Wisconsin

Wisconsin Robin Engines

Listed below are the various models of the Wisconsin Robin Engines and some data regarding them.

Model WI-145 WI-145V EY18-3M WI-185 EY25W
Cyl. 1 12.48
631.81
46		 12.56
652.16
55		 12.64
672.16
55		 12.83
722.44
62
Bore (in./mm) 2.48/63 8.73/143 11.14/182 11.14/182 15.40/252
Stroke (in./mm) 1.81/46 1.6/1.2 2.0/1.5 2.3/1.7 3.0/2.2
Displacement 8.73/143 1.8/1.3 2.3/1.7 2.5/19 3.4/2.5
RPM Rated Horsepower/KW Output
1800 1.5/1.1 2.0/1.5 2.6/2.8 2.9/2.2 3.8/2.8
2000 1.7/1.3 2.3/1.7 2.9/2.2 3.2/2.4 4.2/3.1
2200 1.9/1.4 2.5/1.9 3.2/2.4 3.5/2.6 4.6/3.4
2400 2.2/1.6 2.7/2.0 3.5/2.6 3.8/2.8 5.0/3.7
2600 2.4/1.8 2.0/2.2 3.8/2.8 4.0/3.0 5.4/4.0
2800 2.6/1.9 3.1/2.3 4.1/3.1 4.2/3.1 5.8/4.3
3000 2.8/2.1 3.3/2.5 4.4/3.3 4.4/3.3 6.1/4.6
3200 3.0/2.2 3.5/2.8 4.6/3.4 4.6/3.4 6.5/4.8
3400 3.2/2.4 — — — —
3600 3.4/2.5 — — — —
3800 3.45/2.6 — — — —
4000 3.5/2.6 — — — —
Max. Torque
(in ft. lbs) & RPM		 59.5@3600 62.0@3200 80.6@3200 82.4@3200 114@3200

Model EY27W WI-340 EY44W WI-390 EY21W
Cyl. 12.91
742.44
62		 13.07
782.76
70		 13.54
902.68
68		 13.07
842.76
70		 12.95
752.76
70
Bore (in./mm) 16.26/266 20.4/344 26.4/433 23.7/388 37.74/618
Stroke (in./mm) 3.5/2.6 43/32 6.0/4.5 5.1/3.8 8.2/6.1
Displacement 4.0/3.0 5.0/3.7 6.8/5.1 6.0/4.5 9.5/7.1
RPM Rated Horsepower/KW Output
1800 4.4/3.3 5.6/4.2 7.5/5.6 6.8/5.1 10.3/7.7
2000 4.9/3.7 6.2/4.8 8.1/6.0 7.5/5.6 11.6/8.7
2200 5.4/4.0 6.8/5.1 8.6/6.4 8.3/8.2 12.3/9.2
2400 5.9/4.4 7.4/5.5 9.2/6.9 9.0/6.7 13.5/10.1
2600 6.3/4.7 7.9/5.9 9.7/7.2 9.6/7.2 14.1/10.5
2800 6.8/5.1 8.3/6.2 1O.07/7.5 10.2/7.8 15.1/11.3
3000 7.2/54 8.7/65 10.2/7.6 10.6/7.9 11.7/11.7
3200 7.5/5.6 9.0/6.7 10.5/7.8 11.0/8.2 16.2/12.1
3400 — — — — 16.8/12.5
3600 — — — — —
3800 — — — — —
4000 — — — — —
Max. Torque
(in ft. lbs) & RPM		 134@3200 167@2800 214@2000 203@2800 298@2600 
            Spark Plug Data
                   Champion Plug Number:  CH. 7
                   AC Plug Number: AC-G-8

(Source: Some of the data are from “Wisconsin Service Manual”)

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