First post to here goes... I have a Ransomes Marquis 18 with a Vlilliers F12 sloper engine with an Amal 379 carb. The engine appears to be running too rich as there is a lot of black soot coming from the exhaust, to the point that when it runs past a fence it leaves a black stripe across it. As I said I would've thought its running rich but there appears to be no way of tuning it as there is only one notch for the clip on the float to locate.
If anyone can help me with this that would be much appreciated.
I am also on the look out for some new gaskets as I have a leak from behind the valve chest cover a point in the right direction would be great!