I've got a new OS .46AX motor. Only has 6 flights on it, including today's.

Anyway, when I went to start it today, as I applied the starter to the spinner, fuel came spewing out of the carb. One guy was helping me and it shot up into his eye. He was fine. But, it was like I had litterally submerged the motor in fuel before starting it. We had to tilt the plane back to let some fuel drain from the muffler, and then we took the glow plug out and spun the prop. A bunch of fuel came spewing out the spark plug hole. It soon looked normal. We reinstalled the glow plug and it cranked right up and ran like a champ.

During the fueling, I overfilled the tank just a bit, but the extra should flow right out the muffler.

What caused that?

Do you use a third "fueling" line, or do you remove the one from the carb? If your using a seperate line, then if you overfill it will not only spew out the muffler line, but also the carb line loading it up... Also you may want to check your exhaust line and make sure it's not pinched or constricted in some way.

It will fill the carb/engine before it runs out of the muffler unless the engine is mounted sideways..

Yeah, you flooded it. It will happen if you tip the plane on its nose as well.

If you had that much fuel in your carb, I'm guessing you either tipped the plane foward for awhile, or you have the fuel tank a little too high above the carb. I have a couple of planes that have the tank a little high above the carb, and they will flood if you let them sit a few minutes with a full tank...

Well, its an LT-40, I would imagine that the fuel tank location was built with this in mind. This is an interesting thing, though, because today was the first time that I fueled it and let it sit for 20 min or so before I flew it. In the past, I fueled just before flying. I'll have to try it both ways next time to see if that is a factor.

If your engine is mounted upright, you should take the pressure line off the muffler before fueling. If you don't, fuel will fill the muffler, and if the piston is down, fuel can fill the crankcase. As you have seen, you can get rid of the fuel.

I have seen connecting rods bent by people using a starter on a flooded engine that got a hydraulic lock so be careful.

"A bunch of fuel came spewing out the spark plug hole."
Bryris, I assume you mean the carb. If it came out of the glow plug area you need to tighten it down a little more.

No, I mean the spark plug hole. This was a way of getting over the hydrolock. We removed the sparkplug and cranked the prop. Fuel came spewing out of the sparkplug hole. When it was clear, we went ahead and reinstalled the plug and all was well.

I guess one sure way of testing for hydrolock is to spin the prop by hand (without glow plug battery) first to make sure the chamber isnt full of fuel.

You mean the "glow plug" and "glow plug hole" right?

Re-read Ed Moorman's post. You need to remove the fuel line from the muffler before you fill the tank. That way, you know the moment the tank is full. Leaving the line on the muffler can fill the engine with fuel before it comes out the muffler, which is probably what happened.
Dennis-

Yeah, what thy have stated above is very true. You may think i am an idiot for saying this but oh well. here is the procedure i use for fueling.
1. Take the line of the muffler and put it under the muffler where it wont shot at me or someone else or the motor.
2. Hook up my fuel pump to the jug of fuel, and then to the carb line (i dont have a third line for filling)
3. Pump until fuel comes out of the muffler line. Then after it does, Pump back about 2 cranks

This should be the way to do it. And it work right. If its not someone inform me but it works for me

DBCherry.....glow plug, that's what I meant.

NewtoRc,

If that works well for you then keep doing it. I see nothing wrong with your procedure.

thanks bubba, I was makin sure i wasnt doing something wrong. I got a question though, today i ranmy engine and jsut taxied around for a while to get my engine to go and when i did, it sucked because after about 5 cut offs of the engine, the engine locked up kinda. like it would start backwards but not fore, i dunno what happened but is that normal?

It sounds as though it may be a little lean. Taxiing around will not get good airflow over the engine and a lean condition will cause it to cut out

Now overly rich will do the same thing.

Can you be a little more specific:

What is the engine,
How many turns out on the needle valve is it spitting fuel out the exhaust
Does it idle for a few seconds then slowly die
Does it idle a few seconds then pick up a little rpms and die
When taxiing around did you notice it start to burble and die or did it rev up a little and die

and anything else you can think of

I disconect the fuel line from the muffler, and then hook it to a small fuel tank (3 oz.) That way the small tank catches the fuel. At 10 to 15 dollars a gallon I figure every little bit helps.

Yo, Newbto,

No worries on your engine running backwards. You are one of the fortunate few that got an engine with reverse!!!

But seriously, I suspect you are rich on the low end causing it to loadup. Might try lean it out a bit.Starting backwards mostly is a sign of over prime. It also happens more when an engine is new. If you are using a chicken stick, try flipping it backwards when you start it. Sometime that'll work.

Thanks for the replies guys.
I am always scared that i will run it too lean and fry the engine so i dont like to run it lean.

to answer bubbas questions....
What is the engine,
OS .40 LA
How many turns out on the needle valve
2.5
is it spitting fuel out the exhaust
A little bit
Does it idle for a few seconds then slowly die
It does a little bit
Does it idle a few seconds then pick up a little rpms and die
sometimes
When taxiing around did you notice it start to burble and die or did it rev up a little and die
It wasnt very consistent, but it was about 40 outside so it could have been the temp, I dunno though....

I would say it si a little to rich, spitting raw fuel out the exhaust is a good sign of that

ok bubba, but i got a question how do i know when it is set right?

Give it full throttle (while holding onto it), then lift the nose into the air, at least 45 degrees. If it's set too lean the engine will either just die, or it will speed up and then die.

What you want is for the engine to pick up some rpm's when you raise the nose, but continue running at those higher rpm's. When you lower the nose again, the rpm's should drop back to the original setting.
Dennis-

ok thanks DB, I will do that today.