The Marine Doctor - Spark Misfire Video

09/09/10 at 14:18:36

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The Marine Doctor › THE MARINE DOCTOR'S TUTORIALS › Chronicles of TMD › Spark Misfire Video

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Spark Misfire Video (Read 1833 times)

The Marine Doctor YaBB Administrator Offline Posts: 21453 x1\|Sask\|Canada\| Gender:	Spark Misfire Video 04/02/09 at 23:03:53 Magpi sent in this video for me to diagnose the misfire of the engine. See if you can see what I saw. www.themarinedoctor.com/videos/misfire.wmv TMD
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Merc_Nut Global Moderator Offline tuN yrucreM Posts: 1811 Ontario, Canada Gender:	Re: Spark Misfire Video Reply #1 - 04/04/09 at 01:01:30 okay... I'll take a stab at it..... I believe the upper coil is arching across to the starter casing ground, causing a misfire. One new coil and she'll probably run like new.
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The Marine Doctor YaBB Administrator Offline Posts: 21453 x1\|Sask\|Canada\| Gender:	Re: Spark Misfire Video Reply #2 - 04/04/09 at 01:03:52 I will let a few others take a crack at "why" it was happening. TMD
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Ripper1 TMD's New People Offline I Love YaBB 2! Posts: 18 Canada Gender:	Re: Spark Misfire Video Reply #3 - 04/28/09 at 21:35:21 i would say the boot is damaged or there is some sort of fileings on the plug is also happens at 15 secs
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Ripper1 TMD's New People Offline I Love YaBB 2! Posts: 18 Canada Gender:	Re: Spark Misfire Video Reply #4 - 04/28/09 at 21:37:11 also looks like the boot is puffing up
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The Marine Doctor YaBB Administrator Offline Posts: 21453 x1\|Sask\|Canada\| Gender:	Re: Spark Misfire Video Reply #5 - 04/28/09 at 23:07:30 Yes, the boot was allowing the spark out to ground. Wire was replaced and engine performed as it should. TMD
Back to top	TMD's costs a considerable amount of money each year to operate. If you would like to give something back...here are a few ways. 1. Advertise with TMD's 2. Purchase TMD Key Chain Floaties, contact Merc_nut, baxter or TMD for details. 3. Donations. IP Logged

Merc_Nut Global Moderator Offline tuN yrucreM Posts: 1811 Ontario, Canada Gender:	Re: Spark Misfire Video Reply #6 - 04/29/09 at 01:44:28 Finally I see it. Man, that's hard to see in the daylight. Reminds me of the time I ran that little 9.8 at night and could see why my idle sucked as the trigger movement arched the wires to ground.
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Magpi

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Re: Spark Misfire Video
Reply #7 - 05/01/09 at 17:23:59

For educational purpose, the coil and wire were new, along with the spark plug. There was a suspicion that the spark plug boot (made in Mexico) was made with to much carbon in the rubber. This condition has happened on other motors that had a new coil of this type installed. Later observations of this problem showed that just changing the boot with an OMC replacement boot would solve the problem.

Shoot for the Moon....Even if you miss.... You'll still land in the Stars

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