Which 2 cycle oil ratio???

[lilspenny]

I would stop worrying about that. You cant pick oil ratio based on viscosity. Also be aware that two cycle oil is a mixture and once the solvent flashes inside the motor they are all much thicker.
Detergents as used in oils dont function like you think they do. They dont clean per se, rather they prevent buildup from starting in the first place.
As I told previously no two cycle oil will remove deposits. Running conditions can help as can carb tuning, but its slow process and it may never have any effect
Echo probably doesn't care about there four mix e line enough to give it a dedicated oil as the majority of their line is two stroke.

Well, when looking at the sds and a voa I just didn't see where there could be much detergent. And I know the voa won't show much, if anything... And the sds is not much help, either. Hilarious.. .I think you're probably right about Echo and the lack of an ashless oil.

 

[bwalker]

Well, when looking at the sds and a voa I just didn't see where there could be much detergent. And I know the voa won't show much, if anything... And the sds is not much help, either. Hilarious.. .I think you're probably right about Echo and the lack of an ashless oil.

FD oils have ash limits and for good reason, so you won't see much show up on a VOA. VOA are not that accurate at low levels anyways. Two cycle oils have every little additives in them, despite what guys think.
The SDS is for storage and shipping purposes. It isn't a ingredient list and it only has to list toxic materials. Some of the things on a SDS may not even be in the product.

 

[lilspenny]

Black plugs are from low load, poor carb tuning or both. Most guys cant tune a carb to save their lives! Its pretty simple to figure this stuff out.
With a 4mix I would run the thing lean to the point you started to have running issues. Its a 4 cycle so you won't burn it up.

BW that's how I always do it. I have a tach for reference but the ear works just as well for that. When I see or read of ope operators who can't perform simple mechanical tasks it makes me think they're in the wrong business. The very idea of spending hundreds of $ every month for shop labor just makes me feel like I'm going broke. I grew up in a farm equipment dealership and we also sold boats, Mercury motors, and ope. I worked on everything.