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Cleaning tip for tanked Cox engines

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Post  SuperDave on Tue Dec 06, 2011 11:53 am

When I cleaning an old Cox engine I always make sure to clean the tank vents as well as the usual items. An engine that is "gummed up" with castor will often have clogged tank vents which makes the tank difficult to fill or vent excess fuel from the overflow.

A "pretty" engine won't function well with clogged tank vents. No Crying or Very sad
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Post  nitroairplane on Tue Dec 06, 2011 12:07 pm

Good tip but also remember the engine won't even run at all if the vents are really gummed up.
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Post  microflitedude on Tue Dec 06, 2011 12:07 pm

Good advice.

I got a PeeWee a couple weeks ago, and I was told it ran great. I opened it up and the pickup tube was hardened and full of dirt, the venturi clogged, and when I put fuel in it (before opening) it all leaked out of the crankcase. Really old gasket.
Guess he ran it 30 years ago. lol!
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Post  nitroairplane on Tue Dec 06, 2011 12:14 pm

lol or maybe he went out jogging with it in his pocket Smile
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Post  SuperDave on Tue Dec 06, 2011 12:19 pm

nitroairplane wrote:Good tip but also remember the engine won't even run at all if the vents are really gummed up.

Indra:

Yes I realize that but how many "newbs" here do? I've never seen tank vent cleaning mentioned in any "trouble-shooting" guide. Have you?
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Post  nitroairplane on Tue Dec 06, 2011 12:27 pm

No but then again it is assumed that the vents are clear to fill up the tank.
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Post  SuperDave on Tue Dec 06, 2011 12:41 pm

"Assume" is a dangerous word. It combines "ass", "u" and "me".

Not much reason to "assume" anything in aviation, is there? lol!
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Post  nitroairplane on Tue Dec 06, 2011 12:47 pm

SuperDave wrote:"Assume" is a dangerous word. It combines "ass", "u" and "me".

Not much reason to "assume" anything in aviation, is there? lol!

Apart from pull back to go up Smile
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Post  dankar04 on Tue Dec 06, 2011 12:56 pm

If you are a flyer then front induction engines are much better. No reeds and leaking self contained tanks. A good TD is hard to beat if running Cox. Beam mounts are easy to make and install engine. Reedies work but more to go wrong and if they sit need to be cleaned and stored well. Many Cox engines have sat idel for a long time.
Dan Flying


Last edited by dankar04 on Tue Dec 06, 2011 12:58 pm; edited 4 times in total (Reason for editing : updated)
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Post  SuperDave on Tue Dec 06, 2011 1:00 pm



Apart from pull back to go up Smile[/quote]

Only works if you have altitude and airspeed.
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Post  Mark Boesen on Tue Dec 06, 2011 1:09 pm

...kinda like running out of altitude and ideas at the same time :^ (...
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Post  nitroairplane on Tue Dec 06, 2011 1:13 pm

SuperDave wrote:

Apart from pull back to go up Smile

Only works if you have altitude and airspeed.[/quote]

Usually Smile
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Post  SuperDave on Tue Dec 06, 2011 1:44 pm

microflitedude wrote:Good advice.

I got a PeeWee a couple weeks ago, and I was told it ran great. I opened it up and the pickup tube was hardened and full of dirt, the venturi clogged, and when I put fuel in it (before opening) it all leaked out of the crankcase. Really old gasket.
Guess he ran it 30 years ago. lol!

Well, Dude: If you sat unused for thirty years, how well would YOU perform? (nothing persoanal mind you)
Very Happy
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Post  nitroairplane on Tue Dec 06, 2011 1:51 pm

I think i would have just enough power to get to the bathroom. lol!
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Post  SuperDave on Tue Dec 06, 2011 1:59 pm

If a #1 is your need the plane's "relief tube" will do. Airplane
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Post  Ivanhoe on Tue Dec 06, 2011 2:02 pm

SuperDave wrote:"Assume" is a dangerous word. It combines "ass", "u" and "me".

Not much reason to "assume" anything in aviation, is there? lol!

Only to assume that "Anything that can conceivably go wrong, invariably will"!
(Murphy's 1st. Law)


Last edited by Ivanhoe on Tue Dec 06, 2011 2:03 pm; edited 1 time in total
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Post  nitroairplane on Tue Dec 06, 2011 2:02 pm

SuperDave wrote:If a #1 is your need the plane's "relief tube" will do. Airplane

lol! Flying
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