Aspen C90 User manual

1
C90 Owners Manual

Shore Power Disconnect
Switch Off Breaker First Disconnect at Boat
Never leave hot (breaker on ) a
loose cord on dock could
shock swimmers If it was to
drop in water.

Battery Switches Normally On
In Engine Room
The C90 has three main battery switches ,
House On/Off ,Engine On /Off, and
Emergency Parallel. The normal operation
position is to leave both Engine and House
switches in the On Position, Emergency
Parallel is Off.
Emergency parallel is rarely used, the boat
has a Blue Sea’s Voltage Sensitive relay
(black box near switches) it disconnects
the House Batteries from the Start Battery.
When the voltage on the Start Battery
drops below 12.7 volts it disconnects, once
the charging system has brought the Start
Battery back up to 12.7 volts it reconnects
to the house battery bank.
The Batteries have three charge sources,
First, 2 ProMariner Chargers (8A for Start
Battery and 20A for House Battery) Shore
Power is connected and AC Breakers at
dash are switched on. Second, two 80W
Solar Chargers (10A) while anchored-
automatic, Third is a 125A engine driven
Alternator.
Thruster Battery Switches, These are
mounted below 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
Thruster for more that 30 seconds at
one time or motor may over heat.

Fuel System –Filters -
Priming
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.

Full Time Power Breaker
Always On 12V power
Fuse is just inside engine
room door. 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. If Fuse is
Burned Out, there is no
bilge pump protection
from leaks.
Engine room inside wall

Engine Oil
Transmission Oil
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.

Voltage Sensitive Relay
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
Note: Chargers will only charge if
they see voltage. If batteries have
been run dead flat you will need
to use Emergency Parallel Switch,
charge for 10-15 minutes to charge
batteries enough for Charger to
see voltage.

Sea Water Ball Valves
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

Starboard Lazarette
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.

Propane Tank Storage and
Operation
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.