6. MAINTENANCE__PAGE 42NOTE1. Refer to the individual manufacturer’s manuals, which can be found in the Owner’s Manualpacket, for care and maintenance of equipment and components. In some cases, failure todo so could void the warranty.2. If chemicals are used during maintenance, be careful to follow environmental regulationsand good practices, in particular if they risk being released to water.6.1 FUEL SYSTEMLengthy periods of storage and/or non-use, common to boats, create unique problems.When preparing to store a boat for extended periods, of two months or more, it is bestto completely remove all fuel from the tank. The fuel remove plug is installed on the fueltank inspection hatch. You can use this hole for introducing a hose from any portablebilge pump used to remove the fuel. If it is not possible to remove the fuel, maintaining afull tank of fuel is recommended to prevent condensation of humid air.If water enters the fuel system, it must be completely drained and refueled with freshfuel. Water may be detected by inspecting the fuel water separator filter (optional) or bysigns of uneven engine operation / jumpy rpm / starting problems.At least once in a year, carefully inspect all fuel and ventilation lines and hoses. Check forsigns of leaks along them and carefully check the connections at each end. See alsochapter 4.1.6.2 HULL, DECK, RAILS & SUPERSTRUCTURESFresh water, saltwater and water temperature can all affect the types of growth that youwill find on your boat’s surfaces. Any growth will affect the boat’s performance andoverall look. Keep the surfaces clean using water and a soft sponge /brush, or milddetergents.You might notice algae or slime growth on the hull below water level. The below-watergrowth should be cleaned immediately after the boat has been removed from the water.If the growth is allowed to dry it will be much harder to remove.At least yearly, check for damages to hull and superstructures such as dents, cracks andcorrosion. Carefully check that swim/rescue ladder, handrails, cleats and secure/boweyes are not loose and has no cracks or corrosion damages.6.2.1 Aluminum treatment M-400 maintenance & principleOckelbo boats have a patented surface treatment on all aluminum surfaces, called M-400®. The treatment bonds to the aluminum and strengthens its already impressivecharacteristics, giving the boats hull a fantastic shine while preventing oxidation.M-400chemical resistance is significantly higher than untreated aluminum.We recommend regular rinse with clean fresh water on M400 treated surfaces. If you donot allow aggressive substances to "burn", the surface works relatively self-washing(hydrophobic) with fresh water. In that case, collections of salts and soils are washed