Раскрыть скобки The dry sumр method (1)_ (to use) pre-mixed oil in the petrol fuel supply in ratios of from 40:1 to 20:1 as per the manufacturer's recommendation. The fuelloil mix (2) (to induct) through the crankcase so depositing a film of oil on the moving surfaces on its travel to the cylinder. Dry sump engines (3) (to have) the ad tage of lightness and nplicity. The сooling fins on сylinder (4) (to head) castings used by air-cooled motors (5) (to be) not as ideal for slow marine applications, so water-cooling is often (6) (to require) leading to greater complexity in design. Two strokes premix (7) (to be) also prone to oiling of the spark plug gap if start up (8) (to be) not immediate. Асcurate mixing the oil and fuel may not be convenient in a seaway.