Mercury Jet 65 - Impeller Clearance Adjustment

MAINTENANCE
45
Check the impeller blades occasionally for damage. Use a flat file to resharpen the leading edges. Sharpen to a
0.8 mm (1/32 in.) radius by removing material from bottom side only.
ob01409
b
a
a - Leading edge b - Top side lifting angle
Impeller Clearance Adjustment
The impeller should be adjusted so there is approximately 0.8 mm (0.03 in.) 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 0.8 mm (0.03 in.).
As the blades wear, shims located in the stack outside of the impeller can be transferred behind the impeller. This
will move the impeller further down into the tapered liner to reduce the clearance.
ob01410
b
a
a - Shims
b - Clearance between impeller edge and liner
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.