Important Information; Shift Control And Cables; Engine; Transmission - Mercury 305 CID Service Manual

Important Information

Shift Control and Cables

! CAUTION
Shift control and shift cable must position trans-
mission shift lever exactly as stated in this manu-
al, or transmission, as a result of improper shift
lever positioning, will not be covered by
Borg-Warner Warranty.
IMPORTANT: Velvet Drive Warranty is jeopar-
dized if the shift lever poppet ball or spring is
permanently removed, or if shift lever is reposi-
tioned or changed in any manner.
Remote control used must position transmission shift
lever over the letter "F" embossed on transmission
case when remote control is placed in forward gear
position. Transmission failure will occur if transmis-
sion shift lever is positioned over the letter "R" and the
wrong rotation propeller is used to propel boat for-
ward.
Remote control also must provide a total shift cable
travel (at transmission end) of at least 2-3/4 in. (70
mm). This is necessary to position transmission shift
lever fully in the forward and reverse gear positions.
Insufficient shift cable travel will cause transmission
to slip and eventually fail.

Engine

Engine rotation is indicated on engine specifications
and serial number decal on flame arrestor cover. En-
gine rotation is described when observed from the
rear of the engine (transmission end) looking forward
(water pump end).
Installed angle of MIE inboard transmission and
engine should not exceed a maximum of 18 of the
water line.

Transmission

Transmission gear ratio (in forward gear) is marked
on transmission identification plate, which is located
on the port (left) side of transmission. Transmission
output shaft rotation and propeller rotation required
is indicated on a decal on transmission case. Trans-
mission rotation is described when viewed from the
rear of transmission with transmission in forward
gear selector position.
Index
90-823225--1 1096
On MIE engines equipped with in-line transmissions
having 1:1 or 3:1 gear ratios, transmission output
shaft rotation is the same as engine rotation with
transmission in forward gear. Engine rotation is LH
(CCW), so a LH propeller is required.
1. DO NOT start or crank engine without fluid in
transmission.
2. Use only recommended fluid in transmission.
3. Except in an emergency, never shift transmission
at engine speeds above 1000 RPM.
4. 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. Be sure
proper fluid level exists before free wheeling pro-
peller.
5. DO NOT paint shift lever poppet ball and spring.
An accumulation of paint here will prevent proper
action of the detent.
6. Always replace oil cooler and hoses after a trans-
mission failure or prior to installing a new or re-
built 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.
7. Always use specified oil cooler, hoses and fit-
tings. Hoses must be at least 13/32 in. (10.5 mm)
I.D. Oil cooler, hoses and fittings must be suffi-
cient size to maintain transmission fluid (in sump)
at 140-190 F (60-88 C).

Propeller

Propeller rotation is described when observed from
the rear of the boat (stern) looking forward (bow end).
The term "left-hand" (LH) refers to rotation in the
counterclockwise (CCW)
"right-hand" (RH) refers to rotation in the clockwise
(CW) direction. A LH propeller will move the boat for-
ward when rotated counterclockwise. A RH propeller
will move the boat forward when rotated clockwise.
Propeller rotation is not necessarily the same as en-
gine rotation.
VELVET DRIVE IN-LINE TRANSMISSION - 8A-3
direction. The term