ORIGINAL: tlojak38
Wouldnt that affect it at all times? The tubing was new when I put the engine in, so was the tank.
That wouldn't solve an existing problem and could create a new problem.
BTW: Did you put in an in-line filter?
Any small debris could partially clock the cat-eye arrangement the ST's use.
ORIGINAL: tlojak38
Bought it all brand new when I got the plane its in. I'm not sure what the eye that you're talking about is. But I bought the engine used. The guy broke it in and decided to go bigger, so he sold this to me. I can check to see if the eye is right, if you tell me what to look for.
Open the throttle up fully and look down the throttle barrel.
You will see a brass rectangle transversing the opening.
If the brass rectangle appears to be solid, the "cat eye" is facing down as it should.
That brass block should be perfectly perpendicular to the entrance.
If it looks good, loosen the carb screws and pull off the carb. Note or preferably mark the EXACT postion of the carb with a marker before you do or your throttle trims will be way off once it is re-installed.
Now that it is off, turn the carb over and you will see the "cat eye".
Open and close the barrel. As you do so you'll see what appears to be a pin, that moves into the cateye opening.
At mid throttle that pin should move to about 50-60% of the distance down the cat eye.
At full idle it should almost close all but 1-2 mm, but you will not be able to see this because of the barrel opening.
ORIGINAL: tlojak38
I think I'm stuck on the whole low pressure at w.o.t. thing because of the exhaust leak.
What do you mean by this?
Is the engine upright or inverted?
Why do you say it is leaking? Do you see smoke coming out somewhere it should not?
Is the header affixed properly to the cylinder head?
Where is it leaking from?