i'm currently running .056 jets in my 55 merc .the weather is starting to cool down a bit over here.i don't want to run my motor to lean and risk damaging it.
could i get away with running 98ron fuel instead of the usual 89 ron i run it on.
i took a couple pics of the plugs,i eased off from about 6200 and shut it down.
the plugs were running around 59 F (15c)air temp,the coldest i run it at is about 40 F (5c) cool dry air.
thanks.
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