Mercury MerCruiser D2.8L D-Tronic Service Manual page 846

ZF / HURTH TRASNSMISSIONS
Transmission Fluid
IMPORTANT: Use only specified transmission fluid.
IMPORTANT: The fluid level dipstick is located on the port side of transmission.
Checking Level
TRANSMISSION WARM
The transmission should be at operating temperature 54-79 degrees C (130-175
degrees F) to get an accurate fluid level reading. Fluid will expand when heated. Fluid
will drain back from the cooler. Expansion and drain-back can significantly affect fluid
level.
IMPORTANT: Fluid level must be checked immediately after engine shut-down to pre-
vent an incorrect reading. Fluid drains back into the transmission from the cooler and
cooler lines.
1. When the transmission is at operating temperature, place selector lever in NEUTRAL.
2. Shut off engine.
3. Remove dipstick and wipe clean.
IMPORTANT: Do not screw dipstick in; press it firmly in and remove.
4. Immediately insert clean dipstick, remove and read fluid level.
5. Add or remove fluid as necessary until the fluid is at the required mark.
TRANSMISSION COLD
NOTE: For ease of checking the fluid prior to engine start-up, a cold fluid level mark can be
made. To find the cold fluid level mark, the fluid level must first be set according to the warm
fluid level checking procedure.
1. Let the boat sit overnight. Insert clean dipstick and read level.
2. Put a mark on the dipstick at the cold fluid level.
NOTE: You can use the new mark to check the fluid level when cold. If fluid level adjustment
is needed, add fluid to the new mark.
Page 8A-8
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002