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- From: earl@trsvax.tandy.com
- Date: 26 Aug 92 08:23 CDT
- Newsgroups: rec.models.rc
- Subject: Re: FAQ? (questions about engines)
- Message-ID: <1195667303@trsvax>
- Path: sparky!uunet!usc!sol.ctr.columbia.edu!eff!news.oc.com!utacfd.uta.edu!trsvax!trsvax!earl
- Nf-ID: #R:ida.liu.se:9961:trsvax:1195667303:000:3216
- Nf-From: trsvax.tandy.com!earl Aug 26 08:23:00 1992
- References: <9961@ida.liu.se>
- Lines: 68
-
-
-
- /* ---------- "FAQ? (questions about engines)" ---------- */
- Is there any FAQ list for this group? I have a minor problem
- with a Webra 6.5cc engine. My engine doesen't run properly.
- It starts but stop again after a few secconds. I suspect that
- the glowing plug is to cold. How does an engine react when I
- use wrong glowing plug?
- Goran
- *****************************************
-
- It's hard to answer a vague question. But....
-
- If the engine's running too rich, it'll cause the glow plug to cool off
- and quit, unless the glow plug battery clip is left attached.
-
- If the engine's running too lean, it'll quit, usually, it'll overheat, sag,
- maybe surge a little, then die abruptly.
-
- If the glow plug is damaged, old, et cetera, it'll cause the engine to quit.
- Typically, a damaged plug won't keep the engine lit up properly, after you
- remove the glow plug clip, it'll slow down and die, or just die abruptly.
-
- If there is a fuel line problem, pin holes, poor fuel tank location, bad
- fuel lines, and so on; it'll cause symptoms like you mentioned.
-
- If you have a fuel problem, the engine will run off the prime, for a few
- seconds, and then die, as it can't draw fuel properly. If the needle valves
- aren't set right, it'll run lean, when you open the throttle and then die.
-
- .... checking for a bad glow plug is easy, just replace it with a new one.
- I assume your using a R/C Webra engine, so I would suggest you try a regular
- FOX R/C long plug. Unless your into high performance, tuned pipes and such, the
- FOX plugs will work good enough. The Control line plugs may or may not work well
- depending on your engine uses, etc. Everyone tends to have glow plug preferencesbut the FOX plugs have always worked well for me without problems.
-
- If you have a new engine, the initial engine runs and break in's tend to be
- extra hard on the glow plug. If the engine is running rich or flooded out a
- few times, the heavy fuel droplets cause the glow element to get damaged easily.
- If the engine runs lean for a few seconds it can cause the element to melt and
- open. During break in, minute metal particles will fly around inside the engine
- and interact with the glow plug element causing rapid failure too. Some engines
- may have left over machine residue (small metal bits and particles) inside and
- these bits can destroy a glow plug in short order too. I suggest on a new engine
- that hasin't been used yet, to remove the back plate and flush out the engine
- with denatured alcohol, and then re-oil with light machine oil and then put in
- the glow plug and install the engine, etc. Some engine's, such as FOX, are
- test run at the factory, and thus you would not have to do this flush out task.
-
-
- ***********************************************************************
-
-
- <This information is provided by an individual and is not nor should be
- construed as being provided by Radio Shack or Tandy Corp. Radio
- Shack/Tandy Corp has no obligation to support the information provided
- in any way. >
-
- Earl W. Bollinger
- @ <trsvax!earl>
-
-
- "You were in the Clone Wars!", said Luke excitedly.
- "Yes", replied Obi Wan, "I was a DOS programmer. But that was before the dark
- times, before OS2."
-
-
-
-