B7Hs Plugs Marine Spark Plugs Box Of 8
1990 yamaha waverunner
How to Identify and Resolve Common Issues ?
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Measure the existing gap of the spark plug. Using your gap gauge or feeler gauge, run the tool through the electrodes to determine the measurement. Take note of the measurement and compare it to the recommended setting listed in the owner`s manual.
Spark plug gaps for car engines are typically 0.6 to 1.8 mm (0.024 to 0.071 in). Modern engines (using solid-state ignition systems and electronic fuel injection) typically use larger gaps than older engines that use breaker point distributors and carburetors.
One of the key factors that makes a spark plug work well, or not, is the size of the gap between the electrodes. If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency.
What Is The Spark Plug Gap? The spark plug gap defines the distance between a spark plug`s center electrode and the ground electrode (also called a ground strap which is a curved piece of steel at the end of the plug).
These plugs are pre-gapped at . 044″. Do not adjust gap.
Spark plugs require a precise gap to ensure proper ignition of the air/fuel mixture, and gapping them requires appropriate tools for your vehicle`s specific plugs. Therefore, if your spark plugs need replacing, go out and pick up not only the proper plugs but the tools that will make gapping them easier.
Feeler Gauge
With a wide variety of blades or wires, you`ll be able to measure almost any gap. Ideal for use with iridium spark plugs and other plugs containing precious metals, feeler gauges are more accurate than other types.
The optimum gap between 0.7 to 0.9 mm. At 0.4, 0.5, 0.6, and 1mm made more fuel consumption. Using platinum spark plug and RON 90 fuel can reduce fuel consumption to 5% on average.
Symptoms: As the gap begins to close beyond some rather broad limits, the engine will start to misfire under hard acceleration. As the gap closes even further, the engine will start to miss at normal road speeds.
Many think the larger the gap, the better. However, if the gap is too large, and the ignition system can`t provide the voltage needed to spark across the gap, or turbulence in the combustion chamber blows out the spark, misfires will occur.
In general, the smaller the gap the easier the spark jumps it, but the less probable is the ignition of the mixture. Conversely, a larger gap is harder to jump (it requires a higher voltage from the ignition coils) but the mixture is ignited more surely and consistently.
Changing the spark plug gap won`t affect the ignition timing, but it will have some affects on the ability of the spark plug to ignite the fuel.
Spark plugs that are gapped incorrectly can cause an engine to miss, or run erratically, especially during idle. The incorrect spark plug gaps can cause uneven firing of individual spark plugs and delay engine combustion; both of which can cause an engine to miss or idle erratically.
Every time a spark plug creates an arc of electricity, it very minimally shortens the electrodes. Over time, the gap between the electrodes grows larger. As this gap increases, more electricity is needed to spark ignition of the air/fuel mixture.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
Spark plug wire boot grounding out on coil, 96 outback 2.5 automatic, just put new spark plug wires, new spark plugs, and new coil on. ran great for two weeks, now spark is jumping out of boot at coil on one wire, put old coil back on and still does it in the same spot. replaced wires again, and still does it in the same spot. seems to do it only under a load. Is my new spark plug on that cylinder bad? Does the coil need some insulation under it? It is the coil that sits right on top of the motor. Any ideas? thanks.
ANSWER : Sparks are high voltage, and will always follow the path of least resistance. If you can visibly see a spark (whether in a lighted area, or in the dark), that means either that a plug wire (or coil wire) is open (non conductive), or your have a carbon track on the surface where the spark can be seen, but most likely you have BOTH problems!
If you have an ohmmeter, check the resistance of each wire involved, particularly spark plug wires … which means you must be able to connect to both ends of each wire at the same, and hopefully, FLEX those wires, to be sure they don’t have a break inside that is intermittent (comes and goes)!
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Turned poulan pro 42 inch 18.5 HP Briggs and Stratton mower off after 1hr of use to move a board I was about to mow over. Tried to restart it but it just backfires. Removed spark plug and it looked fouled. Cleaned it up but when looking at spark it is orange in color. Bought new spark plug and now get white spark. Installed new spark plug and it still backfires. Plug is wet with gas. Any suggestions?
ANSWER : Check the valve clearances and especially the inlet valve to make sure that it is not riding (staying slightly open) B&S are notorious for valve problems as most of their motors do not have a valve adjustment on them, the valves stems have to be filed/ground down to get a clearance. Somewhere between 0.010 to 0.015″ is near enough for the inlets and about 0.005″ more for the exhaust. It is not critical.
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Spark plug gap setting for 92 benz 300e 4matic
ANSWER : Look at sticker unda da hood
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I just purchased this Yamaha boat w/Twin MR-1 140hp motors, less than 100hrs (60 prox)and the starboard motor only reached 8000rpm on a 10000 redline spec (the port motor reaches 10000rpm. I have replaced the spark plugs immediatly and now the motor reaches 9500rpm. When the plugs were replaced the plug wire top of the plugs had a black powder residue (like graphite)and #1 & 4 plug electrode end were black minimal soot and #2 & #3 had a white color residue on the ceramic.
Any suggestions to attain the full 10000rpm?
A Yamaha dealer is 100 miles, so I would like to fix myself if possible. Thanks
ANSWER : I never rec’d an answer…..I WANT A REFUND!
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What is the spark plug gap size for a 2000 kia sephia?
ANSWER : The gap size is .044 for a Platinum tipped plug in a 2000 Kia Sephia but if You are using E3 Plugs, You have NO Gap to set. It’s a 360 degree firing plug that You install and forget about.
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I have a multifunction sports watch that i bought from Big W, (no brand name)
By accident i set the watch to 24 hour time, originally it was set to 12 hour time, how do i set it back? ive tried every button combo including the button combo i used when i accidently set it on 24 hour time, the instructions only say how to set the time and date, it doesnt say how to toggle between 12 hour and 24 hour time, is there a generic way to toggle it on sparts watches? btw, holding the mode button in does nothing on my watch, no matter how long i hold it in for
ANSWER : Hi. How may buttons do you have, 3 or 4 buttons?if you have the 4 buttons, try this:You need to go through the time and date settings again. The 24 and 12hr format select is at the end of time/date adjustment.To set the time and date:-press the top-left button then right-top button to set the seconds, press bottom-left button to set hour then press top-right button to adjust hour, press bottom-left button to set the minute then press top-right button to adjust minute. To set date, press the bottom-left button then press top-right button to adjust month, press bottom-left button then top-right button to adjust day and finally press bottom-left button to set the time format then press top-right button to select 12hour format. Press top-left button when done.Since you have a generic sports watch, it is hard to write specific instructions to set the time format. If your watch has different ways of setting the time, just remember that the 12/24hour format is usually at the end of time and date adjustment.Let me know if you have questions. Good luck.
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No spark to spark plug
ANSWER : Try checking the coil
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