Hamilton Jet HJ241, Manual

Page: 95 / 202

8.9
8 MAINTENANCE
8.5 S
ERVICING
D
ETAILS
HJ-241 / HSRX
17 Jet Unit Carry out internal examination of the Jet Unit after the first 2000
hrs of operation and thereafter every 5000 hrs. This examination
should be carried out with the vessel out of the water.
The following checks should be carried out:-
a) Impeller Blades - Check Clearance
• Remove the Main Inspection Cover. Using Feeler Gauges,
check the clearance between the tips of the Impeller Blades
and the Wear Ring at each side of the Impeller (not at the top
and bottom of the Impeller).
• Maximum recommended worn clearance is 1.1 mm (0.043")
per side. New clearance is approximately 0.5mm (0.020”).
ITEM NO ITEM OPERATION