RPM drop and Spark plug strength.

How to keep the Cessna 170 flying and airworthy.

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n3437d
Posts: 214
Joined: Wed Apr 24, 2002 3:48 am

RPM drop and Spark plug strength.

Post by n3437d »

This message is a follow-up to a question I previoulsy asked. After experiencing rather large RPM drop (left mag.) when doing the mag. check I jumped the the "worse case scenario" that the left magneto was going bad. I pull the plugs, clean and gap them every annual and they always looked good. After reading some replies to my query. I changed my train of thought to "why don't I replace the plugs" After looking through my engine logs I could find no reference for the plugs ever having been replaced. The fact that they looked good was good enough for me. Wrong!
Last Friday I put 12 new REM40E's in the O-300D and it was as if I did a top overhaul.
Thanks to you all for your helpful suggestions. :)
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Mike Smith
Posts: 175
Joined: Mon Jun 02, 2003 2:53 pm

Post by Mike Smith »

You're in Carson City, NV? I'm just over the hill in Grass Valley (Near Nevada City). My boys and I have flown just over the hill to Minden to watch the glider ops. Which field are you based at?

Mike Smith
1950 C-170A
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