5 hp Tohastu 4 Stroke Lower end oil change problems .. Help

[dd716ted]

Today I was going to replace the lower end oil in my 5 HP Tohatsu just like I do every year... The bottom lower end drain / fill screw came loose with no problems..BUT no matter what i do, I can't get the top (vent/fill level)screw out.. I have tried the largest screw driver (wide blade) that I have and it won't budge..I am worried that further attempts will render the slot in the screw totally useless.. I don't want to use heat as the paint on the entire motor is like new.. Ideas???

 

[TOHATSU GURU]

Re: 5 hp Tohastu 4 Stroke Lower end oil change problems .. Help

Impact driver

 

[levi_tsk]

Re: 5 hp Tohastu 4 Stroke Lower end oil change problems .. Help

if you dont have an impact driver you can also take your big screwdriver and wack it a few times with a hammer this should knock the corrosion loose from around the screw head and loosen the seal from around the hole

 

[TOHATSU GURU]

Re: 5 hp Tohastu 4 Stroke Lower end oil change problems .. Help

That may very well work, but you will still need an impact driver to tighten the screw back...It's not a corrosion issue, gear case screws should always be tightened by gorillas