DON'T turn it over Darren, (The engine) it probably hasn't been stored properly so the Glow fuel residue will have thickened up and the chances are, the ball bearings on the crankshaft may need replacing anyway, the piston could also be stuck in the bore. If you're going to let someone else refurb it for you, pack carefully and send it off, if you're going to DIY, immerse it for a few days in a container of Diesel (Full size) fuel.
Make sure you have the correct shape and size screwdrivers etc. before attempting to strip it down and work from the top downwards. Don't try to remove the glowplug until the head is off and give the head another soaking allowing the oil to get to both sides of the plug before trying to unscrew it, - saves a new head by stripping the threads.
Regards Ian.
Good ole Sea Scout, the area inside the engine compartment may be oil soaked.