sparkplug number

skeeter11 · Jan 17, 2012

Trying to find out what ngk plugs will fit this motor, 225 Mariner serial # og529717. Always greatful for the info.

Fun Times · Jan 18, 2012

skeeter11 said:
trying to find out what ngk plugs will fit this motor, 225 mariner serial # og529717. Always greatful for the info.

Google Merc part number 33-941 = CHAMPION, SP# QL77CC, $8.83 ea, or see # 8,
http://www.mercruiserparts.com/Show...sc=ELECTRICAL+COMPONENTS(S/N-0G303046+AND+UP)

Here's all your parts for you.

http://www.mercruiserparts.com/selectDocs.asp?doc_nbr=809170+95

OEM service manual part number 90-822900R3.

Spark plug gap is going to be 0.035 in. (0.89mm)