super tiger 3250 help
Sicko,
The fact that the oil residue coming out of the exhaust is dark may just mean it's getting burned in the muffler. The only way to tell is to capture some on a piece of white card stock and then check for metal particles. If there's nothing but oil, then your oil's getting burned in the muffler.
If the engine runs well in the normal position, but sags when you point the model's nose up, then either the high-speed needle's too lean, there's not enough pressure to the fuel tank, or the fuel tubing's too small.
As glow engines get larger, they use more fuel, and we tend to forget that a larger fuel line may be needed. This also means that the clunk in the tank, the clunk line, and fuel fittings on the tank have to be larger. With high fuel needs, a too-small fuel line impedes fuel flow, so the engine can go lean if anything happens to slightly restrict the fuel flow. Pulling to vertical makes the engine work harder to draw fuel, so if the tubing's a bit small, the engine will go lean.
You'll have to do some careful detective work to see which is exactly the problem.