Hamilton Jet HJ212, Installation And Service Manual

Page: 113 / 198

Installation and Service Manual
Overhaul
Tailpipe and Impeller Reassembly
Refer to drawing: HJ21201000 Base Jet Assembly.

Smear a light coating of grease over the complete mainshaft.

Insert the impeller key [11] into the keyway in the mainshaft.

Slide the impeller onto the mainshaft, ensuring that the impeller engages with impeller key [11].

Fit the water bearing sleeve [4] onto the mainshaft.

Apply Loctite 243 or equivalent to the mainshaft threads.

Fit the impeller nut [10] and hand tighten.

Temporarily slide the tailpipe [41] into place onto the studs [30] fitted to the rear of the intake. Check
that the jet rotates freely and the impeller does not touch the wear ring [37].

Remove the tailpipe [41], using a suitable spanner to restrain the bearing retaining nut [9], tighten the
impeller nut [10] to 200Nm (148lbf ft). Ensure that the mainshaft is supported during torque loading of
the impeller nut so that the bearing [7] is not overloaded.

Check the o-ring [42] fitted to the intake recess, for permanent set. Replace if necessary.

To fit a new o-ring, stretch the o-ring by hand until it is a snug fit and holds itself in place inside the intake
recess.

Smear the o-ring and the intake recess with grease to ensure that the o-ring is not pinched during
assembly.

Fit the tailpipe [41] into place onto the studs [30] fitted to the rear of the intake and secure in place with
spring washer [16] and nuts [17].

Check that the jet unit mainshaft still turns freely.
Transom Plate Assembly Overhaul
Refer to drawing: HJ21208002 Installation Details Al.
Refer to drawing: HJ21208001 Installation Details GRP.
Transom Plate Removal
The transom plate [1] can only be removed from the jet unit with the reverse duct removed.
Should it be necessary to remove the transom plate from the vessel transom, carry out the following actions:

Remove the reverse duct and splash guard. Refer to section: Reverse Duct Removal on page 9-6.

Remove nut [4], spring washer [5] and flat washer [6] securing the transom plate to the transom.

Remove the steering tiller stop from the transom. Refer to drawing: HJ21206000 Steering Assembly.

Remove the securing screws [9] from the transom plate.

The transom plate is attached to the transom using marine sealant and will require some effort to
remove from the transom.

Remove the transom plate rearwards off the end of the tailpipe.

Remove and discard the transom seal o-ring [8] from the seal groove in the jet unit intake.

Check the transom plate for damage, distortion or corrosion. Repair as required. Ensure that the seal
contact surface of the transom plate is free of corrosion and will give a good contact area with the
transom seal [8].
9-31