JET DRIVE
90-826883R2 JUNE 1998 Page 6B-21
Worn (Dull) Impeller
The intake of gravel through the pump can round off and wear the leading edges on the
impeller. Someconditions youmay experiencefrom aworn impellerare (1) a noticeable
performance loss, especially on acceleration, (2) difficultly getting the boat on plane, or
(3)an increaseinengine RPMatwide openthrottle.Checktheimpellerbladesoccasion-
ally for damage. Use a flat file to resharpen the leading edges as shown.
a
b
c
d
a - Do not sharpen or alter the top side lifting angle
b - Leading Edge
c - Sharpen to 1/32 in. (0.8mm) radius by removing material from bottom side
only
d - Enlarged View
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