ZF / HURTH TRASNSMISSIONS SERVICE MANUAL NUMBER 22
Page 8A-6 90-860074--1 FEBRUARY 2002
Important Information
Engine
All current production engines are left hand rotation. Engine rotation is described when
observed from the rear of the engine (transmission end) looking forward (water pump end).
Installed angle of Inboard (MIE) engine should not exceed a maximum of 18 degrees with
respect to the water line.
Transmission
Transmission gear ratio is marked on transmission identification plate, which is located on
the top of transmission. Transmission rotation is described when viewed from the rear of
transmission.
• Do NOT start or crank engine without fluid in transmission.
• Use only recommended fluid in transmission.
• Except in an emergency, never shift transmission at engine speeds above 1000 rpm.
• Free wheeling of one propeller (in a twin engine boat) at trolling speeds will not cause
damage to the transmission; however, boat operation above trolling speed should be
avoided. Ensure that proper fluid level exists before free wheeling propeller.
• Always replace fluid cooler and hoses after a transmission failure or prior to installing a
new or rebuilt transmission. Metallic particles from a failure tend to collect in the cooler
and hoses and will gradually flow back into the fluid system and damage transmission.
• Always use specified fluid cooler, hoses and fittings.
Propeller
Propeller rotation is described when observed from the rear of the boat (stern) looking for-
ward (bow end). The term left-hand (LH) refers to rotation in the counterclockwise (CCW)
direction. The term right-hand (RH) refers to rotation in the clockwise (CW) direction. A LH
propeller will move the boat forward when rotated counterclockwise. A RH propeller will
move the boat forward when rotated clockwise.
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