Re: Evinrude Big Twin 40 HP fouling one plug only
Making progress. All these old motors have their own unique way they like to be started. Mine likes lots of throttle upon start up, but then idles right down. Good luck. Keep us posted!
Considering how every Big Twin seems to have a character of it's own when it comes to starting and it's transition to high circuit in the carb, I've decided to experiment with different fuel mixtures this weekend.
We have a 6 gallon tank which is mixed at 12-1 with 33% of the oil being Marvel Mystery Oil. We've been using it for a couple of months to wake up long sleeping Big Twins and Elgins. All seemed to benefit from it as the longer they were hooked up the better they acted, at the expense of out eyes around the test barrels.
Another 6 gallon tank starting today will have a 32-1 Klotz Mixture, a smokeless synthetic oil. I'm wanting to document how much the carb adjustment, Idle, and high needles change.
and naturally how the character of the starting and idling manners change. I will start a new thread on it if anyone thinks it might be of interest, although I still haven't figured out the correct link in order to start a new thread yet.