GASOLINE ENGINES BRAVO MODELS
Page 6 of 116
INTERNAL AND EXTERNAL TIE BAR
As a boat moves into a moderate performance range (60-70 MPH) or for a reduction in steer-
ing backlash, an external tie bar should be added. External tie bars are usually designed
to attach at the aft power trim cylinder bosses which is an excellent location because of its
proximity to the propeller. HOWEVER, because of the potential overstress that can occur
if one sterndrive is trimmed much differently than the other, a dual trim control kit (Part Num-
ber 90362A3) should be installed so as to limit this potential tilt differential to about 20°.
IMPORTANT: Mercury Marine does not recommend the use of an external tie bar
ONLY with no internal tie bar when using the internal power steering system. This can
cause excessive loads on the steering components on the sterndrive connected to
the internal power steering system. These increased loads can damage the steering
components, resulting in increased play in the steering of the boat.
EXTERNAL POWER STEERING
When boat speeds move past 70 MPH or if additional steering backlash reduction is desired,
external power steering is recommended. This normally will include an external tie bar
mounted at the same general location of the power steering cylinders, which are generally
attached at the top of the sterndrive’s drive shaft housing. With this steering system, no inter-
nal tie bar should be used. These steering cylinders can be attached either inboard (be-
tween) or outboard of the sterndrives.
EXTERNAL POWER STEERING WITH LOW EXTERNAL TIE BAR
For the fastest boats (over 80 MPH) or for the ultimate in steering backlash reduction, use
external power steering, BUT (where mechanically possible) with the external tie bar
mounted at the trim cylinder boss location (as previously described in “Internal and External
Tie Bar” statements). Again this system does not use an internal tie bar.
Quicksilver Products
ACCESSORIES
Quicksilver remote controls, steering systems, propellers, etc. are available for this product.
Refer to “Quicksilver Accessories Guide” for complete listing.
This “Guide” is available from:
Attn: Parts Department
Mercury Marine
W6250 W. Pioneer Road
P.O. Box 1939
Fond du Lac, WI 54936-1939
OR –
Outside of U.S.A., order through
Distribution Center, or Distributor.
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