how do you know if the engine is to lean

If it stalls alot at WOT, if it doesn't smoke, if its running hot (about 300 or more), or if its just absolutely running alot better then it normally does.

You will also notice detonation, or inconsistant running, while decelerating. Just like any other kind of engine, it will hesitate, and in some cases stall.

Get a temp gun and point it at the glowplug down in the cooling head. If it reads around 200-260 you should be good, but try to stay within those temps, to cool is just as bad as to hot. If you dont have one, then judt go by what the others where saying. Also if the engine is overheating (to lean) then it will start smoking/steaming. I suggest to get a temp gun.

thanks for the help i might get me one of those temp gun is there any that you recamend or will any do

and another thing to my engine lately has been hard to turn over it has guey crap in the engine also i can turn the flywheel with my finger could that be why my engine is hard to start

i probably should have started a new thead

If you don't feel much resistance when you turn the flywheel with your finger while the engine is cold is a sign of excess wear.
A hot engine will turn over easier.
As for gooey crap in the engine, that just can't be a good thing.
A bit more information would help in diagnosing that.
There will usually be some oil residue left in the engine and pipe. It likes to drool on my leg when I pick my truck up to look/work on it[X(]...[:@].

Hard to start could be just a glow plug that need to be replaced.

the gooey stuff is like real thick liquid it looks abit like spit it is slightly red

yeh thats just the oil that is in the fuel. thats normal.

Dann

well i took the car to the LHS and he gave me some team orian nitro cleaner or and some after run oil he said flush it out with that and it should get rid of it

acetone also works.

Dann

Or denatured alcohol for general cleaning.
Alcohol, a stuff bristle brush, and compressed air.

well i've cleaned most of it out and it hard to pull is it possible it is worn out it has had about 7 or 8 litres in it