Mercury 335 Series specs: 4.00 x 3.50 in (101.6 x 88.9 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 351 ci |
|---|---|
| Cylinders | 8 |
| Bore | 4.000" |
| Stroke | 3.500" |
| Compression | 11.0:1 |
| Advertised power | 145–300 hp |
| Years | 1978 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 351 Cleveland V8 | 351 ci | 4" × 3.5" | 11:1 | 300 |
| 335 351M | 351 ci | 4" × 3.5" | — | 145 |
All are oversquare — bore larger than stroke, which favours revs over low-end torque.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.