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Rediculous Question

mekay

New member
Well, I'm stumped.

Changed my impeller yesterday and when I went to refill the drive oil, I couldn't get the upper vent plug to screw into the drive. The only thing I can think of is that I somehow dropped the vent plug and picked up another bolt that won't fit.

Are the vent plug and the lower magnetic drive plug the same size?

I am at a complete loss and know this is a stupid question, but it is a real one just the same.

Thanks to an who answer

2001 Mercruiser 5.0L Alpha I gen 2
 
Yes both threaded holes are the same thread size.
I believe the thread size is 3/8-16

The one with the magnet goes in the bottom.
 
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