1990 REVENGE 22 W-T Whaler Drive, E-TEC 225

Optimizing the performance of Boston Whaler boats
jimh
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1990 REVENGE 22 W-T Whaler Drive, E-TEC 225

Postby jimh » Sat Jul 13, 2019 2:23 pm

It has been several years since I gathered any performance data on my 1990 Boston Whaler REVENGE 22 Walk-Through Whaler Drive boat with a 2010 Evinrude E-TEC 225. Below is data from a recent test. The engine is now in its 11th season of use.

Performance Data

BOAT, ENGINE, PROPELLER

Boat: REVENGE 22 Walk-Through Whaler Drive, 1990

Engine: E-TEC 225, Evinrude, 2010-model-year
Recommended WOT RPM Range: 4500 to 5800-RPM
Optimum WOT RPM Range: 5500 to 5700-RPM
Gear ratio: 1.86:1

Propeller: Mercury MIRAGEplus 17-pitch three-blade stainless steel

TEST CONDITIONS

Date: July 12, 2019
Air Temperature: 77-degrees
Wind: 5-knots
Current: none
Humidity: unknown, probably 50- to 70-percent, a nice Summer day
Waves: small with some boat wakes mixed in
Crew: two aboard; total crew weight 360-lbs
Canvas: Flying Top deployed
General gear: normal non-overnight cruising gear.
Fuel: 35-gallons (half-full tank)

TEST RESULTS

Upwind into small waves:

SOG RPM MPG LOAD TRIM NOTES
23.2 3736 2.52 34 35 Not yet optimized for this throttle setting
24.5 3536 2.76 34 36 Optimum fuel economy
27.8 3918 2.66 37 36 Nice cruising speed
29.1 4051 2.66 37 36 Same LOAD as above, but faster speeed
32.9 4456 2.66 41 36 Now 5-MPH faster with same fuel economy
36.5 4921 2.49 46 47 Fast cruising speed
42.6 5605 2.09 100 40 Maximum throttle

Downwind with small waves:

SOG RPM MPG LOAD TRIM NOTES
28.0 3894 2.77 37 35 Optimum fuel economy
28.0 3793 2.81 36 35 Optimum fuel economy
29.2 3949 2.76 37 36 Optimum fuel economy
29.7 3937 2.84 37 25 Optimum fuel econonmy--cherry picking the data
35.7 4690 2.61 44 34 Fast cruising speed with minimum effect on economy
35.8 4708 2.63 44 33 Fast cruising speed with minium effect on economy


Slow speed data
SOG RPM MPG LOAD TRIM NOTES
2.9 503 10.16 0 35 To burn 1-gallon takes 3.5-hours at this speed