Here are some photos of the inside of the 12hp Marshall britannia engine. I hope you find the construction interesting.

This shows the straight firetube once the firehole and ashpan door assembly has been removed.

Looking in from the tubeplate end.

These are some phots of a Marshall Portable engine. She is a 1920's 'S' class, 6hp piston valve recently returned from Chile. She is in fabulous condition.

The external boiler is in very good condition under the original lagging and internally too she is in great shape. We are going to retube her and replace her smokebox and she'll be out on the rally field soon.

The original exterior lagging and timber was all in place. Underneath the boiler was in good condition.

Interior view of the tubeplate.

Interior view of the firebox taken with the camera through the mud hole in the tubeplate.

Stays between the box and outer wrapper.

Top of the Marshall patent firebox crown.

 Here is the smokebox all bolted up ready to rivet.