Some good ideas here... I like the idea of conventional cap screws and tapered washers..but have not found any in the 5/16 size yet. It would be easy to make a tapered washer or even have custom bolts machined. I am not sure about the idea that these bolts are intended to shear off under hydrostatic lock up. I am sure that that is one situation where they might fail.There is no mention in the detailed OH manual about any such intentions.
I do have an engine which was badly smashed up inside due to oil in the lower cylinders, when it warms up I will pull it apart and check out the crank gear and related parts. Sorry, I cannot post any other photos but you will note there is a similar pattern of failure on them all. As failures go this one is certainly less traumatic then lots of other types, provided no other issues resulting from this, turn up.
Last edited by Bob Phillips; 17-12-20 at 03:12.
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