Please note that the PICTURE UPLOAD function is not working. The iBoats Forum Moderators are working with the system administration folks at the parent company to get the issue resolved. This happened about a year ago and here we are again. In the meantime you can post photos as links to a picture hosting site of your choice. We are sorry about the inconvenience and will advise when the issue is resolved. Thank you for your patience.
Ther is nowwhere in the NGK catalog that the two plugs are interchangeable, the are used on differant year OptiMax and differant HP OPtiMax engines but you have listed neather so it's hard to say anything but NO.
