Aspen C90 User manual

1
C90 Owners Manual

Switch Off Breaker First
Disconnect at Boat
Coil about 12” across and stow next to
propane locker on aft deck. Never leave
hot (breaker on ) a loose cord on dock
could shock swimmers If it was to drop in
water.

The C90 has three main battery switches , House on Off/Off ,Engine On
/Off, and Emergency Parallel. The Normal position is to leave both Engine
and House switches in the on position. The Emergency parallel is off.
Emergency parallel is rarely used as the boat has a Blue Seas Voltage Sensitive
relay (black box above switches that disconnects the house batteries from the
starter battery when the voltage on the start battery drops below 12.7 volts. As
soon as the charge system has brought the start battery back up to 12.7 volts it
reconnects the house battery bank and begins charging it automatically. The
batteries have three charge sources, First, 2 ProMariner Chargers (8 amp
engine, 20 amp house) that come on when shore power is connected and
breakers at dash are switched on. Second two 80 watt solar chargers (10
Amps) while anchored-automatic, third a 125 Amp engine driven alternator.
Thruster Battery Switches, These are
mounted above the main battery
switches and are normally on. These
must be switched off when swimmers
are in the water or for service. The
thrusters are very powerful and will
suck objects in the water toward them.
Do not operate for more that 30 seconds
at one time or motor may over heat.

The C90 fuel system includes two filters and a electric switching valve at the dash. In
normal operation there is no owner/operator activity other than to inspect the Raycor
Filters clear glass bowel for water (clear liquid) and drain in to cup through petcock at
bottom if present. If the boat has set unused for several days the primer plunger on the
white Cummins filter housing should be pressed 8-10 times or until it gets hard, this
speeds crank/starting. This plunger will also be needed to prime should you run out of
fuel. Raycore uses a 10 Micron 500ser diesel filter.
Fuel Tank Switch is located to the left
side of dash. Its is labeled Main and
Aux, Main is the engine side tank, Aux
is the port tank. Depress toggle for tank
desired. You typically will run on one
tank for 3 hrs then switch so tanks drop
equally while underway. Each tank is
40 gallons approximately 36 is usable.
With full fuel at 14Kts you should have
approximately 16 Hrs running time.
This switch also swaps the engines fuel
return lines at the same time.

Always On 12V power
breaker is just inside engine
room door. It is shown here
with flipper tang tucked up
this is ON position.
Depressing the red plunger
will turn it off. Its important
to leave this on except for
service as it supplies power
to the boats 6 automatic bilge
pumps and other devices that
need power to save memory
settings. It is not affected by
battery switch position. After
each engine service be certain
to check this breaker has not
been bumped off. If it is off
there is no bilge pump
protection for leaks.
Here the full
time power
breaker is OFF,
(flipper tang
down) for
service only or
to reset
electronics or
furnace.
Engine room inside wall
Note:on recent boats this
is a RED 50 amp fuse in the
same location.

The Cummins QSD 2.0 liter engine uses
premium 15-40 oil. It’s best to check oils
prior to use. Be carful not to spill or
overfill. Change oil and filter when new at
50 hrs then every 100 hrs after.
The Twin Disk Transmission uses 30 wt motor oil for its gear lubrication and to
engage its clutch. Check oil engine warm/off within 2-3 minutes of shut down. If the
oil is low the clutch will drop out and the boat will stop-find leak-refill. To top off,
it’s easiest to fill through the dip stick opening with supplied funnel check frequently
while filling as overfilling can damage the transmission. Change after 50 Hrs and
then every 100 hrs, clean wire mesh filter.

This Blue Seas Systems
unit separates the house
batteries from the start
batteries automatically
when the house voltage
is bellow 12.7 volts. No
user activity is required.
Battery Chargers
These ProMariner automatic chargers
are wired to come on when the boats
shore power is connected and the A/C
breakers at the dash are switched on. The
chargers are 4 stage smart units that
charge aggressively if the battery is low
and then ramp down as it fills. They
then drop out completely when full and
then do a small topping charge weekly.
The design greatly extends battery life
and over charging and subsequent
battery damage. Check battery water
levels monthly ,lower water levels/
exposed plates will damage the batteries
lead plates requiring replacement.
Engine Room Fwd Wall
Engine Room Inside wall

There are two raw water valves on the boat both in the Starboard
Lazarette (inside hull side fwd). The smaller one ½” is for the head
and the aft deck wash down. The larger one 1.5” is for the engine
cooling water.
½ Inch raw water valve is run typically at 45 degrees to reduce its pressure
while underway and stop head overflow. These valves are typically left on
as running the boat with valves closed will damage the engine and
impellers.
Raw Water Valve OFF Raw Water Valve On, 45 degrees
Engine Cooling Water Ball Valve Off Engine Cooling Water ON
Be sure to close valve when cleaning the raw water strainer

House Batteries 2ea
G27 Deep cycle, wet
lead acid, 4” water lift
muffler to left, drain
muffler when stored
for winter with drain
bolt at bottom, re-
silicone bolt after.
Engine start battery G27
(Center), Teliflex SeaStar
hydraulic steering ram. Note:
Rudder packing should be re-
tightened/checked with each oil
change.
Drip-Less shaft seal oil reservoir,
keep ½ full with ATF type
transmission fluid (automotive type).
If it is using fluid it is very likely time
to change the three oil seals on the
prop shaft. Boat must be out of water
to do this service. Oil will
discolor/darken some with use.

Tip out Bin on early Boats/New boats
have box in Port Cockpit storage locker.
Note: Locker is plumbed with a hose to a
through hull overboard so a gas leak
would not inter the boat. If you ever smell
gas stop-turn off valve and open boat to
clear fumes. Find leak.
To use, make sure hose connection
is tight, open valve, gauge will show
aprox 90 Psi. If you hear a hissing or
smell gas turn valve off ,check
connections. 15 pound tank will
typically last 2+ weeks.
Electric shut off valve only comes on if gas
controller by sink is on and sniffer smells no
gas.
Re-Installing gas box lid is easier if tip out
bin is part way closed. The tank must be
centered in compartment to latch lid in
place.