gliderx5
Joined: 30 Jun 2008 Posts: 203
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Posted: Mon Oct 20, 2008 3:54 pm Post subject: Fouled sparkplug |
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While flying my MKII 503 SCSI last night I had a plug foul. I suddenly could not maintain RPM and it was running very rough. I was close to the field at the time and just came back in. I checked the plugs out tonight and one was bridged. I replaced both plugs with new ones and the 503 is running like Swiss watch again. I think that I may have done an inadvisable thing when I tuned the Kolb this spring. I put on new wires with suppression caps, AND I used resistor plugs. I just read tonight in the CPS catalog, under maintenance tips, Part 9, page 20, that using both suppression caps and resistor together is a bad idea. I will replace my plugs with non-resistor plugs and keep a close eye on them. Also, I believe that I read somewhere that the plugs should be replaced every 25 hours. I had 30 hours on the fouled plug. Shame on me! This event also showed me the extra level of safety that a dual ignition would bring to the table. Food for thought. I still love this little airplane!
Malcolm Morrison
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