spark plugs fouling on 250

[Dale best]

I have a yamaha 250 outboard HPDI and I have changed 4 sets of sparkplugs this season , my local tech advised its the fuel.

[Connley Ho]

NGK huh?

I've had the same issues this year with my 91 PRO V 200...unbelievable problems!! Rough idle, sneezing, and stalls out when I put it into gear.
I changed all kinds of things...which is never a bad thing. I went through 4 set of NGK plugs (as it calls for) then the guys behind me in at the cashier pointed out that he has the same type issue with his Yamaha sled and he swapped his NGK plugs with AMERICAN MADE Champions. I just tried it and ***! My torque, my revs...my PRO V is back!
If I were you, I'd try to buy the corresponding Champion plugs...trust me, I've been there!
Connley

[Dale best]

Thanks for the info on the plugs I will see if they will cross over.