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A Factual Report From Mercury Marine

Boat House Bulletin Review

Engine:

4.3 MPI ECT Mercury® MerCruiser®

Boat:

Chaparral - 21 H2O Ski & Fish

Prop:

Black Max®

4.3 MPI ECT
Select Units:

Performance Summary

Best Fuel Economy (MPG@RPM) Best Fuel Economy (L/100km@RPM) Best Fuel Economy (L/nm@RPM)
  • 3.8 @ 3000
  • 61.9 @ 3000
  • 0.9 @ 3000
Top Speed (MPH@RPM) Top Speed (KPH@RPM) Top Speed (kts@RPM)
  • 47.1 @ 4580
  • 75.8 @ 4580
  • 40.9 @ 4580
Acceleration 0 - 20 MPH (seconds)
  • 5.35
Acceleration 0 - 30 MPH (seconds)
  • 8.75
RPM Range Speed (MPH / kts) Speed (KPH / kts) Fuel (GPH) Fuel (LPH) Fuel (MPG) Fuel (L/100km)
1000 5.1 / 4.4 8.2 / 4.4 1.4 5.3 3.6 65.3
2000 9.8 / 8.5 15.8 / 8.5 4.2 15.9 2.3 102.3
3000 28.4 / 24.7 45.7 / 24.7 7.5 28.4 3.8 61.9
3500 34.9 / 30.3 56.2 / 30.3 10.1 38.2 3.5 67.2
4000 40.2 / 34.9 64.7 / 34.9 13.2 50.0 3.0 78.4
4500 46.8 / 40.7 75.3 / 40.7 15.5 58.7 3.0 78.4
4580 47.1 / 40.9 75.8 / 40.9 15.6 59.1 3.0 78.4

Performance Curve

GPH MPH MPG
LPH KPH L/100km

Test Conditions

Test Date
  • 2013-08-12
Test Conductor
  • TC/SS
Air Temperature
  • 92 °F
  • 33 °C
Wind Velocity
  • 10 MPH
  • 16 KPH
  • 9 kts
Water Type
  • Salt
Fuel Level at Testing
  • 40 gallons
  • 151 liters
Boat Weight as Tested
  • 3200 lbs
  • 1451 kg

Engine Specifications

Engine
  • 4.3 MPI ECT Mercury® MerCruiser®

Boat Specifications

Manufacturer
  • Chaparral
Website
Boat Model
  • 21 H2O Ski & Fish
Boat Type
  • Ski
Material
  • Fiberglass
Length
  • 21 ft
  • 6.4 m
Beam
  • 8 ft 4 in
  • 2.5 m
Max HP Capacity
  • 260
Fuel Tank Capacity
  • 40.0 gallons
  • 151 liters
Steering Type
  • MerCruiser Power Steering
Dry Boat Weight
  • 3200 pounds
  • 1451.5 kg
Mounting Bolt Hole
  • n/a

Propeller Specifications

Part Number
  • 832832A45
Mercury Name
  • Black Max®
Pitch
  • 21.0
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