Time sert length

laurentide

Lieutenant Commander
Joined
Jul 24, 2011
Messages
1,869
I'm hoping to get advice on installing a pair of time serts in my lower unit drain and vent holes. The engine is an '82 70hp, J70ELCNB. The vent hole is stripped (currently helicoiled) and the drain is on its way to being stripped. I'm looking for a more robust installation than helicoils.

I believe that it should be a 3/8 i.d. insert with 16 thread pitch. But I'm not sure what the length of the insert should be to lock in the bottom threads to the tapped hole. Can anyone tell me what the housing wall thickness is on these lower units?

Thanks guys.
 

jimmbo

Fleet Admiral
Joined
May 24, 2004
Messages
9,270
Heli-Coil brand Inserts are as good as anything else, and in a lot of Tests have outperformed Time Sert
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
13,704
I use Keen serts and never had a problem...and a whole lot better than a heli-coil
 
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