McCulloch 45HP Elec Start amp Generator 1978

"Hello have had this motor on

"Hello have had this motor on my 14' Serf Tamer for 9 + years , it has run good always ,But my "Helpful brother" decided to change my spark plugs & threw the old ones out . now it will not idle and keeps stalling at low RPM s . If any one can help me with what the gap setting & heat Range is for the new ones. It would be extremely welcomed !! ps if any one knows where I could get a manual too , I'd owe you lots Maybe a Bottle of your choice??
ser #81525-1042 #DOT113579 M8430
thanks fro;Stranded in Alberta, Canada.
Ken Hunter . [email protected]"

"My Champion Spark plug book s

"My Champion Spark plug book says RJ12C or J4C for that engine.
"

thanks Tom I'll try the

thanks Tom I'll try the RJ12C.
PS: the numbers on the case are C3LB-1895 I know it's suppose to identify the year in that number but have no clue as to how to read it from that #