Originally Posted by
JohnBuckner
Yes indeed if a starter is carelessly applied to a hydralicallly locked engine the insert material will make no difference. I use nothing but silicon inserts but they are not fool proof.
John
I've been using Magnum silicon inserts, (the white one), for 14 years and haven't marked a spinner yet. Nylon, aluminium or carbon fibre.
What colour insert are you using?