The following is meant to apply only to small outboard boats under 16 feet 50 horsepower or. Is there one and where can I find it? Is there a set of step by step instructions? This is because no two boats are alike. But some generalizations can be. Note 1 : I will not deal with the wiring specifically for the outboard motor and controls. Here is a web site where you can obtain wiring diagrams for most outboard motors.
Most new outboards come with a wiring harness and a manual that has wiring diagrams. Note 2: If you are re-wiring a boat with an electrical system installed: Don't rip out that old system yet! Use the old system to help make a plan in steps 1 through 7. Trace out each wire and put that on your diagram.
This will make it far easier to locate wires and equipment. Wait until you actually start installing wiring in step Then replace each set of wires with new. This may take a little more time, but Aluminum Boat Building Books Pdf will result in far fewer mistakes and less troubleshooting. Step 1. Make a Plan. Decide what you want to install, and where it will go. Step 2. Draw a simple schematic diagram that shows each piece of equipment, the fuses, switches, and how all of this will be connected.
Here are two alternative examples. Click on the diagram to expand. Just make a box or circle and write in what it is, or you can use a picture of the item. Remember, any 12V DC device has to have at least a positive and negative wire connected to it. Put a plus or minus next to the wire or use red for positive and black for aluminum boat building books video. On Metal boats do not use the hull as a return path.
None of aluminum boat building books video wiring should be electrically connected to the hull. Here is a link on how to draw electrical diagrams. There are several ways to do. The most important thing aluminum boat building books video that you understand what you are diagraming. It needs to be simple enough and clear enough for you to be able to refer to it in the future and stiil understand what each item is, what the wiring is and aluminum boat building books video each item of equipment is tied into the electrical.
That way, in the future if you want to add or subtract equipment you can do so by referring to your diagram and determining where and how it fits into the. Step 3. Batteries: Decide where you will put the aluminum boat building books video. Later we will decide the capacity and type of battery but for now we only need to decide where to put it. The battery is the source of power for starting, instrumentation, and lighting. There may be a second battery on some boats for running a trolling motor or other equipment.
Batteries should not be too close to anything that can cause an accidental short. There should be 12 inches of space all around. Batteries must not be directly under or over fuel lines or under other electrical equipment such as a charger or inverter. If they are, there must be a floor or panel separating. Batteries need to be in a space that is ventilated to the atmosphere. If the battery is in a box the terminals are protected against accidental contact with tools.
If it is not in a box the terminals need to be covered with a boot or some other device that protects them from contact. The battery should be close to the engine. Since starting current is so high, and the wires to the starter are not aluminum boat building books video, you want to keep the wires as aluminum boat building books video as is practical.
How big a battery capacity, not size do you need? There is aluminum boat building books video non-electrical consideration; weight. Batteries weigh a lot. Think about how the weight of the battery will affect weight distribution on your boat, especially if it is on the same side as the helm and controls.
You may have to move aluminum boat building books video to balance the boat side to. If you have a very low transom, how will the weight of the battery affect the water line at the transom? Step 4. Where the battery is located determines where the battery switch goes. It should be close to the battery but easily accessible to be switched off in an emergency. The battery switch is necessary to turn everything off when you are aluminum boat building books video using the boat.
A good brand is Perko but there are. Avoid any battery switch that is not UL Marine Listed. There are cheap ones on the market that will get hot and melt. Also a battery switch must be ignition protected.
Ignition protection means that it will not ignite gas fumes if they are present. This is extremely important if you have a fuel tank in the same compartment.
Most small outboard boats have a motor well forward of the transom and the space under the motor well is where the battery, bilge pump, battery switch and fuses, and most importantly the fuel tank are placed. It may be a portable tank. If it is, it vents into the compartment. If it is a permanent tank it will have an overboard vent, but if there is a leak, it will leak fumes into the compartment.
You don't want anything in there that will set this off. So use ignition protected components. Submersible bilge pumps are usually ignition protected. If you use circuit breakers instead of a fuse they must be marine ignition protected circuit breakers.
However, batteries are not considered a source of ignition because there are no moving parts to cause a spark, but if you make accidental aluminum boat building books video with metal tools it can create an arc. That is why the terminals must be protected, and why battery switches in this compartment must be ignition protected. Buy a switch that has a provision for two batteries because you may want to add a battery in the future.
The 1 position uses the one battery and allows charging of that battery aluminum boat building books video the engine is running.
The 2 position uses and charges the second battery, if there is one, and the BOTH position puts the two batteries in parallel doubling the capacity and charging both at the same time.
Step 5. Next we need to install a fuse block close to the battery switch. Standard wire loom is fine. The thing to remember here is, the fuse is there to protect the wire! Not the equipment. If you overload wiring it gets Boat Building Books Australia Video hot, melts and starts a fire. This fuse is in the main power feed aluminum boat building books video the instruments and all the electrical equipment so it will most likely be 15 amps. But we will determine that later.
See Step Buy a fuse block with two fuse holders. That way you have a spare if the fuse blows. Step 6. Determine where each piece of equipment will be. Think about where you want things to go. Depth finders need to be where they are easy to see, but not blocking your vision when operating the boat. Radios should be where the operator can easily reach the controls, and reach the mike if this is a marine VHF radio. The back of the console or place you are mounting them needs to be easily accessible for mounting the device and for access to the wires.
Step 7. Locate the fuses, buss bars and switch panels. Use the locations of each piece to decide where to put fuse boxes, buss bars, switch panels. Each of these must be close to the aluminum boat building books video they power, and easily accessible to be worked on.
They cannot be hidden behind equipment or inaccessible panels. This may sound obvious, but I have seen some very bad installations. Also they should be where they are protected from spray or rain.
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