My intention is to first try to let the engine run on a glowplug (i have bought the OS 4 stroke glow plug's)
If it works then i want to try let it run on a spark plug.
Stef
Bought some 1/4-32 sparkplugs that supposedly came from China as some others were as much as Aus$40.00 each plus about the same for postage which I thought was a bit over the top.
Especially since I'm building a V8 along with another that a mate of mine is building.
Anyhow, these were around $12.00 a piece and we tried one first up just to see if they would stand up ok.
Ran all day in an atkinson engine and thought that was good enough so bought quite a few more.(30 plus)
They are the same length below the copper gasket as an OS 4 stroke plug so you will have no problem there.
What may be a concern is, if the engine is currently on fuel/oil mix and usual for this to be around 20% oil, then you may get oil up problems with the little spark plugs.
Glow plug is no problem.