bls-fla said:
Everything you say is true. I could walk behind my Yamahas while running; this Johnson ruined my white vinyl fence in minutes. I let it go for a while but it didn't get better. It's not just smoke, it's spitting a lot of oil. Just thinking about it gives me a headache. I might just have to take it to someone who can actually diagnose what is happening.
I gave the Johnson a look up and confirmed that that model is still carbureted.
Your Yamahas are probably fuel injected and you really can't compare one to the other particularly in respect to the emissions. The Johnson is probably going to be rich and have a "generous" 50:1 ratio while the Yamaha will run lean and inject as much as half the oil as the older motors.
I really wouldn't sweat the Johnson running dirty. It is what it is and it still gets the job done.
I fire my older 2 smoke Suzuki at the dock and chuckle as the guys with the newer 4 strokes belly ache about the smoke. Later on the water they can't keep up and my motor broke my bank at $2,250.00.
Sure theirs gets better mpg but I figure costing some $12,000 more mines still way cheaper to run.
Can't justify the newer cleaner motor yet.
I'll bet your neighbor will run that Johnson for years to come.
Mike