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3.5.32 The generator fuel line shall be fitted with a shut-off valve located as close as possible to the generator. 3.6 En�ines/Propulsion: 3.6.1 The propulsion engine configuration shall be twin Cummins marine 6.7L 480 hp to run on B20 diesel fuel. Or appropriate configuration of engine size and water jet for proposed GPM request and speed of 35 knots using 12 volt electrical components, with a direct drive through Hamilton HJ292 water j et propulsion units. 3.6.3 The propulsion engines shall produce the required fully planning boat speed at 90 percent (90%) of the engine manufacturer's horsepower rating, based on ISO 3046 conditions, which allows full power for at least 2 hours out of every 8 hours of operation, and allows at least 1500 operating hours per year. 3.6.4 Alterations to the engines are not acceptable unless approved by the Redwood City Fire Department. 3.6.5 Engine installations shall comply with manufacturer's specifications and requirements, NFPA 302 and the recommendations and standards of the ABYC. 3.6.6 A catch pan shall be installed beneath each engine installed within the hull to catch oil drippings. The catch pan shall be fitted with an accessible drain at the forward and aft ends. 3.6.7 All oil and water filters shall be spin-on, disposable types. 3.6.8 Racor or equal dual cartridge fuel/water separators shall be provided for each engine. All separators shall be made by the same manufacturer and have the same replaceable element. 3.6.9 Filters, dipsticks and maintenance checkpoints shall be on the inboard side of the propulsion engines, if the engine manufacturer offers this option. 3.6.10 All hoses shall be double clamped whenever possible and reasonable. 3.7 Air Intake: 3.7.1 Combustion air for the engines shall be drawn from the machinery space. 3.7.2 Intakes for combustion air for the engines shall be located to minimize chance of water induction. Ducting shall be sized for maximum air velocity of 2000 fps, or less if so required by the engine manufacturer. Fans shall not be used to meet this requirement without the express written consent of the Redwood City Fire Department. 3.7.3 Airflow to the engine compartment shall be arranged to distribute the airflow throughout the compartment. 3.7.4 Combustion air intake vents shall be fitted with removable covers that will prevent carbon dioxide firefighting agent from escaping through the vents. 3.8 Exhaust: 3.8.1 Engine exhaust systems shall be installed in accordance with the engine manufacturer's recommendations and the recommendations of the ABYC. 3.8.2 The exhaust shall be fitted with an anti-siphon loop, and shall be sloped to eliminate standing water. 3.8.3 Engines shall be fitted with silencers or mufflers that are fiberglass. 3.8.4 Exhausts shall exit at the sides of the boat, forward of the transom. 3.9 En�ine Control Equipment: 3.9.1 Dual lever engine controls for each engine shall be installed in accordance with the recommendations and standards of the ABYC. 3.9.2 Each engine shall be equipped with high temperature and low oil pressure alarms. Each reverse/reduction gear shall be provided with high temperature and low oil pressure alarms and gauges. The alarms and gauges shall sound at the steering station. Alarms shall be provided with a test feature and have ability to be silenced. 12