

TjRACroa 



CRANK CASE AND 

 SHAFT 



The crank case is 

 cast in one piece of a 

 special mixture of 

 semi-steel of unusual 

 strength. It is so 

 proportioned that 

 vibration will not 

 affect it. The crank 

 shaft has an inter- 

 mediate bearing or 

 pillow block, which 

 prevents vibration 

 and crystallization. 



This crank case is 

 hermetically sealed with a 

 sheet iron lid that shuts out 

 all dust. It contains ten gallons 

 of lubricating oil, which is forced 



by splash and a force pump over all bearings, as well as in the 

 cylinders and all other moving parts. This oil is in constant 

 circulation and is kept absolutely clean by passing through a wool 

 filter once every ten minutes. 



Our crank shaft is of the highest quality of steel and exceeds in 

 its composition the requirements of the United States naval speci- 

 fications. 



THE SECOR CARBURETOR 



The Secor carburetor is as simple as an anvil and has no parts 

 to wear, break or get out of order. It is carefully adjusted at the 

 factory and that adjustment is then fixed for all time. Where 

 other engines depend on daily adjustment and the constant vigilance 

 of the operator to maintain efficiency by hand 

 regulation, the Secor carburetor secures 

 uniformly good results by 

 automatic control, which is 

 not only more reliable than 

 the human hand, but also 

 much more sensitive and 

 accurate. This method 

 controls not only the in- 

 take of oil, but regulates 



The Acme 



in the Use of 



Animal Power 



