hello all. i have an m a n 17.190 eco horsebox. and require a tool to manualy turn the flywheel for valve adjustment purposes…its an old j reg.any one got one going spare !spent all me funds on head gaskets and stretch bolts…so depleted funds cause me to beg…not many local hauliers in this neck of the woods…big hello to newport, any john evans.j b evans. aurthor bros .sheddicks.drapers and a one types all out of newport.hope all is well with everyone…big hello to dia hobday.a legend who learned me to rope and sheet back in the late 80s… 
A pry bar or long flat screwdriver was our main way of turning the engine for timing marks, if there is no way that method can be used then the starter could be removed to get at the flywheel teeth. Franky.
If you just want tappet adjustment then a socket and bar on the front pully was also the usual method.
If you can’t get a socket on the pulley I’m sure years ago we used to jack up one back wheel put in gear and turn the back wheel with a wheel brace only thing is it needs 2 of you .