There are plenty of stuff that needs to be fastened to the engine cover, P2 gauge metering, engine mounts etc etc. Here I have welded a drain coupling to the bottom of the cover so I can check that there are no internal leaks.
Here below I am in the process of welding a threaded fitting to the cover that will hold the propane preheater. I am trying out a Pyrex gas lens for the tig welder, nice to get that extra field of view of the part I am welding.
The idea in the long run is to use a small camping propane bottle strapped to the bike for preheating, but during the bench tests I will probably use the old and trusted 5kg propane tank.
I have also bought a timer module since I need to preheat the glow plug for 10-15s before the gas valve is operated, if not the gas won´t light.
Plenty of graphite lube on the threads since stainless threads have a nasty habit of fusing together.
Here you can see the preheater sticking into the engine, I will mark and drill a hole in the combustor outer liner in which the preheater tip will protrude.
Cheers!
/Anders