Sounds as though this is engine is not mounted inverted. If it mounted at 90 degrees (sideways) then there is no need for any special precautions. Actually this is by far the best way to mount a two stroke glow engine as far as operating goes. 1. The carb spraybar is a little lower making it easier to get the fuel tank high enough to center on the spraybar for the best fuel draw throughout a flight. The needle valve is in a safer an far easier position to adjust (straight up) and if say the muffler pressure line is left on during fueling then any overflow will simply run out the muffler and can in no way get up and into the cylinder.

If this engine is mounted with the cylinder at 135 degress with the muffler centered under the engine then getting hydralic lock is a little easier but still not a major problem. The bottom line is any engine mounted fully inverted or at 135 degrees the key is to locate the the center of the fuel tank either level or slightly below the carb spraybar. Any engine that will only start upright or inverted and is subject to excessive syphoning is just a symtom of a fuel tank that is not at the proper tank level/spraybar relationship.

With a fully inverted or 135 degree mount it is always a good idea to keep a hemostat on the feed line if it sits fully fueled in the sun because the fuel will expand. And as always never walk up to either and hit it with a starter without first a few flips by hand and no ignition. If a problem exist it will be imediately apparent.

John