Why does valve lash not have to be adjusted on small 4-cylinder engines, like it does in motorcycle engines?

. . . like those in lawn mowers, garden tractors, snow blowers, etc.

Comments

2 Responses to “Why does valve lash not have to be adjusted on small 4-cylinder engines, like it does in motorcycle engines?”
  1. renpen says:
    June 23, 2009 at 4:16 pm

    You do adjust the valves on small engines. Where did you get the idea that you don't? On the smaller flat head briggs engines the adjustment was done by shortening the length of the valve stem. On the newer overhead valve engines they are adjusted the same way you do on any other engine. Any owner's manual for a mower or tractor will give the schedule for valve adjustment.

  2. William B says:
    June 23, 2009 at 4:16 pm

    due to the rpm that's a 4 cycle small engine
    they only run at 3600 rpm unlike a car or motorcycle engine


 
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