Chuck wrote:
I have a Merc 60 Bigfoot, 3-cyl outboard fitted with NGK BP8H-N-10
plugs. I think my plugs look too "wet" much like the third one shown in
the photo on the NGK website.
http://www.ngksparkplugs.com/techinf...200&country=US


Although the motor runs pretty smoothly. I running with a 130 degree
thermostat. What should I look at adjusting?

Chuck
This reminds me to give mine a check while we are at it. But before I
do, I am curious to know if anyone ever bothers to clean em, and if so,
with what, or do you always replace? I had always just replaced them. My
thinking is compared to an engine rebuild or replacement, the investment
is worth it in my mind. The engine in question in this case is a 2004
Yamaha 300 HPDI.