Hello I have a 2005 merc 3.3 outboard. I drained lower oil but it is seemingly impossible to refill thru the upper oil level screw am I missing something??
Lower oil install merc 3.3
- Thread starter Cmp1110
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Do you have one screw hole in the lower unit or two? I seem to remember having to fill through the lower bigger hole with the upper screw out, too.
Don't turn it upside down.
Get a squeeze tube of gear oil. Stick it in the lower hole and squeeze until oil comes out the top hole. Put the top screw in then take the tube out of the lower hole and insert that screw. Kind of counter intuitive but it works.
Get a squeeze tube of gear oil. Stick it in the lower hole and squeeze until oil comes out the top hole. Put the top screw in then take the tube out of the lower hole and insert that screw. Kind of counter intuitive but it works.
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It's like putting you finger on the top of a straw to keep the liquid in. Put the squeeze on the tube to keep a little oil coming out the top screw hole. Keep it that way as you put the top screw in. Move the tube away and quickly put the lower screw in.
Yes, you are supposed to fill from the bottom hole, with the top screw out, then when the oil flows from the top hole, replace the top screw. Then you can remove the oil bottle and reinsert the bottom screw. The 9.9 hp engines (2 stroke) work this way and my manual covers the 3.3 as well.
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