LOWER UNIT - 6C-1190-817643R1 DECEMBER 1996
Steering Pull Adjustment
The steering on some boats will have the tendency to
pull towards starboard. This pulling condition can be
corrected by using a pliers and bending the ends of the
exhaust fins (a) 1/16 in. (1.5mm) toward the starboard
side of the outboard.
a
a - Exhaust Fins
Impeller Clearance
Adjustment
1. The impeller should be adjusted so there is approx-
imately 0.03 in. (0.8mm) clearance between the
impeller edge and liner. Operating the jet drive in
waters that contain sand and gravel can cause
wear to the impeller blades, and the clearance will
start to exceed 0.03 in. (0.8mm). As the blades
wear, shims (a) located in the stack outside of the
impeller can be transferred behind the impeller.
This will move the impeller further down into the ta-
pered liner to reduce the clearance.
2. Check the impeller clearance by sliding a feeler
gauge through the intake grate and measure the
clearance between the impeller edge and liner. If
adjustment is required, refer to Impeller Removal
and Installation.
a - Shims
Worn (Dull) Impeller
leading
edge
Do Not sharpen or alter the
top side lifting angle
Sharpen to a 1/32 in. (.8mm) radius by
removing material from bottom side only
Enlarged
View
The intake of gravel through the pump can round off
and wear the leading edges on the impeller. Some
conditions you may experience from a worn impeller
are (1) a noticeable performance loss, especially on
acceleration, (2) difficultly getting the boat on plane, or
(3) an increase in engine RPM at wide open throttle.
Check the impeller blades occasionally for damage.
Use a flat file to resharpen the leading edges as shown.
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