Onan MCCK - Page 9

Figure 4. Fuel System
Figure 5. Fuel System
Use an approved flexible rubber fuel line next to the
engine. Install the fuel supply line from near the bottom
of the supply tank to the 1/8" pipe-tapped inlet of the
fuel pump (see Fig.6).
A shut-off valve at the tank and near the plant is recom¬
mended for service convenience (Fig.6).
OIL DRAIN
The oil drain may be extended to suit the installation.
The oil base has a 1/2” pipe-tapped hole.
Figure 6. Fuel Shut-Off Valve
VENTILATION
Generating plants require fresh air for combustion and
generator cooling. Onan recommends that the ventilation
system he able to deliver 1-1/2 to 2 times the air re¬
quired by the plant. When the ventilation system depends
on wind or boat motion, use powered exhausters to pro¬
vide ventilation when the boat is not in motion. For more
information, refer to Onan Technical Bulletin T-021.
EXHAUST
See Installation, Fig.l and 2. The engine exhaust con¬
nection is 1”, pipe-tapped. Pipe exhaust gases outside
of the hull - exhaust gases are deadly poisonous ’
Install a separate exhaust line as follows:
1. Above vessel load water line.
2. Pitched downward to prevent water backflow.
3. Shield line near combustible material.
4. Use flexible hose or tubing (see Fig.l and 2).
5. For turns, use sweeping (long radius) elbows.
6. Increase one pipe size for every 10' increase in pipe
length.
Provide a tee for water line connection for wet exhaust
(Fig.7). Refer to Water Discharge Line. Raise the dry
portion of the exhaust line high enough to prevent water
back-flowing into the engine. Onan recommends using
the Aqua Lift muffler for maximum silencing efficiency
and ease of installation.
8
Figure 7. Water Outlet Connections