Tohatsu M90A - anyone using alternative plugs?

[nigelr]

My low speed usage patterns tend to foul my NGK B8HS-10 plugs.
Thinking of going one step hotter, and trying Champion M821 L77JC4's.
Anyone using anything other than the B8HS-10's?
Cheers.

 

[pvanv]

You could try NGK B7HS plugs (the -10 is irrelevant), but be warned that if you go too hot, you can burn a piston, especially at high speeds. Monitor plug conditions frequently if experimenting.

 

[tohatsu_guru]

Rather than going with the peon plugs I would go to a lower ash content oil.

 

[nigelr]

Thank you gentlemen for your kind replies.
I will try a better quality oil first, and if I decide to change the plug grade, I'll keep a very close eye on them.
I enjoy just cruising along, and conditions and speed limits generally keep me below about 4200rpm.
I'm on the plane at about 3100 or so, and am quite happy operating between these revs, my usage is pretty much 100% recreational fisher.
Currently I'm using Chevron TCW3; we don't have quite the options here in Australia that you guys have as far as product range goes, but I might give the Sierra TCW3 a go, the dealer was quite keen on it. Have read good reports for Quicksilver XD50 used in this application also.
Again, many thanks and much appreciated.