Office of Steam Logo_1

Author Topic: M91 Question  (Read 818 times)

  • Jr. Member
  • **
  • Posts: 277
Re: M91 Question
« on: January 03, 2021, 05:34:07 pm »
Nice when they run well. 
Good idea on fully venting the crankcase when in operation. I hadn’t thought of it, but otherwise it’s gonna “breathe” blow-by around the main bearings.