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Johnson

Johnson Outboards was a cornerstone of American recreational boating for nearly a century, known for the iconic 'Sea-Horse' brand.

Founded by the Johnson brothers in the early 1900s, the company was eventually merged into the Outboard Marine Corporation (OMC). Johnson engines were distinctive for their rugged simplicity and ease of maintenance, making them the most common sight on American lakes for decades. Their classic crossflow and later 'looper' 2-stroke designs were celebrated for their durability and consistent starting. While the brand transitioned to 4-stroke power through a partnership with Suzuki in the early 2000s, it is the vintage 2-stroke models that remain a favorite for DIY mechanics and restoration enthusiasts. Although production under the Johnson name ceased in 2007, their massive global footprint ensures that parts and technical support remain widely available for these legendary workhorses.

Technical Authority Verified manufacturer specifications and historical performance data for the Johnson fleet.
Model Year HP Stroke Service Data Cyl. Displ. Fuel System Weight Gear Ratio Status
2hp Mate (2-Stroke) 1976 2 2-stroke ✓ Verified 1 cyl 43 cc Carbureted 11 kg 1.85 Discontinued
2hp (2-Stroke) 1985 2 2-stroke ✓ Verified 1 cyl 27 cc Carbureted 11 kg 1.00:1 Discontinued
2hp (4-Stroke) 2005 2 4-stroke ✓ Verified 1 cyl 68 cc Carbureted 12 kg 1.85 Discontinued
3.5hp (4-Stroke) 2005 3.5 4-stroke ✓ Verified 1 cyl 85 cc Carbureted 18 kg 1.85 Discontinued
4hp Twin (2-Stroke) 1976 4 2-stroke ✓ Verified 2 cyl 87 cc Carbureted 15 kg 1.65 Discontinued
4hp (4-Stroke) 2005 4 4-stroke ✓ Verified 1 cyl 138 cc Carbureted 25 kg 1.65 Discontinued
4hp (2-Stroke) 1985 4 2-stroke ✓ Verified 2 cyl 87 cc Carbureted 16 kg 1.00:1 Discontinued
5hp (4-Stroke) 2005 5 4-stroke ✓ Verified 1 cyl 138 cc Carbureted 25 kg 1.92 Discontinued
6hp Fisherman (2-Stroke) 1976 6 2-stroke ✓ Verified 2 cyl 145 cc Carbureted 23 kg 2.23 Discontinued
6hp (2-Stroke) 1995 6 2-stroke ✓ Verified 2 cyl 164 cc Carbureted 26 kg 2.23:1 Discontinued
6hp (2-Stroke) 1985 6 2-stroke ✓ Verified 2 cyl 164 cc Carbureted 26 kg 2.23:1 Discontinued
6hp (4-Stroke) 2005 6 4-stroke ✓ Verified 1 cyl 138 cc Carbureted 25 kg 2.23 Discontinued
8hp (4-Stroke) 2005 8 4-stroke ✓ Verified 2 cyl 208 cc Carbureted 37 kg 2.23 Discontinued
8hp (2-Stroke) 1985 8 2-stroke ✓ Verified 2 cyl 164 cc Carbureted 26 kg 2.23:1 Discontinued
9.9hp (4-Stroke) 2005 9.9 4-stroke ✓ Verified 2 cyl 302 cc Carbureted 44 kg 2.42 Discontinued
9.9hp (2-Stroke) 1995 9.9 2-stroke ✓ Verified 2 cyl 216 cc Carbureted 34 kg 2.42:1 Discontinued
9.9hp Workhorse (2-Stroke) 1976 9.9 2-stroke ✓ Verified 2 cyl 216 cc Carbureted 33 kg 2.42 Discontinued
15hp Speedster (2-Stroke) 1976 15 2-stroke ✓ Verified 2 cyl 216 cc Carbureted 33 kg 2.42 Discontinued
15hp (2-Stroke) 1995 15 2-stroke ✓ Verified 2 cyl 216 cc Carbureted 34 kg 2.42:1 Discontinued
15hp (4-Stroke) 2005 15 4-stroke ✓ Verified 2 cyl 302 cc Carbureted 44 kg 2.42 Discontinued
20hp (2-Stroke) 1978 20 2-stroke ✓ Verified 2 cyl 360 cc Carbureted 38 kg 2.15 Discontinued
25hp (2-Stroke) 1978 25 2-stroke ✓ Verified 2 cyl 360 cc Carbureted 40 kg 2.15 Discontinued
25hp (2-Stroke) 1995 25 2-stroke ✓ Verified 2 cyl 521 cc Carbureted 48 kg 1.75:1 Discontinued
30hp (2-Stroke) 1995 30 2-stroke ✓ Verified 2 cyl 521 cc Carbureted 52 kg 1.75:1 Discontinued
35hp (2-Stroke) 1978 35 2-stroke ✓ Verified 2 cyl 521 cc Carbureted 53 kg 2.15 Discontinued
35hp (3-Cyl 2-Stroke) 1998 35 2-stroke ✓ Verified 3 cyl 521 cc Carbureted 54 kg 1.75:1 Discontinued
40hp (2-Stroke) 1978 40 2-stroke ✓ Verified 2 cyl 737 cc Carbureted 64 kg 2.42 Discontinued
40hp Commercial 1996 40 2-stroke ✓ Verified 2 cyl 737 cc Carbureted 84 kg 2.42:1 Discontinued
40hp (4-Stroke) 2004 40 4-stroke ✓ Verified 3 cyl 815 cc EFI 109 kg 2.27:1 Discontinued
50hp (2-Stroke) 1978 50 2-stroke ✓ Verified 2 cyl 737 cc Carbureted 84 kg 2.42 Discontinued
50hp Looper (3-Cyl) 1996 50 2-stroke ✓ Verified 3 cyl 913 cc Triple Carbureted 104 kg 2.42:1 Discontinued
50hp (4-Stroke) 2004 50 4-stroke ✓ Verified 3 cyl 815 cc EFI 109 kg 2.27:1 Discontinued
55hp (2-Stroke) 1978 55 2-stroke ✓ Verified 2 cyl 737 cc Carbureted 85 kg 2.42 Discontinued
60hp (2-Stroke) 1978 60 2-stroke ✓ Verified 3 cyl 814 cc Carbureted 95 kg 2.42 Discontinued
70hp (4-Stroke) 2004 70 4-stroke ✓ Verified 4 cyl 1298 cc EFI 163 kg 2.42:1 Discontinued
70hp (2-Stroke) 1978 70 2-stroke ✓ Verified 3 cyl 814 cc Carbureted 97 kg 2.42 Discontinued
70hp Looper (3-Cyl) 1996 70 2-stroke ✓ Verified 3 cyl 913 cc Triple Carbureted 115 kg 2.42:1 Discontinued
75hp (2-Stroke) 1978 75 2-stroke ✓ Verified 3 cyl 814 cc Carbureted 102 kg 2.42 Discontinued
85hp Crossflow V4 1984 85 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
85hp Crossflow V4 1978 85 2-stroke ✓ Verified 4 cyl 1500 cc Twin Carbureted 138 kg 2.0 Discontinued
88hp Crossflow V4 1984 88 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
90hp Crossflow V4 1984 90 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
90hp (4-Stroke) 2004 90 4-stroke ✓ Verified 4 cyl 1950 cc EFI 189 kg 2.59:1 Discontinued
90hp V4 (2-Stroke) 1995 90 2-stroke ✓ Verified 4 cyl 1632 cc Carbureted 140 kg 2.00:1 Discontinued
90hp Looper V4 1995 90 2-stroke ✓ Verified 4 cyl 1700 cc Carbureted 143 kg 2.0 Discontinued
100hp Crossflow V4 1984 100 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
110hp Crossflow V4 1984 110 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
115hp Crossflow V4 1984 115 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
115hp Crossflow V4 1978 115 2-stroke ✓ Verified 4 cyl 1500 cc Twin Carbureted 138 kg 2.0 Discontinued
115hp (4-Stroke) 2004 115 4-stroke ✓ Verified 4 cyl 1950 cc EFI 189 kg 2.59:1 Discontinued
115hp Looper V4 1995 115 2-stroke ✓ Verified 4 cyl 1700 cc Carbureted 143 kg 2.0 Discontinued
115hp FastStrike 1996 115 2-stroke ✓ Verified 4 cyl 1726 cc Carbureted 145 kg 2.00:1 Discontinued
120hp Looper V4 1995 120 2-stroke ✓ Verified 4 cyl 2000 cc Carbureted 168 kg 2.25 Discontinued
135hp Crossflow V4 1978 135 2-stroke ✓ Verified 4 cyl 1600 cc Twin Carbureted 142 kg 1.86 Discontinued
140hp (4-Stroke) 2004 140 4-stroke ✓ Verified 4 cyl 2044 cc EFI 189 kg 2.59:1 Discontinued
140hp Looper V4 1995 140 2-stroke ✓ Verified 4 cyl 2000 cc Carbureted 168 kg 2.25 Discontinued
140hp Crossflow V4 1978 140 2-stroke ✓ Verified 4 cyl 1600 cc Twin Carbureted 142 kg 2.0 Discontinued
140hp Crossflow V4 1984 140 2-stroke ✓ Verified 4 cyl 1632 cc Twin Carbureted 138 kg 2.00:1 Discontinued
150hp Looper V6 1995 150 2-stroke ✓ Verified 6 cyl 2600 cc Carbureted 175 kg 1.86 Discontinued
150hp Crossflow V6 1978 150 2-stroke ✓ Verified 6 cyl 2400 cc Triple Carbureted 172 kg 1.86 Discontinued
150hp Crossflow V6 1984 150 2-stroke ✓ Verified 6 cyl 2448 cc Triple Carbureted 175 kg 1.86:1 Discontinued
Ocean Pro 150 1996 150 2-stroke ✓ Verified 6 cyl 2589 cc Carbureted 172 kg 1.87:1 Discontinued
150hp V6 (2-Stroke) 1996 150 2-stroke ✓ Verified 6 cyl 2589 cc Carbureted 172 kg 1.86:1 Discontinued
175hp Crossflow V6 1984 175 2-stroke ✓ Verified 6 cyl 2448 cc Triple Carbureted 175 kg 1.86:1 Discontinued
175hp Crossflow V6 1978 175 2-stroke ✓ Verified 6 cyl 2400 cc Triple Carbureted 175 kg 1.86 Discontinued
175hp Looper V6 1995 175 2-stroke ✓ Verified 6 cyl 2600 cc Carbureted 175 kg 1.86 Discontinued
185hp Crossflow V6 1984 185 2-stroke ✓ Verified 6 cyl 2448 cc Triple Carbureted 175 kg 1.86:1 Discontinued
200hp Looper V6 1995 200 2-stroke ✓ Verified 6 cyl 3000 cc Carbureted 204 kg 1.86 Discontinued
200hp Crossflow V6 1984 200 2-stroke ✓ Verified 6 cyl 2448 cc Triple Carbureted 175 kg 1.86:1 Discontinued
200hp Crossflow V6 1978 200 2-stroke ✓ Verified 6 cyl 2400 cc Triple Carbureted 180 kg 1.86 Discontinued
225hp Looper V6 1995 225 2-stroke ✓ Verified 6 cyl 3000 cc Carbureted 204 kg 1.86 Discontinued
235hp Crossflow V6 1978 235 2-stroke ✓ Verified 6 cyl 2600 cc Triple Carbureted 185 kg 1.86 Discontinued
235hp Crossflow V6 1984 235 2-stroke ✓ Verified 6 cyl 4145 cc Triple Carbureted 180 kg 1.86:1 Discontinued
250hp V8 Looper 1995 250 2-stroke ✓ Verified 8 cyl 3600 cc Carbureted 250 kg 1.85 Discontinued
300hp V8 Looper 1995 300 2-stroke ✓ Verified 8 cyl 4000 cc Carbureted 260 kg 1.86 Discontinued