mercury 8hp gear oil

[jessy1616bike]

hi,i have a mercury 8hp 2stroke outboard(2006)its just been servised but not sure if the correct amount of gear box oil has been used.....ive unscrewed the filler scew on top and leaned the motor over a fair way and no oil seems to come out,there is oil in it because if i undo the drain screw on the bottom new oil comes out.does it need to be full or is there a set amount that put in?

cheers rob

[Chris]

You are meant to undo both screws then squirt oil into the bottom hole until it starts to come out of the top hole.

The top hole is essentially your level.

[m chappelow]

it could be that oil has come out of the top level plug when filled back up at servicing ,but then after a while it could have dropped down a bit owing to trapped air pockets or bubbles especialy if its been filled up too quickly,i usually turn the prop over a few times slowly after filling then check again with some engines its suprizing if left overnight how much you have to top up to get the correct level .