Industry-leading canister fuel filters for outboard and inboard engines High-performance fuel-injected engines require the ultimate fuel filtration, water separation, and maximum fuel flow. Sierra's new filter elements deliver all three of these critical performance factors. 7900-Series 10-micron filters eliminate harmful contaminants at over 90% efficiency, while removing over 99% of emulsified water. They're engineered for today s sterndrives and inboards, along with 2-cycle and 4-cycle outboards. Ethanol-blended fuels increase the chances of water in fuel tanks, resulting in premature wear, poor performance, and component damage. Contaminants of over 10-micron size also can cause severe damage with the close tolerances of modern fuel pumps and injectors. That is why a high-efficiency water-separating filter is so important. Sierra 10-micron filters were independently tested to JIS, SAE J1839/J905, and ISO 4548-12 standards.