1975 Evinrude 2HP Model 2502 Full Factory Service Manual, Page 28Get this manual
Figure 4- 5Ground Wire and Armature Plate Screw
Figu 4-6Ar mature Plate Removed
Figure 4- 7Bushing Boss and Groove
CLEANING, INSPECTION AND REPAIR SPARK PLUGS
Inspect plug fo racked porcelain and worn electrodes Clean the electrodes with point fileAdjust gap to the specified .030 inchIn
rgappingadjus only th round el ec trode, as atte mpting to bend th cente electrod will rack th ins ulatorSee Figure 4- 8
Poor motor performance and premature spark plug failure may esult
from improper park plug installationBefor installing the plug, be sure the plug seat in the cylinder head is clean and free from obstructionsSee Figure 4-9Install new spark plug gasket, screw the plug in by hand, then tighte to the specified 17-1 to 20-1 foot poundsIf thr eads are stripped in cylinde head, Heli- coil inserts ar availabl e
Figure 4- 8Checking Spark Plug Gap