TOHATSU 2.5 Owner's Manual page 40

@ Changing the gear oil
(a) Set the outboard in an upright position. Place a drain pan under the gear
case. Remove the lower drain plug first, and then remove the upper oil
plug Drain the oil completely.
(b) Insert the oil tube nozzle into the lower oil plug hole. and squeeze the
tube until the oil flows out of the upper plug hole.
(c) Install the upper oil plug. Then rermwe the oil tube nozzle and install the
lower oil plug.
Note:
(1) Use genuine gear oil or. if not available, use an API (American
Petroleum Institute) oil grade of GL5. SAE MO to #90.
(2) Required volume: Approx. 16OmL (6.06 US fluid oz)(3SBz)
Approx. 90mL (3.04 US fluid oz)(2SM35Az)
A
CAUTION
(1) Treat the drained gear oil in the proper way as an industrial waste.
(2) If the drain oil is found to be a milky color when changing the gear
oil. this indicates water suck into the gear case. In this case,
contact your dealer immediately to make an inspection and
perform any repairs necessary so as to avoid serious mechanical
damage.
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