Salt Lake Telegram | 1921-08-07 | Page 28 | When the Engine Misses!

When Wizen the Engine Engin Misses Knowledge of ot the spark plug Is most moat essential for tor tho the proper operation operation operation opera opera- tion of ot an nn automobile Yet this simple sim sim- simple plo little instrument has hns sent many motorists to garage garaJo men for tor help Just because the they hadn't learned Its construction construction construction con con- and function The spark plug Is 15 tho the first thing to test when the engine misses fire tire The spark gap may be too wide or orthe orthe orthe the points may touch The plug may reach too far 11 into tho the cUn cylinder er or not far enough h. h The terminal may not be bc tight There Thero ma may be bc a Il carbon de deposit deposit de- de posit on the plug inside tho the cylinder Tho porcelain ma may have cracked or moisture may have haye accumulated on tho the plug One way to detect the tho missing spark plug Is to open the relief relle cocks one at n a time while the engine I is running If It a 1 flame lame Is visible and anda a l sharp explosion is heard the cylinder cylinder I der del is working well Ifs If there la Is no flame flamo and a hiss Is heard the sparkplug spark sparkplug I plug should be taken out and exam exam- ined To test the tho spark plug place It on tho the cylinder cUnder head with wire connected connected connected con con- and switch on Crank the engine slowly If It there Is a spark at at tho the gap ap the plug is good Otherwise o the tho spark plug lug should betaken be betaken betaken I taken ap apart rt and if It It Is not cracked should be cleaned and the spark grip gap set properly I I