COBIA 350 CC User manual

1
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
350 CC Owner’s Manual
Revised September 2020

2
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Dear New Cobia Owner,
On behalf of Cobia Boats, I would like to
congratulate you on your purchase. We at Cobia
strive to build the best products possible and wish
you years of trouble-free enjoyment. There are
many things to know about the operation, care,
and maintenance of our products and the systems
we install in them. Please review all the applicable
information for your new boat. The more you
know, the more you will enjoy your new Cobia.
Again, a heartfelt thank you from myself and the
whole Cobia Family.
Scott Deal
President and CEO

3
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Table of Contents
Cobia 350 CC Specifications ...............................................................................................................4
Pre-Operation Checklist.........................................................................................................................5
Maintenance & Cleaning .....................................................................................................................6
Engine Break-In Period ...........................................................................................................................7
Helm & Command Link Gauges .........................................................................................................8
Fuel-Water Separator & Drain ..............................................................................................................9
Bilge ...........................................................................................................................................................10
Systems......................................................................................................................................................12
Console Access and Console Interior..............................................................................................13
Cockpit Courtesy Lights .......................................................................................................................17
Ladder & Props.......................................................................................................................................18
Steering.....................................................................................................................................................19
Fuel System ..............................................................................................................................................20
Self-Bailing Cockpit & Livewell ...........................................................................................................20
Rod Storage & Fish Lockers .................................................................................................................22
Macerator Access & Operation........................................................................................................23
Anchor Locker ........................................................................................................................................24
Battery Switch and Main Distribution Panel ...................................................................................24
Seating......................................................................................................................................................26
Standard Features .................................................................................................................................28
Optional Features ..................................................................................................................................31
Cobia 350 CC Console Wire Harness...............................................................................................38
Cobia 350 CC Deck Wire Harness ....................................................................................................39
Cobia 350 CC Hardtop Wire Harness...............................................................................................40
Cobia 350 CC Hull Wire Harness........................................................................................................41
Cobia 350 CC Bunk Placement Diagram.......................................................................................42
Upholstery Care & Cleaning Guide..................................................................................................43
Warranty...................................................................................................................................................44

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Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Cobia 350 CC Specifications
L.O.A.......................................................................................................................34’04”
BEAM......................................................................………………….….................11’ 02”
DRAFT..........................................................................................................................24”
WEIGHT W/O ENGINE.......................................................................................7,324 LBS.
FUEL CAPACITY..................................................................................................320 GAL.
DEADRISE @ TRANSOM....................................................................................21.6 DEG.
MAXIMUM H.P.............................................................................................................900
TRANSOM HEIGHT…………………………………..…...…….……30” SINGLES 25” TWINS
COCKPIT SQUARE FOOTAGE.........................................................................131 SQ. FT.
Anchor Locker
Insulated
Storage
Chaise Lounge
Coolers
Livewell
Macerated Fishbox
Bilge Access
Macerated Fishbox

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Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Pre-Operation Checklist
We recommend you print this document and store it at the helm station.

6
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Maintenance & Cleaning
Maintenance
Cobia advises owners that maintenance and repairs should be performed at an
authorized Cobia Dealer. The following information is general in nature and should not
be considered a repair manual or guidelines set forth by Maverick Boat Group.
Cleaning
Each Cobia boat is constructed using the finest materials and components available.
However, no material is immune to the ravages of the saltwater environment. After each
use, your boat should be thoroughly washed using fresh water. To avoid water spots, dry
your vessel using a soft cloth. A fiberglass wax may be used to preserve the luster of the
hull.
Thorough and routine cleanings of your stainless fittings are required to maintain their
appearance. After each use of your boat, clean stainless fittings using fresh water and a
mild soap. Dry fittings completely. A wax or polish may be applied after cleaning. Any
rust must be removed as soon as possible to prevent irreversible damage to your vessel
and/or its components. A light coat of lubricant on metal railing, screws and electrical
connections will help prevent electrolysis. The same holds true for your trailer. Refer to
page 43 for upholstery care and cleaning instructions.

7
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Engine Break-In Period
Engine Break-In Period
New engines require a period of break-in to allow the surfaces of the moving parts to
mate evenly. Different engines require different break-in periods and methods. For
instructions on break-in methods, refer to your Yamaha Engine Owner’s Manual for the
correct break-in procedures and times for your model engines.
Engine Stop Switch
If activated, the spring-loaded engine stop switch
will automatically shut down the engine during
emergency situations to prevent uncontrolled or
unattended operation. Certain emergency
conditions (e.g., turbulent water, wakes,
unanticipated movement) may impair a person’s
ability to operate the craft safely. The switch, located
on the helm, must have the safety lanyard attached
at its base. This activates the protective shutdown
circuitry.
Securely attach the other end of the lanyard to the operator of the boat. If the operator
moves, falls or is at an unsafe distance from the steering wheel, tension on the lanyard
will pull it from the switch. When the lanyard is removed, the engine stop switch is
released and automatic engine shutdown occurs.
Engine Stop Switch
DANGER:
An engine stop switch system that is not used or does not function
properly can cause death or serious injury. DO NOT operate the boat if
the engine stop switch system does not function properly. Go to a
Cobia Dealer to have this resolved immediately.
The lanyard should be securely attached to the boat operator at all times that
the engine is on.

8
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Helm & Command Link Gauges
Switch Panel & Helm
At the helm of your Cobia, you have a main switch
panel, which is located above the steering wheel.
This panel controls your lights, horn, accessories,
livewell, and your bilge. When a switch is in the
“on” position, its tip is illuminated. This alerts you
that the associated accessory should be functioning
and also reminds you to turn it off during boat
shutdown. When the
“NAV” light switch is in the
“on” position, the labels for the switches will be illuminated. To
the right of the steering wheel you have your two trim tab
switches. The boat also comes standard with a compass
mounted on top of the console.
Command Link Plus Display
Command Link Plus Display come standard on your new Cobia. These are an upgrade
from the Command Link gauges. The Command Link Plus Display allows access to more
information on a single display. Displays are user-selectable so you can choose the
functions displayed and in what order. To learn the gauge’s full functionality, refer to
your Yamaha engine owner’s manual located in the Cobia Duffel Bag.
Helm Station
Compass
Twins
Triple

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Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Cobia Duffel Bag
Along with your boat, you received a Duffel Bag with your new Cobia. Inside the Duffel
Bag are the following items:
oLarge Livewell Standpipe
oShort Livewell Standpipe
o1.5” Livewell Pacifier Plug
o2 ignition Keys and Emergency Kill Cord /Engine Stop Lanyard
oEngine Start Cord
oVarious Accessories Manuals
Fuel-Water Separator & Drain
Fuel-Water Separator
Yamaha Fuel-Water Separators (one for each
engine) are installed between the fuel tank and
engines on the 350. Simply locate the controls for
the electronic lift assist, labeled “Hatch”, mounted
on the starboard side of the tackle station directly
across from the gunwale, and you will be able to
easily access the Fuel-Water separators.
The new, improved 10-micron filter provides
superior filtration ahead of the engine's on-board filters and injectors. Large filtering
and water capture areas maximize filtration while maintaining adequate flow rate for
larger engines. The fuel separator can be checked by removing it from the mounting
bracket and dumping it into an approved waste collection device. If there appears to be
an excessive amount of water, the filter component should be replaced. See your
authorized Cobia Dealer for replacement parts.
Maintenance Note: Yamaha recommends replacing the 10-
micron fuel filter on new boats after the first 10 hours or 1 month of
operation and every 50 hours or every 6 months thereafter. In
areas of high humidity where water in fuel supplies is a problem or
extensive engine operation occurs, more frequent replacement
may be necessary.
Fuel-Water Separators

10
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Garboard Drain Plug
The garboard drain plug is the small metal plug
located at the lowest point on the hull, at the bottom of
the transom right above the keel. The drain has been
designed so that it can be loosened by hand while the
hull is out of the water for draining. This allows the
plug to stay in contact with the surrounding frame so
you’ll never misplace or lose it. You can completely
remove the insert by pulling back and continue
turning in a counter-clockwise motion. It is manufactured with a rubber seal in place to
ensure your bilge is watertight. Always make sure before putting the boat in the water
that this plug is hand tightened firmly. Excess water in the bilge may be an indication of
a problem with this plug or the automatic bilge pump.
Bilge
Bilge Access
First, locate the controls on the electronic lift assist, labeled “Hatch”, mounted on the
starboard side of the tackle station directly across from the gunwale. Next, press and
hold the top button on the controls. This will cause the rear access to lift revealing the
bilge access. To lower the hatch simply press and hold the bottom button on the control
panel until the aft section is fully closed. Remember that the electronic lift assist
operates using the house battery system.
In the event that the boat does not have power to electronically lift the hatch, the
electronic lift can be disengaged by lowering the bench seat and using the access
opening shown below to remove the pin from the electronic ram. Keep in mind that at
this point the hatch will no longer be supported in the up position and will require being
held up to maintain access to the bilge. Once the work in the bilge is finished and power
is restored to the hatch lift, it is important to attach the ram to the hatch with the pin
once again to secure the door in the closed position.
Drain Plug

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Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Bilge
The bilge of your Cobia should always be checked before and after a launch. While
checking the bilge, note that a small amount of water in the bilge is normal. However, a
large amount of water or any signs of fuel or oil requires immediate attention. If such a
situation exists, the boat should be taken to a certified marine technician
immediately. Never pump fuel or oil overboard while your boat is in the
water.
Large quantities of water in the bilge may be an indication of a leak or that the bilge
pump and/or automatic float switch is not functioning properly due to a jam, clog or
electrical issue. The automatic float switch is wired to the hot side of the battery switch
through the “BILGE” fuse at the battery switch panel. When functioning properly, the
float switch activates the bilge pump to pump water overboard once water in the bilge
reaches a level that submerges the switch.
If the bilge pump does not come on when the float switch is submerged, attempt to
manually turn it on through your switch panel. If the bilge pump comes on and
evacuates the water, it is clear that the float switch is not functioning properly. If the
bilge pump does not come on via the switch panel, check the breaker panel inside the
console to see if a breaker has been tripped. If the breaker has been tripped, reset it and
turn the switch on again, listening for the bilge pump to turn on.
If the bilge pump fails to turn on, turn the battery switch to the OFF position, then
unhook the bilge pump from its cradle by pressing the locking tab and twist motor
housing counter-clockwise. You will feel the pump release from the cradle. The entire
Hatch Control
Electric Ram and Hatch Pin
Bilge Access

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Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
bilge pump and wiring should release from the cradle. After removing the pump, check
the underside and impeller areas for miscellaneous items that might clog the pump. If
any obstructions are present remove the debris and set the pump back into the cradle.
Once set back in the cradle, press the pump down on the base then twist until the lock
button snaps it into place. Once this is completed you can try to turn the pump on again.
If the bilge pump still does not turn on, it likely needs to be replaced. It is not
recommended to use your boat if the bilge pump and/or float switch are not functioning
properly.
Systems
Ball Valves
Ball valves can be used to serve several purposes.
They allow seawater to enter the boat, in the case of
livewells, and they also act as a safeguard to stop
water from entering. To tell which position a ball
valve is in, open or closed, look at the valve and
determine the direction of flow. When the ball
valve handle is in the same position as the
direction of flow, the valve is in the “OPEN”
position. When the ball valve handle appears to
cross the direction of flow, the valve is in the
“CLOSED” position. The ball valves can be accessed
in the bilge compartment behind the aft seating.
350 Deckdrain System
The deckdrain system is equipped with 1 1/2” thru hull fittings through the aft port and
starboard hull sides. These fittings have to be installed lower than the drains in the
cockpit floor so that gravity will allow the cockpit to drain free of water. This puts these
fittings very close to the water line of the hull. These drains are rigged with ball valves
that can be opened and closed to control the flow of water. In the open position, these
ball valves will allow water to flow freely from the cockpit, thus making the boat “self-
bailing”. When closed, no water will be allowed to travel to or from the cockpit.

13
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
350 Livewell Pump Assembly
The livewell pump assembly is composed of a scoop
strainer mounted to the bottom of the hull, a thru hull
fitting, ball valve assembly, and the pump. As you can
see, the ball valve assembly is in the “OPEN” position.
This is the correct position for the operation of the
livewell.
Console Access and Console Interior
Inside the console you’ll find the electric head with macerator, fresh water sink with
spray nozzle for rinsing off, switch panel for flushing head and on-off switch for
macerator. There is a DC breaker panel inside and also two opening port hole windows.
There is also access to the macerator, y-valve, water intake and discharge for the toilet
and holding tank, and another access to the forward bilge.
Console/Head Access
Located at the top on the inside of the console/head
access door is a locking gas shock that aides in opening
the door and keeping the door open once the shock is
fully extended. With the door fully opened, it can only
be closed by releasing the pressure of the metal sleeve
on the door side against the shock that is mounted to
the console. To do this, open the door to its fullest open
position, thereby allowing the door slide sleeve to be
moved so that it will slide overtop of the gas shock as the door closes. Failure to release
this locking mechanism while attempting to close the door will lead to the gas shock
failing, or damage to the mounting brackets.
Livewell Pump Assembly in the “OPEN”
Position
Gas Shock

14
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
DC Main Breaker Panel
The DC main breaker panel is located to the left of the mirror and contains
the breakers for the accessories on the helm switch panel. If an accessory is
not working it may because its breaker has been popped. Simply find the
rubber button on the breaker panel for the associated accessory and press it
in. You should feel an internal button move in and then catch. This will
reset the breaker and close the circuit. If the accessory still is not working or
the breaker pops again, another issue is present.
The backside of the switch panel and the electronics can be reached inside
the door with the mirror. The fuse box on the back of the door contains the
fuses for the helm electronics such as the GPS units and VHF.
Electric Head Operation
To operate the head, first, make sure that the intake/fill valve located on the inside of
the bottom of the hull accessed through the hatch to the left side of the toilet. The valve
is open when its handle is pointing
straight up (pictured to the left). This
will allow water to enter the head
upon flushing.
Once you’ve finished using the head,
press the flush button labeled “Elec
Head” on the switch panel. This will
push the contents of the head into
the holding tank. Note that the toilet
contents will always go into the
holding tank first, no matter if
planning on pumping out or using
the macerator.
To evacuate the holding tank via a marina pump out,
make sure that the handle for the Y-valve (located in
the access hatch to the right of the toilet) is in the
correct position. This will allow the tank contents to
be sucked out of the tank via the waste deck fitting
on the deck. The discharge for the deck fitting will
always be the topmost outlet on the Y-valve. The
Main Breaker Panel
Intake/Fill Valve in the “OPEN” Position
Flush Button & Macerator Switch

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Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
handle is in the correct position if the arrow for the top outlet IS NOT covered by the
wide end of the handle.
This is the position the handle should be kept in at all times to prevent the possibility of
mistakenly discharging waste overboard in waters illegally. (Within 3 miles of shore and
where otherwise designated.) If desired, the handle can be locked in this position by
inserting a padlock through the hole on the handle and through the housing on the Y-
valve.
To evacuate the tank overboard using the macerator, open the valve on the waste
discharge thru hull located next to the head intake valve/thru hull. The Y-valve handle
should then be turned so that the wide portion of the handle covers the silver arrow for
the pump-out outlet (the top outlet.) The visible arrows should now be showing the flow
to be going downward. Next, press down the macerator switch on the panel. This will
push the contents in the holding tank out the bottom of the boat through the waste
discharge thru hull. Once the process is complete it is advisable to close the discharge
valve and put the Y-valve handle back into the pump-out position. (The wide portion of
the handle covering the down arrow.)
The Jabsco Y-Valve is designed to provide flexibility of onboard waste management by
diverting waste either to the dockside pump-out fitting or directly overboard where legal
to do so. Check local and federal regulations to determine where direct overboard
discharge of untreated waste is permitted.
Note: The visible arrows on the Y-valve always show the direction of
the flow. In other words, the wide end of the handle always covers the
arrow for the outlet where the flow is NOT going to go. If the flow is
pointing downwards, the waste is being directed through the bottom
of the hull and overboard. If the flow is pointing up, the waste is being
directed upward to the deck and the pump out fitting.

16
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Note that the wide portion of the handle
is covering the down arrow. The exposed
arrows show the direction of the flow
up.
FLOW UP = DECK PUMPOUT
Note that the wide portion of the
handle is covering the up arrow.
The exposed arrows show the
direction of the flow down.
FLOW DOWN = BOTTOM
DISCHARGE

17
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Cockpit Courtesy Lights
Cockpit Courtesy Lights
The cockpit comes equipped with seven lights: four installed beneath the port and
starboard gunwale boards, two under each gunwale board, one at the forward bow
bulkhead underneath bow filler, two on the forward starboard and port bulkhead. The
cockpit lights are operated by the sixth switch from the left on the console switch panel.
The courtesy lights are operated by the fourth switch and are located on the outboard
sides of the console and the steps leading into the head unit.
Battery Switch Panel
The battery switch panel is located in the console to the left of the mirror. The switch
labeled “HOUSE” is your house battery, and each engine has its own corresponding
switch. Both switches must be turned to the “ON” position in order to fully operate your
boat.
If your engine(s) battery(s) is too low to crank your engine(s), you can turn the engine
switch another quarter turn to the “emergency parallel” setting as denoted by the yellow
area at the 5 o’clock position on the label. This will allow the house and engine batteries
to combine and provide enough power to crank your engine(s). Once the engine is
cranked and on, turn the switch back to the “ON” position so that the engine begins to
charge its battery back up again. Leaving the switch in the “emergency parallel” may
also risk electrical damage
to your accessories and
engine.
When you’re finished using
your boat, turn both
switches to the “off”
position to prevent any
current drain while the boat
is not being used.
Battery Switch Panel

18
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Ladder & Props
Stainless Boarding Ladder
This Cobia model comes standard with a telescoping stainless-steel boarding ladder
integrated into the port aft platform area. This provides a stepping area while the ladder
is in the up position. Once the ladder is down and in the extended position, close the lid
cover for safe and secure entry and exit via the ladder. When washing off your boat at
the end of the day make sure to extend the ladder and wash it off as well, making sure to
dry it completely before stowing. Leaving saltwater in the telescoping tubes may lead to
corrosion and affect the useful life of your ladder.
Props
Prop selection on your Cobia is determined by your local Cobia Dealer, but all props are
based on recommendations from Cobia Boat Company and Yamaha Marine in order to
give your boat maximum overall performance. The needs of your prop will determine
the prop design and size that best fits your performance requirements. Always inspect
DANGER:
No passenger should attempt to enter or exit the boat by
the ladder or by any other means while the engine is on.

19
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
the engine and prop prior to launching
your boat with the engine off. Key prop
issues include tangled fishing line or other
types of debris, cracked blades or fluid
leaking out of the seal. Look for fishing
line tangled around the prop or lower unit
seal. Consult your Yamaha Owner’s
Manual to address these issues.
Steering
Optimus Electronic Power Steering
The key components to the Optimus Electronic Power Steering System (EPS) are the
patented Optimus EPS electronic helm that connects via CAN Bus to a Pump Control
Module (PCM) that operates individual hydraulic pumps. The pumps are connected to
specially engineered electro-hydraulic
“SmartCylinders” that control individual
movement of the outboard engines. The
Optimus EPS system replaces the
traditional hydraulic steering system
without the need for tie bars. Both the
Pump Control Module and the hydraulic
pumps can be found in the in floor lazarette
mounted on the starboard wall. For
additional information regarding Optimus
Electronic Power Steering, see the SeaStar
Owner’s Manual located in your Cobia
Duffel bag.
Engine Props
Optimus EPS System

20
Maverick Boat Group
3207 Industrial 29th St. • Fort Pierce, Florida 34946
(772)-465-0631 •cobiaboats.com
Fuel System
Fuel System
The Cobia 350 CC comes equipped with a 320-gallon fuel cell stationed below the
leaning post between the stringer system. There are two fuel fill receptacles, one on the
port gunwale and one on the starboard gunwale. Every fuel tank is pressure tested at the
factory before and after installation. Should you experience any fuel related problems or
suspect problems with the fuel system, immediately take your boat to a Cobia Dealer.
The primer bulbs are located by the transom gate inside the bilge access hatch.
Self-Bailing Cockpit & Livewell
Self-Bailing Cockpit
The cockpit is designed to be self-bailing, meaning that all the water that comes into the
cockpit will be directly drained overboard. This keeps the boat from acquiring standing
water and allows the boat to drain at all times, including while the boat is docked.
Water drains out of the cockpit through two aft cockpit drains located at the far aft
cockpit floor on both the port and starboard sides. Each side drains overboard through
the side of the hull independently. None of this water is drained into the bilge. Refer to
page 12 for operation of the ball valve associated with this system.
The bilge is designed to drain any water entering the inside of the hull. All hoses are
sealed and double clamped during construction. Continuous or periodic running of the
automatic bilge pump may be an indication of a hose leak or break in a seal and should
be investigated by a Cobia Dealer immediately. Refer to page 11 for further information
regarding bilge pump operation and maintenance.
DANGER:
Do not smoke while filling the tank. Be sure to turn off the engines
and all electrical equipment when fueling the boat to prevent
accidental discharges of static electricity. Use only the
recommended gasoline (see Yamaha Owner’s Manual). Do not
use fuels with alcohol or alcohol related derivatives that can
cause marine fuel system hoses to deteriorate.