http://www.youtube.com/watch?v=gzbDiyhIJJM
http://www.youtube.com/watch?v=Iv2vCVNMDlg
http://www.youtube.com/watch?v=UutsTqgbrP8
http://www.youtube.com/watch?v=xlxFIrwLAs8
Here are some videos I just took of today's break in attempts. I started yesterday with a HPI R4 (med/cold) plug. And realised today that it cuts out when the glow starter is removed from the engine, so I put in a new R4 plug. Both times I used two copper washers to reduce the compression a little. The second R4 plug burnt out immediately, so I took it out tested it, and yeah, whilst all wet on the bottom part of the plug, the end of the coil was black. So this time I fitted a RB Concepts 6 plug which came with the engine (second hand) I put three washers on it this time as it is a long plug, and I think it has burnt out just as quick as the other two plugs. Now I know you are supposed to be prepared to go through plugs during break in, but immediately?!
I have a few HPI R4 plugs left, one R5 (cold) and a couple of Mccoy MC9 (long cold). But I was expecting to have these spare for a long time, am I doing something wrong to be going through them so quickly? As you can see from the videos, I have richened it up so much that any throttle floods the engine, so I later back the needles in slightly to give it a little less fuel. There is oil spitting out of the exhaust, but not too much smoke, but the needles where so far out at one point I thought I could see the o-ring of the high speed needle!!!
I'm getting very stressed with this break in, I wanted it to go smoothly, I have taken the time to reheat the engine with a hair dryer before each start, but the plugs are dying so fast I don't have chance to check temperatures as taking the glow plug heater off to do so kills the engine!