Honda Small Engine Technical Specifications

The engine serial number is stamped into the side of the engine. All Honda engine serial numbers have a 4 or 5 letter prefix followed by a 7 digit number.

Engine Model Displacement Bore & Stroke Power output (max.) Net Torque
G SERIES
G20 135 cc
(8.05 cu.in.)
3.0 PS
G25 59 cc
(3.6 cu.in.)
46 x 35.6 mm
(1.81 x 1.40 in.)
2.5 HP at 6,000 rpm
G28 67 cc
(4.09 cu.in.)
49 x 35.5 mm
(1.93 x 1.40 in.)
2.8 HP at 6,000 rpm
G30 135 cc
(8.05 cu.in.)
4.0 PS
G35 144 cc
(8.79 cu.in.)
64 x 45 mm
(2.52 x 1.77 in.)
3.5 HP at 4,000 rpm 6.5 Nm at 3,000 rpm
G41 170 cc
(10.37 cu.in.)
66 x 50 mm
(2.59 x 1.97 in.)
4.5 PS at 4,000 rpm
G42 171 cc
(10.4 cu.in.)
66 x 50 mm
(2.59 x 1.97 in.)
4.5 HP at 4,000 rpm 8.4 Nm at 3,600 rpm
G45 240 cc
(16.6 cu.in.)
72 x 59 mm
(2.83 x 3.32 in.)
6.0 PS at 4,000 rpm
G50 187 cc
(11.4 cu.in.)
69 x 50 mm
(2.7 x 2.0 in.)
5.0 HP at 4,000 rpm 9.0 Nm at 3,600 rpm
G65 240 cc
(14.6 cu.in.)
72 x 59 mm
(2.8 x 2.3 in.)
6.9 HP at 4,000 rpm 12.0 Nm at 3,600 rpm
G80 296 cc
(18.0 cu.in.)
80 x 59 mm
(3.2 x 2.3 in.)
8.0 HP at 4,000 rpm 15.7 Nm at 2,500 rpm
G100 76 cc
(4.6 cu.in.)
46 x 46 mm
(1.81 x 1.81 in.)
2.0 HP at 4,200 rpm 3.5 Nm at 3,000 rpm
G100 K1 83 cc
(5.06 cu.in.)
48 x 46 mm
(1.88 x 1.81 in.)
2.2 HP at 4,200 rpm 3.8 Nm at 3,000 rpm
G100 K2 98 cc
(6.0 cu.in.)
52 x 46 mm
(2.05 x 1.81 in.)
2.5 HP at 4,200 rpm 4.5 Nm at 3,000 rpm
G150 144 cc
(8.8 cu.in.)
64 x 45 mm
(2.52 x 1.77 in.)
3.8 HP at 3,600 rpm 7.4 Nm at 3,000 rpm
G200 197 cc
(12.0 cu.in.)
64 x 56 mm
(2.52 x 2.20 in.)
5.5 HP at 3,600 rpm 10.8 Nm at 2,500 rpm
G300 272 cc
(16.1 cu.in.)
76 x 60 mm
(3.00 x 2.40 in.)
7 HP at 3,600 rpm 14.7 Nm at 3600 rpm
G400 406 cc
(24.8 cu.in.)
86 x 70 mm
(3.40 x 2.80 in.)
10 HP at 3,600 rpm 22.5 Nm at 3600 rpm
GC SERIES
GC135 135 cc
(8.2 cu.in.)
64 x 42 mm
(2.5 x 1.7 in.)
4.0 HP at 3,600 rpm 8.6 Nm at 2,500 rpm
GC160 160 cc
(9.8 cu.in.)
64 x 50 mm
(2.5 x 1.97 in.)
5.0 HP at 3,600 rpm 10.3 Nm at 2,500 rpm
GC190 187 cc
(11.4 cu.in.)
69 x 50 mm
(2.71 x 1.97 in.)
6.0 HP at 3,600 rpm 12.1 Nm at 2,500 rpm
GCV SERIES
GCV135 135 cc
(8.2 cu.in.)
64 x 42 mm
(2.5 x 1.7 in.)
4.5 HP at 3,600 rpm 9.7 Nm at 2,500 rpm
GCV160 160 cc
(9.8 cu.in.)
64 x 50 mm
(2.5 x 1.97 in.)
5.5 HP at 3,600 rpm 11.4 Nm at 2,500 rpm
GCV190 187 cc
(11.4 cu.in.)
69 x 50 mm
(2.71 x 1.97 in.)
5.1 HP at 3,600 rpm 11.3 Nm at 2,500 rpm
GCV520 530 cc
(32.3 cu.in.)
77 x 57 mm
(3.0 x 2.2 in.)
14.0 HP at 3,600 rpm 35.9 Nm at 2,500 rpm
GCV530 530 cc
(32.3 cu.in.)
77 x 57 mm
(3.0 x 2.2 in.)
16.0 HP at 3,600 rpm 36.5 Nm at 2,500 rpm
GD SERIES
GD90 9.0 PS
GD100 10.0 PS
GD320 317 cc
(19.3 cu.in.)
76 x 70 mm
(2.99 x 2.76 in.)
7.0 HP at 3,600 rpm 15.7 Nm at 3,600 rpm
GD321 317 cc
(19.3 cu.in.)
76 x 70 mm
(2.99 x 2.76 in.)
7.0 HP at 3,600 rpm 15.7 Nm at 3,600 rpm
GD410 411 cc
(25.2 cu.in.)
82 x 78 mm
(3.23 x 3.07 in.)
9.0 HP at 3,600 rpm 20.6 Nm at 3,600 rpm
GD411 411 cc
(25.2 cu.in.)
82 x 78 mm
(3.23 x 3.07 in.)
9.0 HP at 3,600 rpm 20.6 Nm at 3,600 rpm
GD1100 1061 cc
(65.0 cu.in.)
76 x 78 mm
(2.99 x 3.07 in.)
SH1:18 HP at 2,600 rpm
SH2:20 HP at 3,000 rpm
SH3:22 HP at 3,600 rpm
SH1:58.8 Nm at 2,600 rpm
SH2:55.9 Nm at 2,000 rpm
SH3:52 Nm at 2,200 rpm
GD1250 1235 cc
(75.6 cu.in.)
82 x 78 mm
(3.23 x 3.07 in.)
SH1:20 HP at 2,600 rpm
SH2:22 HP at 3,000 rpm
SH3:24 HP at 3,600 rpm
SH1:64.7 Nm at 1,600 rpm
SH2:61.8 Nm at 2,000 rpm
SH3:55.9 Nm at 2,200 rpm
GE SERIES
GE35 34.4 cc
(2.11 cu.in.)
37 x 32 mm
(1.5 x 1.3 in.)
0.91 HP at 4,500 rpm 1.47 Nm at 3,500 rpm
GP SERIES
GP160H 163 cc
(9.9 cu.in.)
68 x 45 mm
(2.68 x 1.77 in.)
4.8 HP at 3,600 rpm 10.3 Nm at 2,500 rpm
GP200H 196 cc
(12.0 cu.in.)
68 x 54 mm
(2.68 x 2.13 in.)
5.5 HP at 3,600 rpm 12.4 Nm at 2,500 rpm
GS SERIES
GS65 240 cc
(14.6 cu.in.)
72 X 59 mm
(2.8 x 2.3 in)
6.8 PS at 4,000 rpm 12.0 Nm at 3,000 rpm
GS160 160 cc
(9.8 cu.in.)
64 x 50 mm
(2.5 x 2.0 in.)
5.0 HP at 3,600 rpm 10.3 Nm at 2,500 rpm
GS190A 187 cc
(11.4 cu.in.)
69 x 50 mm
(2.7 x 2.0 in.)
6.0 HP at 3,600 rpm 12.1 Nm at 2,500 rpm
GS190 187 cc
(11.4 cu.in.)
69 x 50 mm
(2.7 x 2.0 in.)
5.2 HP at 3,600 rpm 11.3 Nm at 2,500 rpm
GSV SERIES
GSV190 187 cc
(11.4 cu.in.)
69 x 50 mm
(2.7 x 2.0 in.)
6.5 HP at 3,600 rpm 13.2 Nm at 2,500 rpm
GT SERIES
GT50 4.0 PS
GT65 5.0 PS
GV SERIES
GV35 144 cc
(8.8 cu.in.)
64 x 45 mm
(2.5 x 1.8 in.)
3.5 HP at 4,000 rpm 6.6 Nm at 3,000 rpm
GV100 97 cc
(5.9 cu.in.)
52 x 46 mm
(2.04 x 1.81 in.)
2.6 HP at 4,200 rpm 4.3 Nm at 3,000 rpm
GV150 144 cc
(8.8 cu.in.)
64 x 45 mm
(2.5 x 1.8 in.)
3.5 HP at 3,600 rpm 6.9 Nm at 3,000 rpm
GV200 197 cc
(12.0 cu.in.)
67 x 56 mm
(2.64 x 2.20 in.)
5.0 HP at 3,600 rpm 10.3 Nm at 3,000 rpm
GV400 406 cc
(28.1 cu.in.)
86 x 70 mm
(3.40 x 2.80 in.)
11.0 HP at 3,600 rpm 24.5 Nm at 3,000 rpm
GX SERIES
GX22 22 cc
(1.3 cu.in.)
33 x 26 mm
(1.3 x 1.0 in.)
1.0 HP at 7,000 rpm 1.09 Nm at 4,500 rpm
GX25 25 cc
(1.5 cu.in.)
35 x 26 mm
(1.4 x 1.0 in.)
1.08 HP at 7,000 rpm 1.25 Nm at 5,000 rpm
GX31 31 cc
(1.3 cu.in.)
39 x 26 mm
(1.5 x 1.0 in.)
1.5 HP at 7,000 rpm 1.64 Nm at 4,500 rpm
GX35 35.8 cc
(2.18 cu.in.)
39 x 30 mm
(1.5 x 1.2 in.)
1.6 PS at 7,000 rpm 1.9 Nm at 5,500 rpm
GX100 98 cc
(6.0 cu.in.)
56 x 40 mm
(2.2 x 1.6 in.)
3.0 PS at 3,600 rpm 5.7 Nm at 3,600 rpm
GX110 107 cc
(6.5 cu.in.)
57 x 42 mm
(2.24 x 1.6 in.)
3.5 PS at 4,000 rpm 6.7 Nm at 3,600 rpm
GX120 T1 118 cc
(7.2 cu.in.)
60 x 42 mm
(2.4 x 1.65 in.)
4.0 HP at 4,000 rpm 7.5 Nm at 2,500 rpm
GX120 UT2/T2 118 cc
(7.2 cu.in.)
60 x 42 mm
(2.4 x 1.65 in.)
3.5 HP at 3,600 rpm 7.3 Nm at 2,500 rpm
GX140 144 cc
(8.78 cu.in.)
64 x 45 mm
(2.5 x 1.77 in.)
5.0 PS at 4,000 rpm 9.8 Nm at 3,600 rpm
GX160 T1 163 cc
(9.9 cu.in.)
68 x 45 mm
(2.68 x 1.77 in.)
5.5 HP at 4,000 rpm 11 Nm at 2,500 rpm
GX160 UT2/T2 163 cc
(9.9 cu.in.)
68 x 45 mm
(2.68 x 1.77 in.)
4.9 HP at 3,600 rpm 10.3 Nm at 2,500 rpm
GX200 T 196 cc
(12.0 cu.in.)
68 x 54 mm
(2.68 x 2.13 in.)
6.5 HP at 3,600 rpm 13.2 Nm at 2,500 rpm
GX200 UT2/T2 196 cc
(12.0 cu.in.)
68 x 54 mm
(2.68 x 2.13 in.)
5.6 HP at 3,600 rpm 12.4 Nm at 2,500 rpm
GX240 K1/T1/UT1 242 cc
(14.8 cu.in.)
73 x 58 mm
(2.9 x 2.3 in.)
8.0 HP at 3,600 rpm 17.0 Nm at 2,500 rpm
GX240 R2/RT2/T2/U2/UT2 270 cc
(16.5 cu.in.)
77 x 58 mm
(3.0 x 2.3 in.)
7.9 HP at 3,600 rpm 18.3 Nm at 2,500 rpm
GX270 K1/T1/UT1 270 cc
(16.5 cu.in.)
77 x 58 mm
(3.0 x 2.3 in.)
9.0 HP at 3,600 rpm 19.5 Nm at 2,500 rpm
GX270 T2/UT2 270 cc
(16.5 cu.in.)
77 x 58 mm
(3.0 x 2.3 in.)
8.4 HP at 3,600 rpm 19.1 Nm at 2,500 rpm
GX340 K1 337 cc
(20.6 cu.in.)
82 x 64 mm
(3.2 x 2.5 in.)
11.0 HP at 3,600 rpm 24 Nm at 2,500 rpm
GX340 R2/RT2/T2/U2/UT2 389 cc
(23.7 cu.in.)
88 x 64 mm
(3.5 x 2.5 in.)
10.7 HP at 3,600 rpm 26.4 Nm at 2,500 rpm
GX360 K1 359 cc
(21.9 cu.in.)
58 x 68 mm
(2.3 x 2.7 in.)
13.0 HP at 3,600 rpm 25.7 Nm at 3,000 rpm
GX390 K1 389 cc
(23.7 cu.in.)
88 x 64 mm
(3.5 x 2.5 in.)
13.0 HP at 3,600 rpm 27 Nm at 2,500 rpm
GX390 RT2/T2/UT2 389 cc
(23.7 cu.in.)
88 x 64 mm
(3.5 x 2.5 in.)
11.7 HP at 3,600 rpm 26.5 Nm at 2,500 rpm
GX610 K1 614 cc
(37.5 cu.in.)
77 x 66 mm
(3.03 x 2.6 in.)
18 HP at 3,600 rpm 43.1 Nm at 2,500 rpm
GX610 U1/R1 614 cc
(37.5 cu.in.)
77 x 66 mm
(3.03 x 2.6 in.)
16.6 HP at 3,600 rpm 39.6 Nm at 2,500 rpm
GX620 K1 614 cc
(37.5 cu.in.)
77 x 66 mm
(3.03 x 2.6 in.)
20 HP at 3,600 rpm 44.1 Nm at 2,500 rpm
GX620 U1/R1 614 cc
(37.5 cu.in.)
77 x 66 mm
(3.03 x 2.6 in.)
18.1 HP at 3,600 rpm 40.6 Nm at 2,500 rpm
GX630 688 cc
(41.97 cu.in.)
78 x 72 mm
(3.07 x 2.83 in.)
20.8 HP at 3,600 rpm 48.3 Nm at 2,500 rpm
GX640 635 cc
(38.7 cu.in.)
76 x 70 mm
(3.0 x 2.8 in.)
19.7 HP at 3,600 rpm 46.1 Nm at 2,500 rpm
GX660 688 cc
(41.97 cu.in.)
78 x 72 mm
(3.07 x 2.83 in.)
21.5 HP at 3,600 rpm 48.3 Nm at 2,500 rpm
GX670 670 cc
(40.9 cu.in.)
77 x 72 mm
(3.03 x 2.83 in.)
24.0 HP at 3,600 rpm 50.8 Nm at 2,500 rpm
GX670 U/R 670 cc
(40.9 cu.in.)
77 x 72 mm
(3.03 x 2.83 in.)
20.5 HP at 3,600 rpm 46.0 Nm at 2,500 rpm
GX690 688 cc
(41.97 cu.in.)
78 x 72 mm
(3.07 x 2.83 in.)
22.1 HP at 3,600 rpm 48.3 Nm at 2,500 rpm
GXH SERIES
GXH50 49 cc
(2.99 cu.in.)
42 x 36 mm
(1.65 x 1.42 in.)
2.4 HP at 7,000 rpm 3.04 Nm at 4,500 rpm
GXR SERIES
GXR120 T/RT 121 cc
(7.4 cu.in.)
60 x 43 mm
(2.36 x 1.69 in.)
3.6 HP at 3,600 rpm 7.5 Nm at 2,500 rpm
GXV SERIES
GXV50 49 cc
(2.99 cu.in.)
42 x 36 mm
(1.65 x 1.42 in.)
2.5 HP at 7,000 rpm 3.04 Nm at 2,500 rpm
GXV57 57 cc
(3.50 cu.in.)
45 x 36 mm
(1.77 x 1.42 in.)
2.0 HP at 4,800 rpm 3.2 Nm at 4,500 rpm
GXV120 118 cc
(7.2 cu.in.)
60 x 42 mm
(2.4 x 1.7 in.)
4.0 HP at 3,600 rpm 8.0 Nm at 2,700 rpm
GXV140 135 cc
(8.2 cu.in.)
68 x 45 mm
(2.7 x 1.8 in.)
5.0 HP at 3,600 rpm 10.3 Nm at 2,700 rpm
GXV160 163 cc
(10.0 cu.in.)
68 x 45 mm
(2.7 x 1.8 in.)
5.5 HP at 3,600 rpm 10.8 Nm at 2,500 rpm
GXV270 270 cc
(16.5 cu.in.)
77 x 58 mm
(3.0 x 2.3 in.)
8.5 HP at 3,600 rpm 18 Nm at 2,500 rpm
GXV340 337 cc
(20.6 cu.in.)
82 x 64 mm
(3.23 x 2.52 in.)
11 HP at 3,600 rpm 23 Nm at 2,500 rpm
GXV390 389 cc
(23.7 cu.in.)
88 x 64 mm
(3.46 x 2.52 in.)
13 HP at 3,600 rpm 28 Nm at 2,500 rpm
GXV520 530 cc
(32.3 cu.in.)
77 x 57 mm
(3.0 x 2.2 in.)
14.0 HP at 3,600 rpm 35.9 Nm at 2,500 rpm
GXV530 530 cc
(32.3 cu.in.)
77 x 57 mm
(3.0 x 2.2 in.)
16.0 HP at 3,600 rpm 36.5 Nm at 2,500 rpm
GXV610 K1 514 cc
(37.5 cu.in.)
77 x 66 mm
(3.0 x 2.6 in.)
18.0 HP at 3,600 rpm 43.1 Nm at 2,500 rpm
GXV620 K1 514 cc
(37.5 cu.in.)
77 x 66 mm
(3.0 x 2.6 in.)
20.0 HP at 3,600 rpm 44.1 Nm at 2,500 rpm
GXV630 R 688 cc
(41.97 cu.in.)
78 x 72 mm
(3.07 x 2.83 in.)
20.8 HP at 3,600 rpm 48.3 Nm at 2,500 rpm
GXV660 R 688 cc
(41.97 cu.in.)
78 x 72 mm
(3.07 x 2.83 in.)
21.5 HP at 3,600 rpm 48.3 Nm at 2,500 rpm
GXV670 670 cc
(40.9 cu.in.)
77 x 72 mm
(3.03 x 2.83 in.)
22.8 HP at 3,600 rpm 44.4 Nm at 2,500 rpm
GXV690 R 688 cc
(41.97 cu.in.)
78 x 72 mm
(3.07 x 2.83 in.)
22.1 HP at 3,600 rpm 48.3 Nm at 2,500 rpm
iGX SERIES
iGX240 270 cc
(16.5 cu.in.)
77 x 58 mm
(3.0 x 2.3 in.)
7.9 HP at 3,600 rpm 18.3 Nm at 3,600 rpm
iGX270 270 cc
(16.5 cu.in.)
77 x 58 mm
(3.0 x 2.3 in.)
8.4 HP at 3,600 rpm 19.1 Nm at 3,600 rpm
iGX340 289 cc
(23.7 cu.in.)
88 x 64 mm
(3.46 x 2.52 in.)
10.7 HP at 3,600 rpm 26.4 Nm at 3,600 rpm
iGX390 289 cc
(23.7 cu.in.)
88 x 64 mm
(3.46 x 2.52 in.)
11.7 HP at 3,600 rpm 26.5 Nm at 3,600 rpm
iGX440 438 cc
(26.7 cu.in.)
88 x 72.1 mm
(3.46 x 2.84 in.)
12.7 HP at 3,600 rpm 29.8 Nm at 2,500 rpm