According to Champion, the correct gap varies depending upon the application. Most applications show an OEM gap of .025" but a few had an OEM gap of .030". I would set it slightly on the wide side of .025", and it will be good enough.
This part number is for a Champion RDJ7Y spark plug. Set gap at 0.025" I bought a replacement plug, DJ7Y, at Home Depot on 10/6/13 for $2.38 + tax. The DJ7Y replaces the RDJ7Y. This plug is used for other tools such as my Ryobi trimmer and McCulloch chain saw.
GAP .030"
The L76V is a surface gap plug. There is no measurable gap.
Champion spark plug RJ19LM is for lawn mowers or similar equipment. The standard gap is .030 inches or 0.76mm.
the spark plug gap is 0.7 to 0.8 for champion plugs
spark plug gap of 0.7 to 0.8 mm for champion spark plugs rc7ycc or rc9ycc
.30
.040
.30
.30
a gap of 0.7 to 0.8 for champion spark plugs
The correct spark plug is a Champion RCJ8Y.