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

I pulled the piston/cylinder out of its bag and as I pulled the piston from cylinder it felt (not good).
  The piston had tiny brass chips all over it, so I washed it with rubbing alcohol and also swabbed the bore with the same. Applied some steam oil and it was WAY better but not amazing. The swabs felt tacky so I think the cutting fluid still in the bore had held a fair amount of brass chips. I am not complaining, I am just happy they still Make this model! I am enjoying puttering with it a great deal. Thought I would share so if anyone purchase a kit, they may know what to watch for.
  The piston is .3125 or a tick under 8mm. The portion turned round near back edge (of cylinder) is .440 dia on my kit. It could easily be bored out to 9mm or even 10mm piston if one was feeling adventurous!
  This might be a fairly simple power upgrade to a stock engine (if one has the equipment to do it properly).
  I still want the efficiency of a slide-valve engine, so I doubt I will try to bore out this unit.




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