ROUGH-AND-TUMBLE ENGINEER 85 



as on a plain engine. When you have it at the proper 

 place, tighten just enough to keep from slipping, then 

 ; your rcvese Ic n and bring 



engine to the center. If it shows the same lead for 

 you are then ready to tighten your 

 eccentrics securely, ami they should be marked as before, 

 imagine that you will have this to do often. 

 it l>e scared about it. You may run an engine 

 a long time, and never have to set a valve. I have heard 

 these windy engineers (you have seen them), say that 

 had to go and set Mr. A's or Mr. B's valve, when 

 the i e, if they did anything, it was simply to bring 



the eccentrics back to their original position. They hap- 

 pened to know that most all engines are plainly marked 

 at the factory, and all there was to do was to bring the 

 eccentrics back to these marks and fasten them, and the 

 ^ set. The slipping of the eccentrics is about the 

 only cause for a valve's working badly. You should there- 

 fore keep all grease and dirt away from these marks ; keep 

 dl tightened, and notice them frequently 

 to see that they do not slip. Should they slip a one 

 teenth part of an inch, a well educated ear can detect it in 

 Should they slip a part of a turn as they will 

 some times, the engine may stop instantly, or it may cut 

 a few peculiar circles for a minute or two. but don't get 

 excited, look to the eccentrics at once for the trouble. 



ir engine may, however, act very queerly some 



