Posted by jofa on February 11, 2005 at 17:18:40

In Reply to: what maint do i need to do to my 9.9??? posted by jofa on February 11, 2005 at 17:06:44:

Simple enough with your motor in an up right position, Do the following. you will see 2 large straight head screws. The lower one will be marked fill the upper one will be marked vent. If changing the lube, place a small bucket under the foot of the motor. Remove the bottom screw, then the vent screw allow all the oil to drain into the pan or bucket. Next simply cut the spout on your new bottle or tube of 80w-90w marine gear lube to fit the fill hole tightly. Squeeze the bottle or tube until oil flows smoothly out the vent hole, while maintaining pressure on the bottle replace the vent screw. then remove the bottle and quickly replace the bottom screw. tighten both screws securely wipe the excess from the foot and dispose of the old oil and you are done. There are many synthetic lubricants for marine gear cases. I would not use them with this motor.Stick with good quality oil and change it every year. If you suspect a leaky seal, Replace it. Good sailing,TG.