The diameter with the pistons was elevated by two millimeters (bore: 88mm) even though the stroke remained uncharged. This tiny change while in the engine architecture enlarged the displacement from 1812cc to 1898cc, that makes the 1.9L HO the most important-displacement PWC engine from the field. I’ve towed it on https://uniqueoutboardsales.com/product-category/boats/pwc-boats/