Lower Unit lube screw removal

[bm258]

1989 Johnson GT 100. I have drianed the gear lube out of the lower unit. However, when trying to remove the top screw i could not get it to budge. I have broken and bent a bit, broken a screwdriver, and my wrist feels like it is broken also. The screw is starting to round off. Anyone have any advice on how to remove the screw. Thanks

 

[ob]

Re: Lower Unit lube screw removal

Well ,I wished you had asked before you rounded off the screw slot.Two ways now.If you have a dremmel tool with a narrow cut off wheel ,you could grind a bit deeper slot(being careful not to hit the case) and try an impact driver to remove.Slot and blade need to fit snug or the same will insue.<br /><br />Another way is to get a good sharp nose tapered punch and working from the edge of the screw slot,attempt to hammer it counter clockwise and see if you can get it to break free.Good luck.

 

[ledgefinder]

Re: Lower Unit lube screw removal

Heat. The case is aluminum & the screw is stainless steel. They expand at different rates with temperature. Hit it with a propane torch for about 1 minute, then try it again.

 

[bm258]

Re: Lower Unit lube screw removal

ob, thanks i just got the screw out by tapping a punch with a hammer. thanks again.

 

[ob]

Re: Lower Unit lube screw removal

Glad to hear it.Make sure you use new seal washers on the replacement.

 

[PDS]

Re: Lower Unit lube screw removal

Good to hear you got it out. My favorite tool is a hand held hammer impact. Iv'e removed 40 year old screws by using it with proper bits, plus mine(Sears craftsman 1/2")can be used with sockets and it only cost 20 bucks. As always, replace the gaskets when you change LU oil.