Thanks Max,
I have taken all these measurements, but, it is difficult to get others to carefully check these dimensions on their engine covers, before I visit them. It is interesting that the 11HP engine cover was TOO SMALL, but the 10.5HP engine cover was TOO BIG. You would expect it to be the other way round. So, it may have something to do with the engine age or type. I am honing in on the 25 series engines (10HP, 10.5HP, & 11HP) because they all use the same flywheel as my engine. The flywheel on the 12HP engine is very different. I will have a look at smaller engines as well.
Thanks, Ross.
