Spark Plug (NGKBPR6EFS)

Mercruiser - Spark Plug - part number - 33-816336, changes to - 816336Q 3.0L 181 CID - FROM serial number OL010042 3.0LX 262 MAG/EFI/GEN+ From serial numbers - OF803800 to OL00000 4.3L EFI/GEN+ From serial numbers OL012009 4.3L GEN+ From OL010065 4.3L HEFI GEN + From serial numbers - OL010044 4.3LX GEN+ From serial numbers - OF803000 up to OL00000 4.3LXH GEN + From serial numbers - OF803000 up to OL00000 5.0L EFI/GEN+ From serial numbers - OL015751 5.0L MPI 2002+ 5.7L EFI/GEN+ From serial numbers - OL010035 5.7L GEN+ From serial numbers - OL010037 5.7LX EFI/GEN+