Starter Bolt Size

[whywhyzee]

I am finishing up a rebuild of a 1993 90 HP Johnson. I am missing a bolt for the starter which attaches at the top corner of the intake manifold. Pics attached. It seems to be a different size and/or pitch than the other 2 bolts. Does anyone know the specs for this bolt. I've searched diagrams online and can't seem to find it. Thanks!

 

[saltchuckmatt]

I am finishing up a rebuild of a 1993 90 HP Johnson. I am missing a bolt for the starter which attaches at the top corner of the intake manifold. PicsView attachment 367770View attachment 367771 attached. It seems to be a different size and/or pitch than the other 2 bolts. Does anyone know the specs for this bolt. I've searched diagrams online and can't seem to find it. Thanks!

All three should be the same. 1/2 bolts, not sure of the thread though. Looking at your motor with all the Allen heads and stuff maybe someone had to tap that out.

 

[Crosbyman]

try slowly turning a stick of wax in the hole to copy the thread and diam..... unscrew then measure dia & thread count

or used various taps till one screws in properly

 

[whywhyzee]

All three should be the same. 1/2 bolts, not sure of the thread though. Looking at your motor with all the Allen heads and stuff maybe someone had to tap that out.

I assumed the Allen heads were OE.
I ended up removing the intake manifold for a better look. Turns out a bit of gasket was interfering with the bolt. Cleaned the threads and gasket and no more problem!