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... Indmar Engine Parts - Inboard Marine Engine Parts Australia Call us: 1800-557-398 Email us: orders@rideaustralia.com.au. CDI stands for capacitor discharge ignition and this component here, just here, is the capacitor. So all I've done here is just start to pull this crimp away and then if you pull this out you can see there it's just the core folded back, that core was then pressed against there and crimped over. Whatever the size, make or model of your craft, Wholesale Marine stocks the right marine spark plug wires for it. Marine Spark Plug Wire Set for Mercury Marine V6 EFI/DFI/DTS 84-881908T 18-28086. Ignition coils have a primary and secondary coil inside them that steps up to the voltage needed to make a spark. Running from the capacitor discharge module to the spark plugs, the spark plug wires carry the electrical charge from your boat's coil to the plugs that are found in the top of the motor's cylinders. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. As we touched on a little bit last week in the spark plug video, there's two main types of coils you'll see on an outboard, there's a single coil like this with your two input leads from the CDI and then a single HT lead out. Manufactured in the USA. Starting At: Now: $9.99. Hurry! Default Title. 100% OEM Replacement OEM Wire Cores OEM Outer Jacketing and Insulation OEM Boots and Terminals High Temperature Boots OEM Terminals Tips and Tubes Then you end up with a waste spark system like this which has two leads coming in the same, there's just a single coil inside here, single primary, single secondary, but it runs two spark plugs. With that type rather than having the core get extended, you simply cut them completely flush, so it looks just like that, and then just screw the connector down. Although I was saying before it's quite robust in the sense that as soon as you've got a bit of a connection of the core against that pin of the connector or the spark plug current is going to flow to the spark plug. Now capacitors discharge very quickly, so as that current flows through the primary coil that really rapid voltage induces a voltage in the secondary coil which is then amplified again, it's stepped up to a high voltage high enough to fire the spark plug. Well that's about it for HT leads and coils, I hope it sort of gives you an idea of the basics of them, I thought it'd be a nice follow-up one just to wrap up from doing the spark plugs last week. The threaded section will go inside the insulation and then be pressed up hard against the inner core, so that's another very common type of HT lead terminal you'll see on outboards. You have to cut them to length you need they are not a pre made kit. Used on Mercruiser and OMC V8 GM and Ford marine … The reason the resistance is so low is because your primary is these thick wires so thick wires generally low resistance. NGK spark plugs are original equipment on … Champion Spark Plugs for Mariner Outboard Motors Champion spark plugs are original … Sierra 18-5227-1 Marine 9in Spark Plug Wire for Mercury/Mariner Outboard Motor. There are two main types of ignition: inductive and CDI. Free shipping on orders over $100. MARINE Spark PLUGs. Conventional (1) Delco EFI (1) Delco EST (1) ... SIERRA Premium Marine Spark Plug Wire Lead Starting from $10.79. To test the resistance of the plug itself, once again pretty straightforward, just multimeter lead in each end, like that. Much like the points in the distributor, we then have a little unit here called a silicon controlled rectifier and it's essentially a switch. Please view the application guide below. Made with OEM Marine Spec. Hurry! All prices are in Australian dolllars. CDI is much more common in outboards so that's kind of what we are focusing on. Presuming your kill switch is in, this switch is open, the current can flow through here and start charging the capacitor. Sierra 18-8826-1 Wiring Plug Set. Then the induced current comes out your HT lead, through the spark plug, and then to ground through the engine block. $74.04 $79.96. So for that reason it's bit of a trade-off, great high rpm performance, so pretty good for high revving two strokes, that kind of thing, but not as good at idle. Here you can see it looks like this so it's not the spring this time but it's a similar idea and it's crimped onto the wire here. To do some resistance tests on a multimeter I've just got the positive lead into this section with a little ohm symbol then the common which is the ground then I've got the multimeter set to ohms which is the resistance test, and you can see here now it's basically saying infinite resistance because the leads aren't touching. This video looks at outboard ignition coils and HT leads or spark plug wires. Another thing you can do is when you have the lights off and you're looking for that voltage leak, you can just spray some water around the HT leads, that way if there is any failure with the insulation it'll encourage that arcing across the ground, you'll see it straight away, you can swap the lead out. One will be on the compression stroke so this will actually fire the start of the power stroke, the other will actually be top dead center on the exhaust stroke so although the spark plugs firing, there's nothing but burnt, you know, carbon dioxide in there so it's a wasted spark. Outboard Ignition Coils and Spark Plug Wires (HT Leads). With CDI a few things change so I'll just quickly change that diagram and give you once again a very simplified version of what a CDI circuit looks like. There's two main types of ignition that you sort of see in modern motors and that's inductive ignition and CDI. Metal Core 7mm. Instead of being a switch that you throw manually with a lever it's controlled by another current like a transistor does, so in this case we have a trigger coil that sends a little current in here and when it does this SCR closes so the switch turns off. Includes: Two (2) Spark Plug Wires 14" in Length Two (2) Spark Plug Wires 16" in Length. Keep your outboard engine in top shape with quality outboard spark plug wires. Shop online and pick up at one of our more than 500 stores. A long spark is good in certain situations, certainly at idle when the motor is running quite slowly, so CDI's will sometimes even fire a couple of sparks at low rpm so they can fire them really, really quickly so they're great for high rpm, they've never sort of run out of steam, whereas the dwell time on a inductive can get so short that you actually can't produce a very good spark at high rpm. Indmar WIRE SETS 351, Indmar Part# 755007, Indmar Spark Plug & Spark Plug Wire Reference Chart (PDF), Spark Plug wire set for Indmar Ford 351, Indmar parts. The points will close and when they do, low-voltage current can come in and charge this primary coil and the length of time that charges for is called the dwell and you'll see that's often expressed in degrees of the crankshaft rotation, but there's a certain amount of time that that primary coil has to charge in order to get a good spark. Browse Canadian Tire’s selection of marine spark plugs. 2 left in stock. But the basic idea is inside your distributor you have a set of points so we're going right back to some old-school ignition. I'll try not to repeat too much the stuff that's in the old CDI video that I did a while ago but there's a few resistance tests you can do on ignition coils that are worth knowing about. Wholesale Marine offers the largest selection of marine engine parts at best prices. There's two resistances we can check in a coil, so it's called the ignition coil but it actually has two coils of wire in it so as a unit it's an ignition coil then inside there's a primary winding or a primary coil and a secondary winding, a secondary coil. This 9" wire features a Kevlar core for maximum durability and a premium silicone jacketing and boots for … Sometimes the HT lead is not actually removable, in this case this is a dual spark coil and you can see here I've just cut the end off and there's a spike here which is the terminal and then the core was up against that and then all of the outer casing inside here is glued in, so there was no way of pulling that out or winding it out. Free shipping. You are invited to join our public Boat Repair Forum to seek assistance from other members. Periodically, we'll send you tech tips, DIYs and boating information. Another common type you'll see is like this where, we take the spark plug out and then just pull this rubber boot off the end. Spark Plug Wire Set for Johnson/Evinrude Outboard... Merc Ignition Wire. Sierra 18-5750 Universal Spark Plug Boot. It's a standard Yamaha coil I think it was, two leads from the CDI unit, the HT lead, so with it cut open what you can see is here fractured, is the inner sort of metal iron core then you've got these thicker wires on the outside, they're actually the primary coil that goes on the outside and then inside here, just inside between the primary and the core here you can see there's the finer wires of the secondary windings.

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