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| OMC Cobra oil filling diagram |
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Start off by locating the lower drain screw/plug on the lower gearcase. (It is on the stbd. side of the lower unit on the cone - shown in photo). Remove this plug using the largest blade
flathead screwdriver available. Quickly insert your oil pump as snug as possible into the drain hole. |
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| Cobra lower gearcase upper drain screw location |
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Locate the upper drain screw/plug (shown in photo), and remove it using the same flathead screwdriver you used to remove
the lower drain screw. Begin pumping oil into the lower drain hole, and carefully watch the upper drain hole until you
see the oil reach this level. When the oil just reaches the upper drain hole, close it up by inserting the upper drain screw.
(DO NOT STRIP the screw when making sure it is tight enough)
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| Lower unit oil pump |
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Remove the oil pump from the lower drain hole, and quickly insert the drain screw/plug. Again, remove the drain screw
from the upper portion of the lower gearcase, and quickly insert the oil pump into the upper drain hole. Begin pumping oil.
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| 28404 cover |
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On the top side of the upper gearcase, you will see a cover, with four large bolts attached to it. In the center of this cover or cap, you will see a 3/4"
diameter flathead dipstick. Remove it, and note where the oil level is. The oil level on an OMC Cobra should be at the line
on the dipstick. If it is not at this line, keep pumping in oil through the upper drain hole. When the oil reaches the line, put
the dipstick back in. Remove the oil pump, and quickly insert the upper drain plug. Make sure this screw/plug
is tight, but be carefull not to strip the screw. |
