I am looking for suggestions as to what I have overlooked.

I took my new Hangar 9 Spitfire Mark II to the field today to run in the new Satio 100 four stroke and had nothint but problems.

I have mounted the engine (inverted) and fuel tank as specified in the manual. When I filled the tank I had fuek running out of the muffler and the carbuerator. I blamed it on the fact that the fuel feed line is above the carbuerator. Needles to say trying to run the engine was a problem. It was, blow the fuel out try to start the engine, retighten the prop after numerous back fires because oof the excessive fuel. When the engine started it ran fairly well but would quit when the glow ignitor was removed. I checked the original glow plug and it looked like new.

It feels like myself and several or my collegues woh were working on it have missed something. I am open to any suggestions as to what I am doing wrong. I am running the engine in the plane and not on a test stand.

Help

Darn, I had the same set up and had zero problems! In fact I would start the Saito by spinning the spinner backwards! Plane flew great by the way.

You may want to take the fuel line and run it higher than the tank, then down to the carb.

I had the same trouble with a Saito 100 in my "Hype" with what seemed like gallons of fuel pouring from the engine on start-up.
I now only connect the tube to the carb just before starting (no cowel due to a change of engine type).
Sadly, my solution will not help your cowled Spit.
With the previous engine (OS FS90) with the carb at the same height, the problem did not occur so it must be this particular engine being susceptible to flooding that is the cause.

I agree with Tailskid. It's a quick easy way to test it.

Are you running two or three lines from the tank?

you have to get the tank lower or you will always have problems. you said the engine back fired that is a sign you had the engine to lean. you can,t lean a four stroke out like a two stroke