The Gap setting is for checking how good the Coil is the numbers are foe KV ( Killer Volts ) the lower the number the weaker the coil, a good coil should read 30, to 40,000 KV it's a good tester to see how good the coil is.
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Love these videos, Shane. The gap will be different if you keep the plug inline, since in that situation you are jumping across two gaps. Voltage drop across the spark plug (in series) should result in lower voltage drop across the tester. I really like that style of tester because you don't need to remove the plug, so you get the test done in half the time.
On the last tester, open spark one…the SE means small engine. The 20,30,40 is on kilovolts…most cars are 20-30….some ecoils in some modern cars are 30-60. Set the tip to the number.
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I wish these things came with a proper scale. The markings are not quite in kV as you see on all these videos and websites. A 10 mm air gap in dry air between tips is about 30kV, increasing almost linearly. But it varies with humidity. At about 60% relative humidity, it is only 8 kV per 10 mm. If your compression ratio is 10:1 that means if your spark jumps 10 mm on the tool, it can jump about 1 mm of plug gap under compression, or more likely 0.8 mm because of the fuel vapour. I hope this comes in handy for people testing coils and remember to keep your hands clear because the sparks are pulsed and high voltage. Also check the zero on your tool.
Shane, I love these videos but it is not really the compression that would prevent spark but the density of the fuel/air mixture caused by the compression that would prevent a weak ignition system from being able to spark across the gap. The thing to think about is as you compress a fuel/air mixture you increase the density of the medium so it takes a greater amount of energy to spark across the gap.
Novice here. Can I attach the spark tester as you indicated but grounded to spark plug and actually run the motor ie outboard to determine spark and also increase gap as want to ensure all ignition coils on outboard are at full strength. Thank you and enjoyed your video as very informative in the use of the Mac ignition tester. Lou
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sine the creator hit you with some ad nonsense,yes you can connect to plug and run car without mifiring. thats what i do usually so the cars running on all cylinders then i open gap on tester till it ant jump then i close the gap till it an jump again then i compare each coil this way. sometimes i run the car,sometime i just crank it and somtimes i hook tester to ground instead of the spark plug but i think whats most important is making a large gap and comparing each coil to see how far they can jump and compare.if you have a weak coil it will be obvious.
The link one in the price range is in the video description...we like deals and options too...😁 We love sharing comments like this with Shane. Thanks for sharing and the added value to our wrenching community. Keep them coming. Join the channel. Best $1.99 you'll spend to access all 800 vids and Shane Daily! Smash the sub and like please. Throw Shane a high five donation, channel membership or merch for saving you $$$$$$$ Links below to support more for this work! 🙏 You rock for commenting! We will let Shane know! Want even more? Best $2 you'll ever spend...Join this channel to get access to perks: th-cam.com/channels/BhM8DCKnT3qXwTW0eToyCg.htmljoin -Daily MEMBER FIRST COMMENTS ANSWERED FIRST -Live Q/A video chats -Wonder if we have a video on your need? Members can request content links! -Full Access to the ENTIRE 700 video library -Member-Only FREE tool giveaways Ways to support or high five How 2 Wrench! Thank you in advance. YOU MOTIVATE US TO DO MORE! 1. Smash the subscribe button (thank if already a sub!) 2. Have you seen our "TH-cam Trained Support Shirts? goodfellasmerch.com/collections/how-2-wrench/products/support-shirt 3. High five donation: www.paypal.me/how2wrench 4. Got an emergency and your head is about to explode from frustration or fear? Get Shane’s cell here: how2wrench.com/ols/products/techline-one-on-one
Hey there wiggybends...We normally only share links to other better videos for members (join for the best $2 bucks you'll ever spend) but since this is safety-related and Shane is passionate about it, check out this updated spark testing video! th-cam.com/video/h5B0GSY9Ps0/w-d-xo.html We did this tool review for free for @sparkplugtestingkit6696 because we have seen many more than a few fires over the years. While the older style tools work with following all cautions, this new one is sooooooooo safe! Enjoy and welcome to our community! We love sharing comments like this with Shane. Thanks for sharing and the added value to our wrenching community. Keep them coming. Join the channel. Best $1.99 you'll spend to access all 800 vids and Shane Daily! Smash the sub and like please. Throw Shane a high five donation, channel membership or merch for saving you $$$$$$$ Links below to support more for this work! 🙏 You rock for commenting! We will let Shane know! Want even more? Best $2 you'll ever spend...Join this channel to get access to perks: th-cam.com/channels/BhM8DCKnT3qXwTW0eToyCg.htmljoin -Daily MEMBER FIRST COMMENTS ANSWERED FIRST -Live Q/A video chats -Wonder if we have a video on your need? Members can request content links! -Full Access to the ENTIRE 700 video library -Member-Only FREE tool giveaways Ways to support or high five How 2 Wrench! Thank you in advance. YOU MOTIVATE US TO DO MORE! 1. Smash the subscribe button (thank if already a sub!) 2. Have you seen our "TH-cam Trained Support Shirts? goodfellasmerch.com/collections/how-2-wrench/products/support-shirt 3. High five donation: www.paypal.me/how2wrench 4. Got an emergency and your head is about to explode from frustration or fear? Get Shane’s cell here: how2wrench.com/ols/products/techline-one-on-one
These “types” of spark testers are all over the internet. The reason we invented our “Spark Plug Testing Kit”, was because these “types” of spark testers can give a false positive. It happened to us on a chainsaw that wouldn’t start! These “types” of testers can still light up with a weak spark not strong enough to start an engine. Leading you to believe the fault lies elsewhere. You can find independent videos on TH-cam to verify this fact! U.S Patent No. 10,113,527 - A Spark Plug Testing Kit
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The S E means small engine on that tester and good fire should jump that gap. These are great...unless you are working outside in the sun...then you may need to work at night....
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Today I just had an incident where cylinder 4 on my tractor was not firing, but my inline spark tester said I was getting spark there. So I threw on a glove, and unplugged the #4 cylinder spark plug wire, and the sound didn’t change. Pulled the plug out and tested the spark plug with my volt meter, and found continuity between the positive electrode and the threads of the spark plug. Put a new plug in, and we were good to go. So I got a false reading from my inline test light.
Elecrtricity was flowing through the tester so it is normal it should light up! You need to test spark plugs as well too! But nice catch and intresting lesson for everyone
Here is a funny a Uncle of mine told me years ago he grew up in a very Rural Louisianna in the 1950s and 60s and they had a neighborhood Bully that harassed everyone one day they convinced that kid that if he Urinated on the sparkmPlu it would shut the Lawnmower off when the kid did it he rolled around in the dirt and his Urine puddle holding his Junk and Screaming with his pants down it hurts it hurts my Uncle and his Buddies just all laughed as they knew they got the kid good I’ve been a Gear Head most of my life and like most I’ve been hit with a coil or Spark Plug shock a few times it’s high Voltage but low Amperage so it just makes you jump very quickly but doesn’t have what it takes to kill you although who knows if you have a bad heart or a Pacemaker maybe it could ? I’ve also owned many boats in my life and got hit wit that Voltage down in the bridges working on a engine
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All that you are testing is the coil not the spark plug or the spark plug under pressure. You still don't know what what the spark looks like at the spark plug.
Shane At the risk of sounding like an idiot. Testing with the enclosed spark tester is checking spark that is still not under compression, right? You are checking that the coil is producing spark to the tester only, as far as I can tell. I have a few different testers for spark and can't think of any that can tell if there is spark under compression. Other than expensive scan tools.
No Worries Tom. You are correct in that is not under compression but the good news is there is an affordable tool that will do it. Shane has a full video on it. Join the channel or donate a "high five thank you" and we will share the links as a member perk! Details below: Thank you for commenting. Want more benefits? -Live Live chats -Video request links -Full Access to the ENTIRE 700 video library -Member-Only FREE tool giveaways Join this channel to get access to perks: th-cam.com/channels/BhM8DCKnT3qXwTW0eToyCg.htmljoin Just want to say thanks quick to support us for this information and our work saving you money? Give us a high 5 here: www.paypal.me/how2wrench
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Removing a spark plug and exposing a live spark can be extremely life-threatening even fatal... Norvelt Golf Course, Pennsylvania (USA) - worker killed repairing a golf cart that wouldn't start by removing spark plug from engine and unsafely exposing a live spark when testing for spark. www.osha.gov/pls/imis/establishment.inspection_detail?id=107382764 Idaho (USA) - 12yo boy airlifted to hospital with burns to 45% of his body. After helping his dad to repair a lawnmower which wouldn't start. www.idahostatesman.com/news/local/article164363622.html Jet Ski incident in Missouri (USA) - man airlifted to hospital with 2nd degree burns. www.autoinjury.com/Blog/2012/May/Jet-Ski-Explosion-Swimmer-Electrocution-Among-La.aspx Mississippi (USA) - 11yo boy helping his Grandpa test for spark on a garden tiller, airlifted to hospital with 2nd degree burns. chronicle.augusta.com/metro-latest-news-health/2012-04-20/super-bowl-champ-visits-young-fan-joseph-m-still-burn-center Georgia (USA) - a mechanic was working on the carburetor of a 1979 Ericson sailboat when gasoline caught a spark from a sparkplug and ignited, causing second-degree burns to the man’s arms and legs, Hall County Fire Marshal Scott Cagle said. The man was taken to Northeast Georgia Medical Center by a relative, and was airlifted to the Grady Burn Center in Atlanta. www.gainesvilletimes.com/news/man-receives-2nd-degree-burns-after-boat-catches-on-fire/ New Hampshire (USA) - The Marine Patrol’s Crystal McLain said that David Ross, 44, of Medford, Mass. was attempting to fix an engine problem when the explosion occurred. Ross opened the engine compartment and pulled out a spark plug, then cranked the engine to clear excess fuel, when gas fumes triggered the explosion. Ross and a 13-year-old boy suffered second degree burns to their faces and torsos. Both were treated at Memorial Hospital and released. www.ossipeelake.org/news/2006/06/three-boaters-injured-in-two-accidents/ Arizona (USA) - man was working on the right side of ski at the shoreline & had just removed some spark plugs to check this part of the motor when the engine suddenly exploded on him, knocking him back about 20 ft into the water. Luckily, he did not lose consciousness & was able to swim back to shore to grab the emergency fire extinguisher from our jetski to try & put the fire out. www.linkedin.com/pulse/jetski-explosion-replacement-jessie-sheltra/ (USA) - you want to put a plug on the end of a spark plug wire then hold it against the block while someone else cranks it. I have a friend with 2nd degree burns on his face while doing that. www.focusfanatics.com/forum/general-technical-chat/207847-not-focus-but-civic-wont-start.html#/forums/57 South Africa (CARforums.co.za) "Pull the plug out the motor, earth it on the head and pull the starter" "We tried that once, landed me with leg full of second degree burns" www.carforums.co.za/viewtopic.php?f=3&t=31220 Australia - local government Penrith City Council - workplace incident testing a spark plug for spark on a leaf blower resulted in an explosion and hospitalization of a council mechanic with second-degree burns to face and harm.
The Gap setting is for checking how good the Coil is the numbers are foe KV ( Killer Volts ) the lower the number the weaker the coil, a good coil should read 30, to 40,000 KV it's a good tester to see how good the coil is.
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Love these videos, Shane.
The gap will be different if you keep the plug inline, since in that situation you are jumping across two gaps. Voltage drop across the spark plug (in series) should result in lower voltage drop across the tester. I really like that style of tester because you don't need to remove the plug, so you get the test done in half the time.
FYI - Mac doesn't make this tool its relabeled from Lisle. A lot of of tools are just relabels. Lisle 20700.
On the last tester, open spark one…the SE means small engine. The 20,30,40 is on kilovolts…most cars are 20-30….some ecoils in some modern cars are 30-60. Set the tip to the number.
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On some of these testers they are marked in KV (Kilovolts), 10, 20, 30,40 etc. as you adjust the gap.
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I wish these things came with a proper scale. The markings are not quite in kV as you see on all these videos and websites. A 10 mm air gap in dry air between tips is about 30kV, increasing almost linearly. But it varies with humidity. At about 60% relative humidity, it is only 8 kV per 10 mm. If your compression ratio is 10:1 that means if your spark jumps 10 mm on the tool, it can jump about 1 mm of plug gap under compression, or more likely 0.8 mm because of the fuel vapour. I hope this comes in handy for people testing coils and remember to keep your hands clear because the sparks are pulsed and high voltage. Also check the zero on your tool.
Thanks. I tell our customers all the time the plug on the engine is not a valid way to check for spark. Looks like you've got a great program.
Shane, I love these videos but it is not really the compression that would prevent spark but the density of the fuel/air mixture caused by the compression that would prevent a weak ignition system from being able to spark across the gap. The thing to think about is as you compress a fuel/air mixture you increase the density of the medium so it takes a greater amount of energy to spark across the gap.
The compression increases the density,
Novice here. Can I attach the spark tester as you indicated but grounded to spark plug and actually run the motor ie outboard to determine spark and also increase gap as want to ensure all ignition coils on outboard are at full strength. Thank you and enjoyed your video as very informative in the use of the Mac ignition tester.
Lou
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sine the creator hit you with some ad nonsense,yes you can connect to plug and run car without mifiring. thats what i do usually so the cars running on all cylinders then i open gap on tester till it ant jump then i close the gap till it an jump again then i compare each coil this way. sometimes i run the car,sometime i just crank it and somtimes i hook tester to ground instead of the spark plug but i think whats most important is making a large gap and comparing each coil to see how far they can jump and compare.if you have a weak coil it will be obvious.
You could have got that same adjustable spark tester from advance auto for $15... Great video
The link one in the price range is in the video description...we like deals and options too...😁
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I looked up the part number and can't find it, has it been discontinued? Thanks
+Joe Wiess
Feel free to call our Mac Rep @ 712-541-1099 His name is Scott. Just reference the video.
Our latest tester that replaced everything we use is from @spark plug testing kit th-cam.com/video/h5B0GSY9Ps0/w-d-xo.html
Good vid
Hey there wiggybends...We normally only share links to other better videos for members (join for the best $2 bucks you'll ever spend) but since this is safety-related and Shane is passionate about it, check out this updated spark testing video! th-cam.com/video/h5B0GSY9Ps0/w-d-xo.html
We did this tool review for free for @sparkplugtestingkit6696 because we have seen many more than a few fires over the years. While the older style tools work with following all cautions, this new one is sooooooooo safe! Enjoy and welcome to our community!
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These “types” of spark testers are all over the internet. The reason we invented our “Spark Plug Testing Kit”, was because these “types” of spark testers can give a false positive. It happened to us on a chainsaw that wouldn’t start! These “types” of testers can still light up with a weak spark not strong enough to start an engine. Leading you to believe the fault lies elsewhere. You can find independent videos on TH-cam to verify this fact! U.S Patent No. 10,113,527 - A Spark Plug Testing Kit
Very interested in testing your product. If you would like us to review it and create a video, please reach out. I LOVE companies with products around safety!
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Shane Conley thanks will take a look and email you. Be in touch shortly 👍
The S E means small engine on that tester and good fire should jump that gap. These are great...unless you are working outside in the sun...then you may need to work at night....
Nice add Mark....did you see the new tool we actually use now to prevent any accidental fires? @spark plug testing kit th-cam.com/video/h5B0GSY9Ps0/w-d-xo.html
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Today I just had an incident where cylinder 4 on my tractor was not firing, but my inline spark tester said I was getting spark there. So I threw on a glove, and unplugged the #4 cylinder spark plug wire, and the sound didn’t change. Pulled the plug out and tested the spark plug with my volt meter, and found continuity between the positive electrode and the threads of the spark plug. Put a new plug in, and we were good to go. So I got a false reading from my inline test light.
Elecrtricity was flowing through the tester so it is normal it should light up! You need to test spark plugs as well too! But nice catch and intresting lesson for everyone
Here is a funny a Uncle of mine told me years ago he grew up in a very Rural Louisianna in the 1950s and 60s and they had a neighborhood Bully that harassed everyone one day they convinced that kid that if he Urinated on the sparkmPlu it would shut the Lawnmower off when the kid did it he rolled around in the dirt and his Urine puddle holding his Junk and Screaming with his pants down it hurts it hurts my Uncle and his Buddies just all laughed as they knew they got the kid good I’ve been a Gear Head most of my life and like most I’ve been hit with a coil or Spark Plug shock a few times it’s high Voltage but low Amperage so it just makes you jump very quickly but doesn’t have what it takes to kill you although who knows if you have a bad heart or a Pacemaker maybe it could ? I’ve also owned many boats in my life and got hit wit that Voltage down in the bridges working on a engine
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All that you are testing is the coil not the spark plug or the spark plug under pressure. You still don't know what what the spark looks like at the spark plug.
My thoughts exactly!
Shane
At the risk of sounding like an idiot. Testing with the enclosed spark tester is checking spark that is still not under compression, right?
You are checking that the coil is producing spark to the tester only, as far as I can tell. I have a few different testers for spark and can't think of any that can tell if there is spark under compression. Other than expensive scan tools.
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Says open spark is dangerous....says Matco tester is great 'cause you can adjust the open spark even wider. LMAO
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Removing a spark plug and exposing a live spark can be extremely life-threatening even fatal...
Norvelt Golf Course, Pennsylvania (USA) - worker killed repairing a golf cart that wouldn't start by removing spark plug from engine and unsafely exposing a live spark when testing for spark.
www.osha.gov/pls/imis/establishment.inspection_detail?id=107382764
Idaho (USA) - 12yo boy airlifted to hospital with burns to 45% of his body. After helping his dad to repair a lawnmower which wouldn't start.
www.idahostatesman.com/news/local/article164363622.html
Jet Ski incident in Missouri (USA) - man airlifted to hospital with 2nd degree burns.
www.autoinjury.com/Blog/2012/May/Jet-Ski-Explosion-Swimmer-Electrocution-Among-La.aspx
Mississippi (USA) - 11yo boy helping his Grandpa test for spark on a garden tiller, airlifted to hospital with 2nd degree burns.
chronicle.augusta.com/metro-latest-news-health/2012-04-20/super-bowl-champ-visits-young-fan-joseph-m-still-burn-center
Georgia (USA) - a mechanic was working on the carburetor of a 1979 Ericson sailboat when gasoline caught a spark from a sparkplug and ignited, causing second-degree burns to the man’s arms and legs, Hall County Fire Marshal Scott Cagle said.
The man was taken to Northeast Georgia Medical Center by a relative, and was airlifted to the Grady Burn Center in Atlanta.
www.gainesvilletimes.com/news/man-receives-2nd-degree-burns-after-boat-catches-on-fire/
New Hampshire (USA) - The Marine Patrol’s Crystal McLain said that David Ross, 44, of Medford, Mass. was attempting to fix an engine problem when the explosion occurred. Ross opened the engine compartment and pulled out a spark plug, then cranked the engine to clear excess fuel, when gas fumes triggered the explosion.
Ross and a 13-year-old boy suffered second degree burns to their faces and torsos. Both were treated at Memorial Hospital and released.
www.ossipeelake.org/news/2006/06/three-boaters-injured-in-two-accidents/
Arizona (USA) - man was working on the right side of ski at the shoreline & had just removed some spark plugs to check this part of the motor when the engine suddenly exploded on him, knocking him back about 20 ft into the water. Luckily, he did not lose consciousness & was able to swim back to shore to grab the emergency fire extinguisher from our jetski to try & put the fire out.
www.linkedin.com/pulse/jetski-explosion-replacement-jessie-sheltra/
(USA) - you want to put a plug on the end of a spark plug wire then hold it against the block while someone else cranks it. I have a friend with 2nd degree burns on his face while doing that.
www.focusfanatics.com/forum/general-technical-chat/207847-not-focus-but-civic-wont-start.html#/forums/57
South Africa (CARforums.co.za)
"Pull the plug out the motor, earth it on the head and pull the starter"
"We tried that once, landed me with leg full of second degree burns"
www.carforums.co.za/viewtopic.php?f=3&t=31220
Australia - local government Penrith City Council - workplace incident testing a spark plug for spark on a leaf blower resulted in an explosion and hospitalization of a council mechanic with second-degree burns to face and harm.