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Is your vehicle behaving erratically and experiencing problems running smoothly? Is it backfiring or getting a less mileage for the gallon? If yes, it might be because of the ignition coil pack failure. These devices are designed to take power from the generator and relay it to the spark plugs.

By so doing, the ignition coil pack helps ignite the fuel and make the vehicle run fast and smooth. Whenever you notice that your vehicle is experiencing an ignition coil failure, the first thing to do is to go for the best ignition coil pack, and then use it to replace your old brand.

This is because the best quality ignition coil packs are durable and highly functional. They are also easy to install, given their small designs. Here are comprehensive reviews of the top performing ignition coil packs to ensure easy buying experience.

These ignition coils are available in a pack of 8 to make sure you have them at your disposal. They are not just well built but also they are endurance tested, so they can resist a number of common stresses that tend to cause failure. These ignition coils are also easy to install and comes with premium quality copper for specific application.

Plus they boast high energy output and low emissions. The proven materials used to make them include high performing wires and wire coating, which resists cracks, imperfections, and pinholes. A bad coil is to blame in the event that your vehicle begins to misfire.

These ignition coils are direct replacements for the factory Audi or Volkswagen coil. They are designed by an OEM Original Equipment supplierand this means they exceed the factory standards and quality. Use them to get your car engine running fast and smooth. These ignition coils are designed according to the highest standards of precise and quality specifications.

They are a direct replacement part.

mercury coil pack

These units are also compatible with several brands of Nissan including Nissan Altima — 2. They contain copper wirings that help enhance their performance.Due to shipper and supplier delays, your order may take longer to arrive. Display Options. Already know the part number you need? Click here to enter them directly into your cart. If you are an international customer who ships to a US address choose "United States delivery" and we will estimate your ship dates accordingly. If you are an international customer and would like to change the currency that prices are displayed in, you can do so here.

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mercury coil pack

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How To Diagnose Bad Coil Pack. NO TOOLS!

Refine results by: Current Vehicle Recent Vehicles.Armaan Almeida was an Automotive Editor who produced buying guides and sneak previews, in addition to publishing daily news stories and tracking monthly deals, incentives and pricing trends from Toyota, Nissan and Lexus. On newer vehicles, a coil pack replaces the distributor. It is an electronically controlled pack of ignition coils regulated by the car's computer and is used to create the spark for each engine cylinder's spark plug.

Generally speaking, coil packs are much more reliable than distributors, because there are no moving parts and because they fire much less often than a distributor. Coil packs usually create a better spark, which in turn produces better combustion and horsepower in a car's engine. When creating a spark at the spark plug, the fire must initiate from a high voltage supply, so as much fuel as possible burns in the cylinder. Whenever the combustion process is started, the coil pack builds up the energy, as much as 50, to 75, Volts.

When the electronic control module the car computer sends the signal to the ignition control, the voltage is released from the coil pack through the spark plug cables to the spark plug.

When the spark travels to the spark plug, it jumps from the spark plug gap to the ground, causing an explosion of the fuel air mixture inside the cylinder chamber. Usually, if a coil pack is bad, there will be a loss of fire or spark in one or more cylinders. This causes what's commonly referred to as misfiring. Misfiring can cause drag on the crankshaft, and usually results in a very poor performing engine. A faulty coil pack will generally have symptoms similar to a faulty spark plug.

Some of the most common tell tale signs that a coil may be defective include:. Fortunately, there is an easy way to test the coil packs in your vehicle and make sure they're working as they should. You need to use ohm meter to test the coil pack for continuity. Make sure you have the approximate ohm values for the coil pack. To find this information, research your car's engine on the Internet or purchase a Chilton's or Haynes manual to find out what the mega ohms reading on the coil pack should be.

Whereas in the past, vehicles used a distributor to pass the thousands of volts needed to create a spark from the ignition coil to the sparkplugs, modern ignition systems now use one coil for each sparkplug or in some cases one coil for two sparkplugs. Many times, these multiple coils are mounted in a single mounting block with multiple terminals, thus the term coil pack. Coil Pack Advantages Coil packs began to be implemented in many vehicles during the late 's. The biggest reason most manufacturers have turned to coil packs is they are more reliable.

Many coil packs don't require service for up totomiles. Also, distributors are very prone to failure if they become wet or the engine happens to be submerged under water for a few seconds. Coil packs tend to operate even when they have been thoroughly doused with water.

In addition to being more reliable, coil packs are generally credited with providing more horsepower and torque than a common distributor. Because a coil pack generally creates a much more efficient spark, it also known to provide a slight fuel efficiency improvement over vehicles that use standard distributor caps.

While some modern vehicles do still use a distributor system, there are aftermarket upgrades that many car enthusiasts add to improve performance, reduce maintenance and improve fuel economy.

Most rotary engines require a different type of ignition coil pack.

Ford, Lincoln, & Mercury

Below are two, one for a standard replacement, and one that is a higher voltage performance type coil pack. Original Equipment Replacement Beck Arnley is a well known name in the automotive ignition parts industry. They are favored by many mechanics, especially those that work mostly on import cars. The Beck Arnley rotary engine coil pack is a direct replacement for original equipment parts on older Mazda cars with a rotary engine.

Their part number PAK is a high performance ignition coil pack for the performance enthusiast who isn't afraid to spend a little more on a high quality high performance part.Outboard motor electronics are sometimes troublesome, particularly since major systems like the power pack may control everything from instrumentation to the timing and synchronization of the motor.

You can test the Mercury power pack in either one of two ways; one method requires you to use a multimeter, to test the power pack directly. The other method requires you to do a bit more work, but may give you a more definitive answer. Note the routing and connection points, then disconnect the primary wire or wires from the ignition coil.

Disconnect and test one coil at a time when testing multiple ignition coils on the same motor to help prevent confusion when reconnecting the wiring. Select the resistance scale on the multimeter. Place the positive probe of multimeter on the green and white striped terminal wire pin and the negative probe of the multimeter on the terminal pin for the red and yellow wire.

Primary resistance should be less than 1 ohm, about 0. Check the ignition coil secondary resistance between the spark plug lead tower and the ground terminal pin for the black wire; the meter should show between ohms and ohms. Repeat the process to ensure that you only probed the proper wires and connectors if tests are out of specification.

Make sure the ground was good -- not painted or insulated when checking with a ground on the motor. Replace the coil if readings are out of specification after re-testing, and if no other causes can be discovered. Reconnect the wiring when the testing is complete. Remove one wire from the suspect power pack. Plug it into the appropriate connection on the functional power pack. Continue to remove and reconnect wires until all of the wires are removed from the suspect power pack and connected to the functional power pack.

Ground the functional power pack to the motor. Start the motor. If the problem is resolved, the problem lies with the power pack. If the problem persists, the problem lies elsewhere. Will Charpentier is a writer who specializes in boating and maritime subjects. A retired ship captain, Charpentier holds a doctorate in applied ocean science and engineering. He is also a certified marine technician and the author of a popular text on writing local history.

Items you will need Multimeter Functional power pack.A bad oil pack can make your Mountaineer almost un-drivable.

Coil Packs take the place of the distributor and coil in older vehicles. The symptoms of bad coil packs are almost the same as bad spark plugs. If you do need to replace them all, they can be somewhat pricey.

New OEM Mercury Ignition Coil Pack 856991 Fits V-150 V-175 DFI 2.5L Engine

It is possible to isolate which coil pack is bad by using a multimeter. This can save you a lot of money over just replacing the whole set at one time. There are a lot of potential symptoms related to bad coil packs in your Mountaineer. We always recommend using an OBDII scanner to pull your trouble codes if the service engine soon light is on. It can really narrow your search down. The check engine light is one of the most common symptoms of bad Coil Packs.

More often than not, your engines computer will be able to detect bad Coil Packs in your Mountaineer. If acceleration has diminished, it should be felt. The less cylinders that your engine has, the more that one cylinder not firing properly will have an effect on engine performance. The less efficient the combustion of your engine, the more fuel is going to be wasted. This leads to a decrease in fuel economy.

When you take your vehicle in for a tune up due to decreased fuel economy, checking the ignition system in general including the coil packs is going to be one of the very first places that a mechanic is going to look at.

Misfiring is the most common symptom of bad Coil Packs. Anything else that you may feel is a result of the misfiring itself. The real question is, what is causing the misfire? There are also non ignition related circumstances that can cause a misfire.

mercury coil pack

That would include lack of fuel pressure, bad fuel injectors, or even a timing chain or belt that has jumped. Since there are so many reasons that a vehicle can misfire, we recommend testing for trouble codes first. When a Spark Plug is misfiring, it is often most pronounced at idle speed. This is because when the engine turns slower, it is easier to detect. Be aware that almost all symptoms of a bad coil pack in your Mountaineer could also be other issues with the ignition system as well.

Good luck diagnosing the problem! Feel free to leave a comment below if there is anything that you would like to add.

There are several misfire related trouble codes. A random misfire means is that a misfire is detected, but the ECM is not able to determine which one it is coming from, or the misfire is occurring randomly.

For example, P is for a misfire in cylinder 4 in the firing order. This makes diagnosing the misfire a bit more straightforward. There are other misfire related codes as well. Fuel Economy The less efficient the combustion of your engine, the more fuel is going to be wasted.Outboard motors are designed to provide years of trouble-free operation, and nothing spoils a weekend outing like one that will not run properly. Maintenance on these engines is relatively straightforward, and many of them sit for an entire off-season without being started.

When problems do arise with the ignition system it is rarely the coil, but they do sometimes fail. The coil on your outboard is a sealed unit. The body should be completely intact and free of cracks. If an oil-filled coil is wet on its outside surface, it is cracked and leaking.

It should be replaced. If the coil is weak or damaged it will produce less spark energy than it is designed to. This will produce a weaker spark at the spark plug gap, making the engine harder to start.

Spark plugs that are continuously fouling can indicate a weak spark. If the coil is not producing enough voltage it can cause the engine to run erratically. If the problem seems to come and go, such as smooth acceleration and then rough acceleration, it could indicate that the coil is not able to maintain a steady voltage output.

If the coil has failed completely, it will no longer produce any voltage. Without the increased voltage of the coil, the energy at the spark plug will be insufficient to jump the gap. This will result in the outboard failing to start.

Gary Proulx has been writing since He specializes in automotive technology and gasoline and diesel design. Proulx has had multiple articles published on various websites. He is also an archery expert who writes about the ins and outs of archery as a sport. Cracked Body The coil on your outboard is a sealed unit. Hard Starting If the coil is weak or damaged it will produce less spark energy than it is designed to.

Engine Misfires If the coil is not producing enough voltage it can cause the engine to run erratically. About the Author. Photo Credits.Last search: 1 days ago Update Now. There are no questions for this product. Ask a new question and receive an answer, directly from our support staff. Ordered and replaced both coils as well as wires and plugs for complete coverage. I have a 50 hp motor that I am trying to get running for a friend.

I am not sure why I am not getting a spark. I have replaced plugs and power pack I have the the 3 coils for this but it id getting to late in the year to keep working on this.

The motor is on a pontoon which is in the yard. Any suggestions are welcome. I do meed to teplace the starter also it will not return the gear whrn the key is turned off. This guide is to be used as a reference only. You must verify fitment using your model or serial number. Parts Diagrams: Select Your Engine. Year Engine Model Go. This product is not being produced anymore however may still be available through other dealers. Last search: 1 days ago Update Now No searched locations carry this part.

Product Description Mercury factory part. Awesome job.

MERCURY Ignition Coils

Parts were shipped quickly and had me back on the water. Problem fixed: No spark on top cylinder. Best place to buy outboard parts!

Very nice, smooth order and follow through. Thank you Very nice, smooth order and follow through. Thank you 11 months ago by Steve. We are very impressed with the service and quality of the products We are very impressed with the service and quality of the products Oct, 11 by George.

Sep, 21 by Douglas. Very good so far. Sep, 14 by Thomas. Problem fixed: Great turn over but no spark I have a 50 hp motor that I am trying to get running for a friend. Okay, prompt delivery, all parts ordered were sent. Sep, 11 by Joey. Jul, 12 by Aron. Excellent Excellent Jul, 12 by Stephen. Oct, 16 by Michael. Jul, 13 by Donnie. Jun, 19 by Keith. May, 13 by Dale. Crowley Marine has the parts and they get them to you fast.