Engines With Inverter - FNM HPE Series Installation Manual

4.3 Engines with inverter

For installation of the engines equipped with inverter, follow
the steps below.
If the engine is supplied without inverter or inverter
disconnected, the latter must be connected to the
engine before fitting it into the engine compartment.
1. Lift the engine and keep it suspended above the side
members. Make sure the engine is level when suspended.
The weight of the inverter offsets the centre of
gravity of the engine. Always make sure that during
lifting the load is distributed and allows the engine to
remain horizontal.
For the criteria for handling the engine, refer to the paragraph
3.2 - Engine Disassembling and Handling on page 7.
2. Lower the engine in the hull position making it go down
slowly.
3. Install the front and rear anti-vibration mounts on the
engine (see paragraph 4.1 – Anti-vibration mounts on
page 14). Do not tighten the nuts of the supports , or the
supports to the side members.
4. Place the engine on the side members and align it so that
the flanges of the transmission shaft and are visually
aligned, as in the image of Figure 16:
OFFSET ERROR
FLANGES ARE PARALLEL WITH THE DISTANCE
BETWEEN THE SIDES CONSTANT IN ALL POINTS
Figure 16- Alignment of the inverter flanges
5. Adjust the height of all supports acting on the engine
support nut (see Figure 10 on page 14) in such a way that
the alignment is as in the image above (perfect
alignment).
It is possible that in order to ensure a correct
alignment the engine is not mounted perfectly
horizontally. Check in the table of chapter 3.6 –
Installation angles on page 13 the maximum angle at
which the correct operation of the engine is ensured.
18 – FNM® Series HPE – Installation Manual
ANGLE ERROR
6. Disconnect the lifting chain, making sure that the engine
rests properly on all its supports.
7. Tighten the supports to the side members.
8. Recheck the alignment of the flanges by checking that the
maximum distance between the two faces is less than
0,05 mm (0.002 in) at intervals of 90 degrees.
9. If the alignment of the engine is not correct, loosen the
supports on the side members and repeat the steps from
point n. 3.
10. Tighten the engine to the supports as described in
paragraph 4.1 – Anti-vibration mounts on page 14.
It is necessary to recheck the engine alignment:
at least 24 hours after installation, with the boat
-
in the water, during the sea trial.
after 30h during the first service.
-
In the engine assembly connection with inverter to the
lineshaft, it is suggested to use a number of flexible joints
specially dimensioned according to the torque to be
transmitted, the length and angles of the lineshaft.
The design and construction of the lineshaft is not
covered by this manual. The installer is responsible
for the appropriate sizing of a lineshaft able to
ensure the correct operation of the engine-
transmission assembly.
After the procedure, it is possible to carry out other operations
of engine connection to the devices, as described in chapter 5,
Services connection to the engine compartment, on page 21.