Champion XC92yC or NGK BKR5E
UK spark plug cross reference information can be found on the instructions when purchasing a cross spark plug that works in the UK, or on websites that provide information on cross spark plugs.
Most all brand spark plug brands are on the cross reference including Champion. Some of the brands that cross reference to Champion are Autolite and Denso,
Many spark plugs can be interchangeable if they fit the motor in question. To find out which can cross reference with the Laser 40500, a cross reference catalog should be referenced.
The 8.1 is a diesel motor, no spark plugs.
Ngk bpr5es
Bpr6es
802592
Champion Spark Plug QC12YC
Champion RJ19LM
Champion rj19lm
Z9y
Bkr7e