Re: New 15 Yahama Oil mixture
My Dad had a 1989 Yamaha for 15 years that said run 100:1, we always ran it at about 80:1 and never had any problems. That motor always ran great and started with half a pull. We used the motor mostly for trolling and only ran wide open to our fishing spots.
I would say run it at 80:1 unless you plan on running wide open all the time. That motor was a great motor though. I bought a newer 50HP Johnson and comparing the 2 motors I would take a Yamaha in a second.
My Dad actually just a bought a 2008 6HP Yamaha and he plans on running around 80:1 after break in.
But like said above I doubt running it at 50:1 will do any harm if you feel more comfortable with that. I troll with my Johnson 2 stroke all day and never have problems with plugs fouling.
