AS I said I am resurrecting an old engine. I purchased a new RCEXL twin ignition and removed and cleaned the carb. I did not have a rebuild kit that fit but I did have a new diaphragm that fit. I set the timing precisely at 27 degrees BTDC.
The needles are set at 1&1/2 turns open.
The engine will start and idle fine but I cannot get it to throttle up. I took the tank apart and checked everything. The pick up is a felt filter unit I got from a lawn mower shop. However it has sat in a drawer for maybe 6 years.. I am using the three line system.
The fuel line is 1/8 OD and 1/16 ID.
I am thinking that maybe the prop I have is too much for the engine. Its a 20x10. I don't remember what I used to use on it. I think it was a 20x8.
Any Ideas?

If everything else is fine, refusal to throttle up usually indicates a lean condition. Turn both needles out 1/2 turn more and try again. If it will then throttle up, fine tune it from there.

Note that contrary to common belief, there is no such thing as "factory settings" of the needles. They come with a setting that hopefully will allow the engine to start and run, and you MUST fine tune the engine from there.

AV8TOR

The needles on that engine are very safe located away from the prop. I tried them all over the place then went back and reset them and started over
I could get it to just about break into a clean two cycle at about 1/2 throttle by richening the needles about 1 turn. If I continued to open the throttle it would quit. I think I will go out tomorrow and let it run for awhile. Maybe it needs to be loosened up.
I do remember when I was running it before I had to carefully adjust the needles to get both cylinders up and running. It probably should have two carbs

[QUOTE=dirtybird;12096284]....
The fuel line is 1/8 OD and 1/16 ID.
I...QUOTE]

Maybe try a larger size fuel line? Good luck.

[QUOTE=spaceworm;12096537]Yes I guess I should try that.I got the tank back on the CG so it has a long way to travel. It does act like it is just not getting enough fuel.