Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I am surprised about the throttle leaking.

I am interested how you plan on fixing it.

Doing some reading, it looks like two other Jensen 95's had very leaky valves on the steam line... Bad batch/quality control at the time these were made? As I said, this is by far the worst one I have...

This was posted by Jeff Bicht (I know mine did not come from his collection as the previous owner bought mine new)

I tried oil on the tapper of the steam valve but mine was leaking so bad it did not help what so ever as I tried this first. The condition of the steam valve on my 95G I have to tighten it so much or it will not hold pressure. Matter of fact I have to keep pushing down on the valve while it is running to help keep the pressure up do to it leaking so bad even after lapping it. I know all Jensen steam valves leaking but this is the worse I have ever seen or at least out of the 17 Jensen's I have.

And from our own John Reid

I did this on my 95G and really reduced the amount of steam that the regulator leaks, still drips a little though as that Boiler really generates the Steam.

The regulator is part of the Steam Line, there is a Stem which has a spring and a nut on one side of the Steam Line and a Handle on the other. In the area that is inside the Steam Line there is a hole that is positioned when the stem is twisted in order to allow steam to pass or not to pass on into the Steam Chest or engine.

I first removed the Steam Line from the Boiler and Engine and then removed the nut, washer, and spring, then I removed the stem from the regulator.

Then, I cleaned everything and applied a small amount of Valve Grinding Compound on the regulator, replaced the regulator and twisted the stem, around and around with pressure applied to it. Not too much though, all I was after was to make the surfaces mate better.

I then took the Stem, and the Steam Line and washed them thoroughly as one does not want abrasive getting into the engine as that would cause premature wear.

Once clean, I reassembled everything and was happy with the results. I do not think this should be repeated, it should only be done once as it does wear the surfaces down.

The compound and tools are downstairs and I am not able to go up and down anymore today, so sorry, no pictures