2011 Mercury Marine 20 HP

$3,544.00 - Stock Number: 20EPT

Mercury 20 HP 4 Stroke Outboard Motor 15" Shaft - NEW
Remote Control Model - Electric Start - Power Trim

Product Details

Model - 20EPT FourStroke
Condition - New In Box
MSRP - $4,105
Your PriceMercury Outboards$3,544

All outboards 25hp and larger or any Remote Control Model may NOT be shipped due to manufacturer restrictions. Tiller handle (hand driven) models 25hp and larger must be picked up at our location. Remote Steering/Control models must be installed on your boat at our Millsboro, DE location. Engines are installed while you wait and generally do not require an overnight stay. Prices below include taxes and installation. Contact us to purchase and schedule an appointment for pickup/installation. Controls, Cables, Parts and Labor to rigg engine is at an additional cost.

3 YEAR WARRANTY - PDI Installation should be performed by a Certified Mercury Dealer to Validate Warranty

Controls not included, sold at an additional cost.

What's In The Box:

  • Fuel Tank (6.6 gal)
  • Owner's Manual
  • Mercury 3-Year Warranty
  • Aluminum Propeller
  • Mercury 4-Stroke Oil
  • Tool Kit

Please Call STEVE STEARN if you have any questions on this motor or for a QUOTE ON SHIPPING & other motors.

SAE 10W-30 Mercury Four-Stroke Oil (included with new engine purchases) or a premium quality SAE 10W-30 engine oil,
preferably marine grade when available.


Oil Capacity

2.5hp and 3.5hp

10 fl oz. (300 mL)

4hp, 5hp and 6hp

15 fl oz. (450 mL)

8hp and 9.9hp

27 fl oz. (800 mL)

15hp and 20hp

1 qt. (1000 mL)

NOTE: With four-stroke outboards, oil is added directly to the engine crankcase. Four-stroke outboards use straight gasoline
in the fuel tank (no oil mix). Mercury recommends that engine oil be changed every 100 hours or once yearly, whichever occurs first.
See your owner's manual for detailed information on how to fill and change engine oil.

Shaft Length: How do I measure?

If mounting directly to a boat transom: Measure from the top of the transom down to the bottom of the hull or keel (lowest point).
Measure the area of the transom directly where the engine will be mounted. See diagram below.

If using an auxiliary mounting bracket: With the bracket in the down position, measure from the top of the bracket's mounting surface
down to the bottom of the hull or keel (lowest point where engine will be mounted). Tip: For most auxiliary applications, it is possible to
use a longer shaft length than what is called for, provided there is sufficient clearance when the engine is in the up position. This can be
especially useful in heavy seas.

If measuring an existing outboard: Measure from the inside top of mounting bracket down to anti-cavitation plate above propeller
(this is the largest plate/fin directly above the propeller). See diagram below.

Shaft Length: How do I measure?

Click to Enlarge

Short's Marine is an Authorized Dealer.
We Sell & Service - New & Used Outboard Engines.
Orders are subject to Availability. Engines are For Sale at Short's Marine Dealership,

All Sales Are Final.


Bore x Stroke 2.40 x 2.36in; 61 x 60mm
Cooling Water-cooled with thermostat
Cylinders 2 (in-line)
Displacement 21.4 L / 351 CID
Exhaust Though prop
Fuel (Induction) 2 valves per cylinder, single overhead cam (SOHC)
Fuel System Carbureted
Rated Horsepower 20 HP / 14.7 Kw
RPM 5400-6100
Starting Electric Manual
Dry Weight 115lbs / 52.3kg *Lightest model available
Shaft Length 15 in (381mm); 20 in (508 mm)
Ignition CDI w/electronic spark advance
General Information
Alternator 12 amp / 138 watt (Electric)
Gear Ratio 2.15:1
Gears (Shift) F-N-R
Trim System Manual Power Tilt
Steering Remote Tiller



  • Fingertip Control - Mercury Fourstrokes are designed with a boat load of user-friendly features, such as our multifunction tiller handle. This tiller handle gives you easy one-handed operation of shifting, stopping, throttle, throttle friction, and tilt. More control equals better maneuverability.
  • Large Displacement Design - At 21.4 cubic inches, this engine delivers the strong low-end torque needed to get the hull up on plane, with quicker throttle response and acceleration.
  • Long-Lasting Gearcase - Mercury’s 20hp FourStrokes have dual water pickups. So even if you end up in the shallows, your engine will keep its cool and not overheat.
  • Wishbone Mounts - Mercury’s “wishbone” style motor mount system cradles the powerhead and absorbs the torsional rotation of the crankshaft. By isolating and reducing the vibration transmission to your boat, it provides a smooth driving experience.

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