hull, follows me brilliantly and without any “power gaps”.

    Sailing back to the port, I focus on speed measurements at medium and low revs. With the throttle in its medium position, I reach 7.5 knots while, with the engine idling, I run at little more than 3 knots. The engine noise is really low and therefore excellent for coastal trolling.

    To dock the tender, I test the reverse gear. So, I move the easy-handling inverter level and engage the gear easily. Manoeuvring is easy and user-friendly. Once the tender is docked alongside the jetty, I leave the engine idling in neutral for a while and I detect no shutdowns.

    Not satisfied of the fun that, I must confess it, I inevitably have every time I’m at the helm of a tender (of every size), I leave the port again. This time, I do that alone; with one hand, I take the rope secured to the bow while, with the other, I hold the accelerator. I move the weight forward and I find myself planing with the 4 HP at 15 knots. A really amazing result.

    Conclusions

    The Mercury 4 HP FourStroke has proved to be reliable, handy and powerful. The speeds recorded during our test make us think that, even if the tender had been at full load, this outboard would have performed well.

    The Mercury 4 HP, thanks to its excellent weight/power ratio, is the ideal option for both medium-sized tenders and small sailboats.

MODEL 4MLH
MODEL YEAR 2020
SKU 4MLH-20
WEIGHT 58.0 lb
MANUFACTURER Mercury
COUNTRY OF MANUFACTURE Japan
HORSEPOWER 4hp
SHAFT LENGTH 20″ (Long)
STEERING Tiller
STARTING Manual
TRIM & TILT Manual
FUEL DELIVERY Carburetor
FUEL TANK Internal
CYLINDER(S) 1
DISPLACEMENT 7.5/123
BORE AND STROKE 2.32 x 1.77
FULL THROTTLE RPM RANGE 4500-5500
IGNITION SYSTEM CDI
INDUCTION SCAVENGING OHV
VALVES PER CYLINDER 2
FUEL TYPE 87 Octane (up to 10% ethanol content)
FUEL TANK / FUEL LINE 0.3 US Gallon (1.15 liter)
OIL TYPE SAE 10W-30 (Mercury 4-Stroke Outboard Oil)
OIL CAPACITY 15 fl. Oz. (450 ml)
LUBRICATION Pressurized wet sump
ALTERNATOR Optional 12V 50W 4A (installation required)
COOLING SYSTEM Water-cooled w/thermostat
SALTWATER RATED Yes
GEAR RATIO 2.15:1
GEAR SHIFT Forward-Neutral-Reverse (forward mounted shift lever)
PROPELLER 7.7″ Diameter X 7.0″ Pitch 3-Blade Aluminum

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