Boat ignition wiring

Learn how to properly wire a marine ignition switch with this detailed wiring diagram. Get step-by-step instructions and diagrams for connecting the ignition switch to the battery, starter, and other electrical components in your boat. Ensure a safe and efficient electrical system in your marine vessel.

Affiliate Links:Buy the Yamaha Ignition Switch Replacement here - https://amzn.to/3GzdmgbBoat Ignition Switch Wiring Diagram / carol barton. Vw Beetles. Volkswagen. Automotive Upholstery. Vw Aircooled. Vw Engine. Vw Bug Interior. Vw Käfer. Johnny Jacobs. Ignition System. Car Starter. Motorcycle Wiring. ... Ignition switch wiring color code: Interestingly, a vehicle's ignition switch is responsible for powering up or turning off ...Jun 6, 2014 · Engine instrument gauges fall into three categories, and there are differences in the terminals and wiring. The vast majority of recreational boats in service today are still using analogue instrumentation systems. More modern digital, NMEA-networked, and multifunction gauges may be all the buzz, but the reality is that most boats are still ... On Sunday morning, a cruise ship rammed into the side of the San Basilio terminal in Venice — hitting a smaller tourist bought and injuring four people. On Sunday morning at 8:30am...Kings' Outdoor Life #49 - Boat Ignition Switch Installation. Kings’ Outdoor Life. 1.38K subscribers. Subscribed. 119. 25K views 3 years ago. Today we show you How to replace ignition switch...

The top reason ignition coils fail is bad spark plugs or plug wires. Another potential cause is heat and vibration, which can damage the ignition coil’s windings and insulation. An...1 - 24 of 151 results for Marine - Ignition Parts Compare Refine. ... Sierra Marine Spark Plug Wire Set - 18-8803-2. Part #: 18-8803-2 Line: SIE. Limited Lifetime Warranty. Compare. Sierra Marine Ignition Systems - 18-5431. Part #:Tighten the nut. Advance to the 8 o'clock position on the ignition switch's rear panel, where you will find the "A" terminal. Loosen the nut and slip the spade connector of the solid purple wire beneath it. Tighten the nut. Go clockwise again, to the second "M" terminal. Loosen the nut, as you have with the other terminals, and slide the spade ...Jet Boat Engine Harness Diagrams. Here are 4 different engine harness diagrams, complete with wire gauge and colors. Two of them show points ignition w/1 wire and 3 wire alternators. The other two show HEI ignition w/1 wire and 3 wire alternators. If you're using an aftermarket ignition such as an MSD, be sure and follow their instructions for ...In conclusion, corrosion, faulty ignition cylinders, and wiring problems are some of the common issues that can occur with ignition switches on Bass Tracker boats. Regular maintenance and inspections can help prevent these problems and ensure the reliable operation of your boat's ignition system.Standard Boat Wiring Color Codes. These are the most common color codes used in boat wiring. If you are looking for a new wiring harness setup check out the options on our Wiring Harnesses Page. Black. Grounds, General. Black/Brown. Pump Grounds. Black/Red. Voltmeter Grounds.

The ignition switch is a critical component in the wiring diagram as it controls the power supply to the outboard motor. It allows you to start and stop the engine, as well as control other electrical systems such as lights and accessories. ... They produce sparks that ignite the fuel-air mixture, creating the necessary power to propel the boat ...3,730. Jan 9, 2011. #3. Re: 25 HP Evinrude Ignition Switch Wiring 1978 Lowe Boat-Help! As the Admiral noted you need a marine switch. But not any marine switch, you need an outboard switch. Your engine shuts off from the ignition being grounded when the switch is turned to off. An automotive switch is missing this feature.Jul 18, 2011. #4. Re: need help wiring boat stereo. The new stereo probably has a red power wire and a yellow. The red is intended to be switched on and off with the ignition, the yellow is to have power all the time regardless of ignition. This is to retain the time on the clock, and radio station memory. In a boat that is not used every day ...Step 3: Soldering "B" Terminal. Next, pull up the ignition cable through the hole in the dash. The terminal on the switch which is marked as "B" has to be located. Then find the red wire in the ignition cable with a purple stripe throughout its length. Using soldering iron, solder it to the "B" terminal along with the rosin core solder.I'm at my wits end locally and cannot find any help at the boat shops. I opened up my merControl to replace the ignition switch to find the wiring inside was corroded and unsafe. My question is am I able to change to this type of controller for ignition and throttle. The current harness to the engine is a right angle plug.

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28,762. Apr 8, 2009. #4. Re: 6-pin Push To Choke Ignition. I suspect you have a main engine harness problem. Try disconnecting the big harness plug at the engine. Check the condition carefully and clean both the male and female terminals. Connect and disconnect the plug a couple times to sort of burnish the terminals.The Skeeter Boat Wiring Diagram includes all the information needed to properly wire the boat's electrical systems. It includes diagrams for the battery, ignition switch, engine and fuel system, main DC and AC circuits, navigation lights, bilge pumps, and more. Moreover, it also includes detailed instructions on how to safely wire the ...The wiring diagram for Stratos Boats usually includes the battery, the main control panel, the switch, the starter, and all other components on the boat. The diagram should show where the wires are connected and how to connect them as well as where the different components are located. All components should be clearly labeled so that you …These wiring harnesses were designed for use in custom engine installations that use an MSD Ignition Box. Don't suffer from a tangled spaghetti-wire nightmare. Both the custom and universal harnesses are engineered of the highest quality wire, connections, terminals, and components. Harness is 6 ft. long.Mercury outboard wiring diagrams mastertech marine bulldog security boat ignition switch with key replacement for mariner motor control box 2 keys 3 position 6 wire connectors replace 87 17009a2 17009a5 online in tunisia b0933lb56z push choke hungary b08f2dhz1b 5005801 and lanyard evinrude johnson omc crowley yamaha f250 the hull …Then I changed the 90 amp fuse on the starter. That was blown. However, boat still won't start as is. I've checked all the fuses under the dash and all are good. Ultimately determined no power is getting to the ignition switch via the common wire coming into it. Connected power wire from the blower to the ignition and the boat starts right up.

MPS RacingGripple wire joiners make it easy to connect the two sections of fencing as it makes that turn. They can hold the wire tight in two directions. Expert Advice On Improving Your Home...Step 12: Attach the Ignition Wire. Attach the ignition wire to the "IGN" terminal of the vehicle's ignition switch. The central terminal serves the car's ignition, wipers, accessories, and other operating features. It is essentially the default "run" position of the ignition switch.Nov 12, 2021 · Ignition Switch Boat Push to Choke 6 Wire Base Mercury - inner seal between cylinder lock and contact plate [Fitment] 6 wire boat ignition fits for Mercury applications w/Potted Wires replacing OE#'s Listed - 6 wire marine ignition switch replaces for Mercury part number: 87-88107 , 87-88107A5, 7-1155. Dummies pontoon harness ignition evinrude. Sweetwater pontoon boat wiring diagramInstalling a stereo system on a pontoon boat Pontoon boat wiring diagramHow much do pontoon boats cost. Pontoon stuff provides materials to make my toon newInstalling boat wiring harness Pontoon boat wiring diagramPontoon schematics tracker. Check DetailsWell, I manage to get it working, but it's an emotional journey of ups and downs.Purple (Pu) Ignition Instrument power Ignition switch to coil and electrical instruments , Distribution Panel to electric instruments. Dark Blue Cabin and instrument lights Fuse or switch to lights. Light Blue (Lt Bl) Oil Pressure Oil sender to gauge. Tan Water Pressure Temperature sender to gauge. Pink (Pk) Fuel Gauge Fuel sender to gauge.Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors - Replace Mercury Ignition Switch 87-17009A2 87-17009A5 ... Remove the old switch, swap the wiring, and reinstall the new one. Literally took 5 minutes and works great. Sure beats jumping the starter each time I want ...Alternators typically use four wires which connect the ground, output, sensor and ignition indicator. These are known as the L, IG, S, B and F terminals. Alternators are ground eit...The kill switch is a simple ON/OFF switch that completes an electrical circuit to the motor when it's on, allowing it to run. When the switch is off, it breaks the electrical circuit to the motor, preventing the engine from running. It's attached to the helmsman, either physically or electronically. If the helmsman is thrown from the boat's ...

Aug 11, 2022 · Engine instrument wiring made easy boats com continuouswave whaler reference ignition switch maintaining johnson evinrude 9 outboard motor f5h268 f5h078 9100 9830 9760 5005801 mp41000 mp41070 2 mp52000 mp51020 mp51030 mp51040 mp51050 outboardignition chrysler diagrams mastertech marine icon touch 4 3 powering off barnacle bill s supply help gauges the hull truth boating and fishing forum ...

40,788. Mar 10, 2015. #2. jerryt said: I am trying to hook up my ignition key wiring on my 1988 35 hp Force. There are a couple wires that are not there. There is no WHITE wire from the coil, a BLUE wire from the coil (the BLUE wire actually goes under the CD MODULE to somewhere I don't know) , or no PURPLE wire for the tachometer.Boat Wiring & Cable; Marine Batteries & Accessories ... Ignition wiring diagram for 60 hp Mercury. Thread starter Justwantorelax; Start date May 21, 2018; J. Justwantorelax Cadet. Joined Jul 12, 2008 Messages 23. May 21, 2018 #1 Model 1a60453kz Can anyone help. Need this fixed asap.The 4.3 MerCruiser engine is a popular choice for many boat owners due to its reliable performance and excellent power output. It is a V6 engine with a displacement of 4.3 liters, delivering a maximum horsepower of 220. One of the notable features of the 4.3 MerCruiser engine is its fuel efficiency.Jul 6, 2007. #6. Re: Two M's on ignition switch? Those two terminals are what kills your engine. The magneto is the ignition system. When you turn the key to RUN, those two terminals are open so the engine will run. When you turn the key to OFF, those two terminal close, shorting the ignition system to ground hence killing the engine.I need the wiring schematic for the ignition switch with push key primer on a tracker nitro <br />640 with a 75 hsp. mercury engine. I am not hearing the primer solenoids click when the key is pushed to prime the engineBoat, an electronics and lifestyle startup in India, has raised $100 million in a new financing round that many independent investors termed as the most successful hardware startup...American hot rods are a type of modified car inspired by the classic American muscle cars of the 1950s, 60s, and 70s. Hot rods typically feature a large, powerful engine, a low-slung body, and a distinct style. Popular modifications include custom paint jobs, wide tires, and loud exhausts. Hot rods are part of the larger American car culture ...The throttle control (mercontrol - exactly like the one pictured) has a key ignition in it. The boat also has a key ignition that I'm assuming was for whatever engine was initially on the boat in '76. It's not wired up. The engine harness carries the wires from the throttle control to the engine and based on the wiring diagram I found most of ...2018 Triton Boats 19 Trx For In Bloomsburg Pa Towne Marine Llc 570 784 8564. X Home Cell Starting And Running Problem 2008 Mercruiser V6 2 Bbl Lh Rotation Engine. Trolling Motor Wiring. Boat Livewell Timer Installation. Triton Systems Manual.521. Mar 29, 2009. #7. Re: "keyless" ignition. For starters you could jumper from the "On/ Start" to the "Run" through your new switch. It has to be a momentary, like a spring loaded toggle or a push button, Normally its a push button. In this way you turn the key to "Arm" it and the push button engages the starter.

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Off-Ign-Start 3-Position Ignition Switch by Cole Hersee®. Universal Start Switch suitable for Muse in marine environments. All-brass construction. 3 positions Off-Ign-Ign/Start Offsite info on Marine Ignition Switch wiring. What can be...Step 2: Disconnect the battery. One of the first steps in wiring a Mercury 6 ignition switch is to disconnect the battery. This is an important safety measure to prevent any electrical accidents or damage to the wiring. Disconnecting the battery ensures that there is no power flowing through the system while you are working on it, reducing the ...Key Points: – Marine ignition switch wiring involves connections to the battery, starter motor, accessories, and ignition circuit. – The battery connection provides power to the …302. 48K views 1 year ago. Capt. Chris of Buzzards Bay takes a look at a common Evinrude/Johnson ignition switch with integrated clip-on safety lanyard (BRP part No. 5005801). You'll see how the...Electric Choke Boat Ignition Wiring 12 Sep 2023. Wiring choke electric diagram holley voltmeter carb volt edelbrock meter car automotive wire gauges tech wired Switch wiring ignition question wire fuel gauge power go thanks Choke electric wire hooking. Q&A: Wiring Diagrams for Chaparral, G3, Volvo Penta, and More ...Marine ignition switch wiring typically involves several key connections and circuits. One important aspect of marine ignition switch wiring is the connection to the battery. The ignition switch receives power from the battery through a dedicated wire, usually labeled as "BAT" or "B+". This connection provides the necessary voltage for ...Mercury outboard wiring diagrams mastertech marine bulldog security boat ignition switch with key replacement for mariner motor control box 2 keys 3 position 6 wire connectors replace 87 17009a2 17009a5 online in tunisia b0933lb56z push choke hungary b08f2dhz1b 5005801 and lanyard evinrude johnson omc crowley yamaha f250 the hull truth boating fishing forum seastar solutions voltage regulator ...1,350. Jul 20, 2014. #3. I've got an '82 30HP and a factory manual for it. Shows schematics for starting system for both magneto and cd ignition. Based on mine, the pink wire is part of the cd ignition. See if this helps (based on mine), from the keypad: black to ground. yellow and blue run from the choke switch.Buy Boat Motor 84-896542T01 Ignition Wire Adapter Harness Assembly for Mercury Mariner Quicksilver Mercruiser Outboard Engine Remote Control Box, 8 Pins to 14 Pins, 1ft /0.31m: Wiring Harnesses - Amazon.com FREE DELIVERY possible on eligible purchasesMercElectric Switches.....Ignition & Starter Types . 1966 and newer Merc 7.5 & 9.8 (1975).....Ignition Wiring Rope Start Merc 7.5 & 9.8 (1979-UP).....Ignition Wiring Rope Start Merc 7.5 & 9.8 (1979-UP).....Ignition Wiring Electric StartNexsens Uw6 Power Bulkhead Connector Assembly. Mercury Outboard Replacement Ignition Switch Push To Choke Wire Ends 2 Keys 34 99 Picclick Uk. Engine 87 17009a2 Ignition Switch For Mercury Outboard Motor Control Box 3 Positions 6 Wires Sierra Mp41070 2 Online At Best S In Srilanka Daraz Lk. Boat Ignition Switches West Marine.For narrowboat AC wiring we would recommend as a minimum the use of 2.5mm square Acrtic Blue 3 core multistrand cable (or equivalent) for all connections to shore and also for internal AC wiring. Multi-strand Automotive/Marine Cable. Solid single core cable, such as the standard household type is not allowed for new builds. ….

Boat Wiring & Cable; Marine Batteries & Accessories ... Ignition wiring w/ push button start. Thread starter ktrahan81; Start date Jun 27, 2011; K. ktrahan81 Recruit. Joined Jun 21, 2011 Messages 3. Jun 27, 2011 #1 I have a 1972 50hp Evinrude. I am trying to install the push button to start.Boat lectical base kits: https://tbnation.net/products/weekend-warrior-electrical-kitTrolling motor wiring kits: https://tbnation.net/products/trolling-motor...The ignition system in your car generates between 20 and 30 thousand volts of energy, which is required to ignite the fuel in the engine. The ignition switch directs the power from the vehicle's 12-volt battery to the starter solenoid and the car's accessories.I need a wiring diagram for 1976 Johnson ignition push to choke. Mechanic's Assistant: Our Marine Mechanic will be able to provide you with the wiring diagram you need for your 1976 Johnson ignition push to choke. Do you have the specific model number of your 1976 Johnson outboard motor?I need to do some wire and ignition testing because I'm still only running on 1 cylinder. Going to take the flywheel off again this week. It's a 40HP 1963. Here are the pictures of wiring. (third pic is where they come out from underneath), one goes under and across to the other side (black connection) and the other goes through the transom ...Following these steps will help you successfully wire an inboard boat ignition switch, allowing you to safely operate your boat’s electrical system. Remember to always consult the wiring diagram specific to your ignition switch and refer to the manufacturer’s instructions for additional guidance.Boat Building Standards Basic Electricity Wiring Your. Sun Tracker Boat Steering Console 318058 Beige W Gauges 38 1 2 Inch. Trolling Motor Wiring And Battery Guide Minn Kota Motors. 2015 Yamaha Parts Finder Diagrams Mega Power Sportarine Lord Mi. Trying To Find A Wiring Diagram For 1998 Mercury Marine 50 Elpto Serial Number Appears Be 0g6650853 ...Be careful using the word "universal" ignition switch. There is a big difference between wiring for a magneto system as most two strokes are, and a battery ignition system as I/O and Inboards are. A magneto system requires the two "M" terminals (open circuit for run and closed circuit to stop). An I/O or inboard with a battery ignition switch ...The ignition system is a crucial component of any gasoline-powered engine, providing the high voltage necessary to ignite the fuel-air mixture in the engine'...Wiring your Jon boat is as simple as following a boat wiring diagram. However you need to be aware of how to insulate and protect your electrical wires and connections before you begin. We have included a video for wiring a Jon boat and several electrical boat wiring diagrams as well as links to some excellent additional resources. Boat ignition wiring, 9,334. Jun 23, 2008. #4. Re: Installing kill switch. You don't have to run wire back to the motor, it can be wired right into the ignition switch at the helm. Generally speaking, most boat ignition switches have an always on 12v wire from the battery. When the key is turned to the "on"/"run" position, the 12v is connected to the ignition wire ..., A Little Fyi For Voltage Problems. Page 10 Of 18 Ranger Boats For Com. Ford Ranger Wiring By Color 1983 1991. Ranger Boats Z521l Comanche Review Wired2fish. Free Ranger Boats Wallpaper 1920x1080 For Your Desktop Mobile Tablet Explore 49 Boat Bass Computer. Redarc Tow Pro Wiring Kit Ford Ranger Everest Cur …, Mar 22, 2012. #15. Re: Chrysler 75hp outboard wiring questions, Please help. Yes, simply jump from battery side of solenoid to the small yellow terminal. This will close the solenoid and allow voltage to the starter. NOW: The rectifier is wired incorrectly., Boat Wiring & Cable; Marine Batteries & Accessories ... I need the wiring schematic for the ignition switch with push key primer on a tracker nitro <br />640 with a 75 hsp. mercury engine. I am not hearing the primer solenoids click when the key is pushed to prime the engine ., 28,762. Apr 8, 2009. #4. Re: 6-pin Push To Choke Ignition. I suspect you have a main engine harness problem. Try disconnecting the big harness plug at the engine. Check the condition carefully and clean both the male and female terminals. Connect and disconnect the plug a couple times to sort of burnish the terminals., This article takes an in-depth look at the wiring diagram for a boat ignition switch and explains each part in detail, as well as its purpose and how the switch works. The Major Components of Wiring Diagrams for Boat Ignition Switches One of the most important components on a wiring diagram for a boat ignition switch is the battery, or batteries., Buy Pro Marine Ignition,Wire Set GM 2.5L 3.0L 4cyl w/Delco EST 1990-Up: Wire Sets ... Ignition,Wire Set GM 2.5L 3.0L 4cyl w/Delco EST 1990-Up Pro #: 93056 Replaces: 84-816761Q14. Product information . Technical Details. Brand Name ‎Pro Marine : Manufacturer ‎Pro Marine Parts :, Ranger Boat Blank Ignition Panel 98592105 | Black 3 1/2 x 2 Inch. GLS Stock #: 7101887-AF256. $9.95. Add to Cart. Wishlist. Tracker Boat Ignition Switch Decal 174448 | Raised Black 1 3/4 Inch. GLS Stock #: 8103822-BV705. $12.95. Add to Cart., In 58, small boat wiring was pretty sketchy as compared to today's electrical requirements for safety. Typically two or three fuses and no fuse protection of the ignition circuit, which is shocking as that usually comes straight off of the battery. ... Battery can generate hundreds of amps into a short circuit and 14 gauge ignition wiring might ..., 1) Verify that you have +12 volts on the "B" terminal on the switch. That means check with a "voltmeter". If yes = that's good. If no = fix it. 12 volts passes from the large Positive battery cable to the starter solenoid. That large terminal also has a smaller wire that feeds the "B" terminal on the ignition switch., Boat ignition switch wiring is an essential part of a boat's electrical system. It is responsible for providing power to the engine and other electrical components, such as lights and accessories. Understanding how the ignition switch wiring works is crucial for maintaining and troubleshooting the electrical system., gonzo Senior Member. The bypass wire from the starter goes directly to the ignition coil's terminal. Because the voltage drops while cranking, the coil doesn't need the inline resistor. Make sure the coil you have is not of the type with internal resistance. If it is, the inline resistor will drop the voltage too much and the spark will be weak., There are other common boat wiring colors you may encounter. Here’s a list: Violet/Red: Engine or generator B+ from breaker. Violet/Yellow: I/O trim tp (ballast bypass) Violet/Green: I/O trim down. Violet: 12v ignition generator or engine. Violet or White: Trim (trailer) switch. Gray or Black: Mast light., Nov 8, 2022 · Ignition Switch Push To Choke For Yamaha And Sierra 703 82510 43 Jsp. Ignition Switch 4 Position 7 Wire Magneto Accessory Off Run Start Push To Choke Green Bay Propeller Marine Llc. Ignition Switch Key Assy For Yamaha Outboard Motor Control Box 703 82510 43 00 Sho Malaysia. Sierra Yamaha Dash Ignition Switch Exact Oem West Marine. , So I went today and fixed it! Turns out, I had the wiring harness to the solenoid, a brown and black wire, both to the top small post. The brown wire is actually the turn ignition power which is supposed to be lone on the small top post. I then put the black wire with the other ground going to the motor, both on the small bottom post., How does an outboard ignition work? In this video from Boats.net, John will guide you through the outboard ignition parts that make up your ignition system. ..., Switch key omc wiring diagram ignition kill motor 1991 boat choke 70hp push installing justanswer hp 70 remote marine color Q&a: wiring diagrams for chaparral, g3, volvo penta, and more Ignition switch 3 position with push for choke, 20,066. Nov 18, 2004. #2. Re: Yamaha ignition switch wiring. hello<br /> hopefully you have not damaged anything. we shall see. the switch you used will not work and is not wired properly. yellow is key on power,white is kill, black is ground, brown is start, blue is choke, red is fused 12v positive,pink is to the alarm horn. you must use a ..., 4 Wire Ignition Switch Diagram. The 4 wire ignition switch is the most suitable for your boat ignition switch because it is durable. The ignition contains off, on, run, and start positions. The 4 wire ignition is easy to install, and you will get two keys as you purchased one 4 ignition switch. 5 Prong Ignition Switch Wiring Diagram, The ignition system is a crucial component of any gasoline-powered engine, providing the high voltage necessary to ignite the fuel-air mixture in the engine'..., Re: Tried to hotwire my ignition, now I have no spark. The motor generates its own voltage for the ignition.(spark) If you jumped 12 volts to the motor you may have fried something in the system possibly the coils.To turn the motor off the switch shorts the ignition to ground., By following these instructions, you can easily complete the wiring process for your Sun Tracker Pontoon boat's ignition switch. With a little patience and the correct wiring diagram, you can ensure your boat runs like a dream for years to come. Fishin Barge 22 Dlx Sun Tracker Fishing Pontoon Boat. Evinrude Johnson Outboard Wiring …, The Mercury 5 wire ignition switch diagram consists of five terminals labeled “M” (Magneto), “B” (Battery), “S” (Starter), “A” (Accessory), and “I” (Ignition). Each terminal serves a specific purpose in the electrical system of the boat or outboard engine. The “M” terminal connects directly to the magneto or stator coil ..., The first problem is it is a sierra switch. The second problem is looks like switch for stern drive. Connect the red wire to B, turn key to start position, probe switch termials, looking for hot terminal, that goes off after switch returns to run position, that should make the starter work. Connect purple wire to terminal A, hot when key is on., The ignition switch is a critical component of your Sun Tracker pontoon boat. It is responsible for supplying power to the engine and other electrical components. If the ignition switch is not working properly, your boat will not start. This article will provide you with a detailed Sun Tracker pontoon ignition switch wiring diagram., Six Tips for electric wiring. 1. Power Tests. Check & test wires and devices with regard to power inside the box you usually are working in to stop electric shock just before working on them. Sometimes, even when you shut off power, some cabling may be connected to another circuit & hence may still pose a danger of electric surprise. 2., In 58, small boat wiring was pretty sketchy as compared to today's electrical requirements for safety. Typically two or three fuses and no fuse protection of the ignition circuit, which is shocking as that usually comes straight off of the battery. ... Battery can generate hundreds of amps into a short circuit and 14 gauge ignition wiring might ..., It's sensitive enough to measure AC or DC amps as low as 0.01 amps and up to 400 amps -- plenty of range for most all modern boats. Note that two "A" scales are shown, one with a wavy line under the letter "A," designating alternating current, and the other with a straight line designating direct current. Fig. 2., Boston Whaler, 1972-1993, Boat Gel Coat - Spectrum Color Find your boats Gel Coat Match Back Pumps and Plumbing View All, Buy Boat Ignition Switch with Key Replacement for Mercury Mariner Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors - Replace Mercury Ignition Switch 87-17009A2 87-17009A5: Ignition Starter - Amazon.com FREE DELIVERY possible on eligible purchases, That wire is one of two that connect to the two "M" (magneto) terminals on the ignition switch. The black wire with the connector that was disconnected probably came disconnected when you were poking around behind the instrument panel. With that wire disconnected you would not be able to stop the engine with the ignition key or the kill switch., It's sensitive enough to measure AC or DC amps as low as 0.01 amps and up to 400 amps -- plenty of range for most all modern boats. Note that two "A" scales are shown, one with a wavy line under the letter "A," designating alternating current, and the other with a straight line designating direct current. Fig. 2., the plate on the hull is = omc. the leg (drive ) is a volvo sx = ratio 1.51 , nuber are ok for volvo product. to replace the broken v8 and i have a v6 4.3 gla for sx drive and is harness . OK..... in a small boat like this..... a 4.3L V-6 could replace a 5.7L V-8 and yet allow the use of the same 1.61:1 stern drive.