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I’ve noticed a few of my engines like the last run of lite mikados, and the latest j3 Hudson’s with whistle smoke.  They like to spit or up chuck smoke fluid.  These are duel chambered smoke units where one half is for the stack and the other for the whistle.  You only ad fluid down the stack.  Now before you even suggest, I’ve blow down the stack, use Arrow dusters, even shop air to no joy.  No matter how little or much of fluid I add. They always spit running down the stacks.  I even tried to Re wick to no avail.

Anyone else seen this?  Anyone have a fix or a suggestion for Lionel to improve on this?

Last edited by superwarp1
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Worse, there is fluid in the smoke/ air. Being pushed creates "high pressure air".

Exiting the small hole creates an instant pressure drop, which aborbs heat from the air and "nozzle" tip both. This temp drop causes instant condensation of moisture in the air, be it water or oil or whatever.  Your air conditioning and fridge do this. A propane unit heats for pressure vs pumps.

Much like blowing from your air compressor or long runs with an air tool where the tips/exhaust ports freeze.  (or nearly too small a carburator frosts over)

Restrictions of id within pnumatic plumbing are natural moisture gathering points.

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