How to Run a Motor-Boat 



WHEN starting the motor, close 

 any auxiliary air valves and hold 

 the hand over the air inlet of the 

 carburetor so as to draw in a richer mix- 

 ture, otherwise the mixture may be too 

 weak to start the motor. If the mixture 

 seems to be rich enough, the engine may 

 start off if a little lubricating oil is let 

 into the cylinder which will make the 

 compression better. Irregular firing 

 usually comes from carburetor and spark 

 troubles. Drain the carburetor and if 

 this does not seem to remedy the trouble 

 investigate the electrical apparatus. 

 Clean the spark-plug and see that the 

 gap is right; the thickness of the thumb 

 nail is a good gage. Too large a spark 

 is apt to be wiry and quickly exhausts 

 the battery. The vibrators of the coils 

 should not be set too loosely in the hopes 

 of saving current, but should be set to 

 produce a sharp, clear spark. They do 

 not need to be too tight. 



When a two-cycle motor fourcycles, 

 that is, fires on every other revolution, 

 the gas is too rich and should be cut 

 down at the needle-valve until an even 

 cycle takes hold. Weak explosions and 

 backfires through the carburetor indicate 



that the mixture is too weak and should 

 be increased. If an engine runs steadily 

 but seems weak the trouble may be in 

 loss of compression, poor lubrication, 

 poor design, or parts out of alinement, 

 carbon or clogged outlets and gas pas- 

 sages. Sudden stopping is usually due 

 to a broken electrical connection; while 

 slowing up and stopping is caused by 

 lack of gasoline or clogged feed line; 

 engine too hot or poor lubrication. Over- 

 heating of the engine is usually caused 

 by a lack of lubrication or poor circula- 

 tion of cooling water. The pump 

 should be examined and if working badly 

 should be repacked and oiled. 



Boating is about the only sport or 

 business in which there is so much 

 courtesy. A helping hand is always 

 given if need be and you always seem to 

 be expected to salute any passing boat. 



When steering in a fog without a 

 compass it is nearly impossible to main- 

 tain a straight course. Take a long line 

 with a float tied to one end and let it 

 drag over the stern. The line will drag 

 directly behind when >ou are steering a 

 straight course and will swing sideways 

 when the boat swings away. 



Prize Winners of Sam Loyd's Puzzles 



, For April 



The honor prize of $5 is awarded to: 

 John J. Furia, Hamilton Hall, Columbia 

 University, New York City. 



The ten $1 prizes are awarded to the fol- 

 lowing solvers: 



Edward Hillery, Sherrard, 111. 

 W. H. Fitzgerald, 87 6th Street, Pelham, N. Y. 

 A. M. Stimpson, 163 Hemenway Street, 



Boston, Mass. 

 William S. La Londe, Jr., 1354 Asbury 



Avenue, Evanston, 111. 

 R. T. Huntley, 1136 Center Street. Newton 



Centre, Mass. 

 A. Prescott Barker, 13 Arlington Street, 



Lynn, Mass. 

 Fred A. Tracey, 37 White Street, Mt. Holly, 



N. J. 

 L. M. Merrill, Glendale, Ohio. 

 Edward Norton, 26 Grove Street, Rockland, 



Me. 

 Francis E. Stanley, Newton, Mass. 



For May 



The honor prize of $5 is awarded to: 

 L. F. Woodruff, 22 Cherry Street, Atlanta, Ga. 



The ten $1 prizes are awarded to the fol- 

 lowing solvers: 



Fred. Ausehurtz, Oak Lawn, 111. 



Harry Pence, 2723 Euclid Avenue, Cincin- 

 nati, Ohio. 



S. V. Halsey, Lee, Mass. 



Homer Calkins, Dallas, Oregon. 



E. Elwert, Route 2, Conshohocken, Pa. 



Frederick G. Dilger, Overlook Hospital, Sum- 

 mit, N. J. 



Charles W. Zaring, Hay Island, Gananoque, 

 Ontario. Canada. 



August Kuehn, 726 Proctor Street. Port 

 Arthur, Texas. 



Wallace C. Harding, Randolph, Mass. 



O. E. Cote, 184 Harrison Street, Pawtucket, 

 R. I. 



Ihi 



