Show 0 ANY SPARK PLUG best condition means maxis max 11 mum of efficiency with the general genera trend toward rrt hl digger er compression engines the importance of keeping the spark plus plug in the best condition cannot be over ov erem cm if tho the motorist would enjoy tile the maximum of efficient nt car operation according to an engineering bulletin which says bays A surprisingly large percentage of poor performance may be traced arid and often 0 eliminated by an examina tion 0 of f the spar i plugs which are liften responsible for engine trouble coming under the following classifications trouble classifications 1 engine hard to start misses at low ow idling lap eeds sluggish Z 2 engine loses power on tong long runs at high speed on hills or hard bard pulls conditions described above may be flue due to fouled worn out or wrong type spark plugs or to improper adjustment lust ment of spark plug gaps gapa if the plugs are anre fouled obviously they should be cleaned and if woon won out they should be replaced if f the ille gap Is too wide it should he be ad adjusted lusted to inch for average engines and inch for high compression engines the distributor contact ponts points should also be cleaned or renewed and the gap set at no les less than inch or more than inch in most cases cleaning easily done la in the case of fouled spark plugs that are comparatively new cleaning la Is easily east lydone done fill the lower part of the plug with alcohol nl cohol metal polish or equal parts ammonia and water and let it stand tor for a few seconds nub carbon frona from insulator with stiff wire or 01 small wooden peg cov ered with one thickness of cloth then wipe the plug dry clean tile the sparking points with emery cloth adjust the gaps car manufacturers recommend that spark mugs be renewed every miles because worn vorn out 0 ut plugs cannot be restored by cleaning |