Show I THROTTLE SHOULD BE I KEPT HEPT PARTLY CLOSED I SAYS AUTO EXPERT I mixture late lato spark and running with throttle well ell open are aro all product productive e of the tho same trouble The explosion ex cx will be Le slow causing considerable considerable consider consider- able beat heat to bo be O exposed to the wearing surface tending tending- to dry ill up the oil and naturally cause cutting or of tho cylinder and piston The mixture should not be bo any uny richer than is necessary to fire tire regular and strong at all positions of th tho throttle and the spark should be kept advanced ad to such a point that the motor will ill not pound yet will run on a small throttle opening Racing should not be in indulged in if the car is expected to last very wry lou long It is not only destructive to tho the I power plant but to every er part of tho the machine To run with tho the throttle wide open as in racing the heat beat developed by Ly tho the rapid explosions and friction of the rapid moving piston also tends to evaporate orate the tho lubricating oil and causo caus the I piston to expand and grip p the cylinder walls Should it become necessary to torun torun torun run at high speed for a n time the tle tie should bo ho closed momentarily every two or throe three minutes but not enough h to cause a retarding action This re re- re duces tho the pressure on tho piston allowing allow allow- ing the oil to be bo spread afresh over o the surfaces of tho the cylinder and piston This also tends to koep keep the tho parts cool and pre prevent ent the tho piston sticking It is well to feed a little more oil when speeding |