Williams 325 - Weber MPE 750 not cranking

[gunsmoke125]

Hi All,

I am working on an overhaul project to try and restore a Williams 325 TurboJet and need some help from anyone with experience with the engine.
The engine seems to want to crank but only manages a little jolt before sticking.

The usual suspects have been eliminated
- Battery OK
- Solenoid OK

Removing the valve cover and watching as I engage the starter motor directly from a 12V supply I can see the timing chain link rotate the camshaft about half and inch before seizing. Once I disconnect the starter from the 12V supply the camshaft rotates back to the position it started in (about 1/2 inch).

I want to see if I can rotate the engine by hand, but I cannot see any obvious way to do this without removing the engine from the vessel. Does anyone have experience they can share on this kind of issue or how I could rotate the engine?

When starter motor is directly engaged the crankshaft rotates 1/2 an inch before stopping


As soon as power has been disconnected from the starter the crankshaft returns to where it was.

 

[gordmac]

Remove starter and lever it round on the flywheel teeth?

 

[Seastoke]

Use the search bar top right and look for, A Williams Jet Rib Guide , post by jrudge