97 Johnson 40 HP Lower Unit Screws

[MAD0405]

Hello, I have received this boat / motor from my grandfather. I am in the process of changing the lower unit oil and noticed these two screws that I am not sure what they are. I tried looking it up and I cant find them anywhere. Does anyone here know what they are for ? Thanks in advance !

 

[MAD0405]

I dont think the original picture attached ?

 

[eeshaw]

They may be for adding lubricant to the lower unit, at least that's what they appear to be.

 

[LDUBS]

According to a parts diagram I viewed one is a retaining screw and the other is a shift lever screw. What they do is beyond me.

 

[Pappy]

The one you pointed out is a pinion bearing retaining screw. The one up just under the cavitation plate at the front of the gearcase is the vent screw for gearcase fill and draining.

 

[MAD0405]

Thanks Guys ! I am unsure what they do either lol I know the Vent screw in the top right of the picture and then the fill screw is below where you cant actually see it in the pic.
I was just curious , thanks again !

 

[Pappy]

I just told you what they are and you are still unsure??

 

[Sinkingfast]

Well...be careful of removing screws...There was a boy many years ago that was born with a golden screw instead of a belly button. His parents told him never to remove that screw. He often asked what that screw was for but received no answer. He soon turned 14 years old and his curiosity got the best of him. One day he sat down and took a screwdriver to that screw and removed it....sat there and nothing happened. Figuring he was good to go he stood up and his *** fell off. True story....

 

[Pappy]

Hmmmmmm...............

"Never believe everything you read on the internet as it may not be true" - Abraham LIncoln

 

[old_fart]

Well...be careful of removing screws...There was a boy many years ago that was born with a golden screw instead of a belly button. His parents told him never to remove that screw. He often asked what that screw was for but received no answer. He soon turned 14 years old and his curiosity got the best of him. One day he sat down and took a screwdriver to that screw and removed it....sat there and nothing happened. Figuring he was good to go he stood up and his *** fell off. True story....

This explains many things...

-W