We have all tried to put the wrong screw in the wrong hole at some stage .
I have purchased 2 new motors in the last 6 months and both ( different brands ) stated the bolt type to be used and the bolt hole depth .
I know it can be boring but it is always good to read the manual/specs before fitting a new part .
Maj_Overdrive gave some good advice on choosing the right bolt length , I also like as much bolt in the hole as possible .
Anyone got any other tips to stop this happening again ???