wmk0002
Well-known member
One of the bolt holes where the lower unit attaches is stripped out on my Yamaha 30. The bolt is an M10x1.25 with 40mm thread length. What length helicoil insert should I look to buy for this job? I've only used one once before and it was a thu hole scenario so I didn't have any worries about breaking off the tang. I am not sure if I need a shorter insert than my oem bolt thread length in order to allow a gap at the bottom for breaking the tang or if I can get a full length one. Most of the kits I've seen are 10mm length inserts with a few in 20mm.