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

Right I want you to measure the amount of movement in the eccentric from end to end .
Then remove the steam chest.
I then want you to make a card board template exactly the same as the port block/shoe
ie a square with the center square cut out.
Then place the cardboard template on the block in exactly the center over the ports
You should only see the center port .
Move cardboard to right  exactly half of your eccentric throw measurement.
Take photo then move it to the  left  your total eccentric throw  take another photo
Show us the results .
“ do not fiddle with the port slots yet “