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M a v e r i c k   B o a t   C o m p a n y ,   I n c .     •   3 2 0 7   I n d u s t r i a l   2 9 t h   S t .   •   F o r t   P i e r c e ,  

F l o r i d a   3 4 9 4 6   •   ( 7 7 2 ) - 4 6 5 - 0 6 3 1   o r   ( 8 8 8 ) - s h a l l o w   •   F a x :   ( 7 7 2 )   4 8 9 - 2 1 6 8

FUEL-WATER SEPARATOR & DRAIN PLUG

Fuel/Water Separator (above)

Fuel-Water Separator

A Yamaha Fuel - Water Separator is installed 
between the fuel tank and engine on your 21 
Bay model. 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 hight humidity where water in fuel supplies is a 

problem or extensive engine operation occurs, more frequent replacement may be necessary. 

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 to 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 
you 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. 

Refer 

to page 9 

of this Owner’s Manual for information on your 

boats bilge system. 

Summary of Contents for 2012 Cobia 21 Bay

Page 1: ... 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 ne...

Page 2: ... 11 Cockpit Courtesy Lights 12 Props 13 Head Waste System 13 Fuel System 14 Self Bailing Cockpit 14 Livewell System 15 Rod Lockers 16 Forward Storage 16 Anchor Locker Rode Storage 17 217 Aluminum Plate Location 17 Specifications 18 Wiring Color Codes 19 20 217 Hull Wire Harness 21 217 Deck Wire Harness 22 Optional Cockpit Bolsters 23 Optional Bow Cushion Set 23 Optional Rear Seating with Backrest ...

Page 3: ...ontrolled or unattended operation Certain emergency conditions e g turbulent water wakes accidental shove 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...

Page 4: ...ommends 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 hight humidity where water in fuel supplies is a problem or extensive engine operation occurs more frequent replacement may be necessary Garboard Drain Plug The garboard drain plug is the small metal plug located at the lowest point o...

Page 5: ...come illuminated These lights confirm whether the accessory is on or off in low light situations Below each switch is a breaker if an accessory does not come on when the switch is in the ON position first attempt to reset the breaker by pressing in on the white boot Instrument Panel The instrument panel on your 21 Bay is composed of three Faria Analog Gauges These gauges all serve different purpos...

Page 6: ...the light is moved to the starboard aft deck The console also houses a glove box shifter throttle levers key switch panel with lanyard stainless dual cup holder compass horn navigational lights cockpit courtesy lights and two 4 bank rod holders It will also house the optional trim tab switch panel This boat comes with Sea Star hydraulic steering helms The console for the 21 bay also comes with a 4...

Page 7: ...eived a Duffel Bag with your new 21 Bay Cobia Inside the Duffel Bag are the following items Large Livewell Standpipe Short Livewell Standpipe 1 5 Livewell Pacifier Plug 2 ignition Keys and Emergency Kill Cord Engine Stop Lanyard Yamaha Engine Owner s Manuals Engine Start Cord Various Appliance and Accessories Manuals 21 Bay Layout Bow Pop Up Cleat Anchor Locker Center Bow Locker Starboard Bow Lock...

Page 8: ... the water and see your local Cobia dealer to have the bilge area inspected for possible leaks Fuel leaks also require immediate attention Be sure to check for fuel leaks frequently and repair any problems immediately Any replacement of parts or repairs to the fuel system should be performed by a trained marine mechanic See your authorized Cobia dealer for parts and repair Use bilge cleaner produc...

Page 9: ...kdrain 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 ...

Page 10: ... l l o w F a x 7 7 2 4 8 9 2 1 6 8 COCKPIT COURTESY LIGHTS Cockpit Courtesy Lights The cockpit comes equipped with two LED courtesy lights installed at the factory The courtesy lights are mounted on the port and starboard sides of the console These lights illuminate the entire cockpit and are controlled by the switch labeled courtesy lights on the switch panel located above the steering helm ...

Page 11: ...p 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 s Owner s Manual to address these issues No passenger should attempt to enter or exit the boat by the ladder or by any other means while the engin...

Page 12: ... is on the port gunnel 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 CAUTION 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 ...

Page 13: ...n 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 9 for further information regarding bilge pump operation and maintenance Livewell System The livewell system on the 21 Bay is designed to keep your baitfish alive and strong for as long as possible With this cool ...

Page 14: ...ard with two 4 bank rod holders attached to the console Port and Starboard Storage and Rod Lockers The 21 Bay has port and starboard storage compartments in the bow These lockers have the ability to safely store rods and various tackle The lids are made with a unique two part mold process that results in a lighter part with a primary finish on both sides without any loss of strength These two part...

Page 15: ...ocker hatch pictured below There is an eye mounted to the bow eye to secure your anchor rope or chain to After you set your anchor the excess rope can stay stored in the locker and you can close the door by aligning your rope to the notch supplied in the deck Phenolic Plate Location Your Cobia 21 Bay comes standard with phenolic plates laminated into the cockpit floor These plates secure the leani...

Page 16: ...le battery system the battery is wired to the number 1 side of the switch A dealer installed option would be a Dual Battery Setup On the dual battery setup one battery is wired to the number one position while the second battery is wired to the number 2 side of the switch The operator can choose which battery to utilize by the selection on the switch The only time the switch should be in the 1 2 p...

Page 17: ...M o d e l Y e a r 2 0 1 2 17 ...

Page 18: ...been mentioned earlier in the Owner s Manual The following pages will refer to the remaining options Trolling Motor Trolling motors come as an option for the 21 Bay and are a great addition to any anglers tool box Refer to the diagram below for optional trolling motor system with battery charger and wire routing ...

Page 19: ...ff with an internal pressure switch and will switch itself back on as you demand water Be careful to only spray gel coated fiberglass surfaces with saltwater and avoid all other areas Always rinse your boat with freshwater as soon as you return to the dock or home if the boat is being trailered Raw Water Receptacle Optional Gauges Two Yamaha Multifunction Digital Gauges are a possible upgrade opti...

Page 20: ...the starboard bow Raising the starboard trim tab lowers the stern on the starboard side thus raising the port bow Use the tabs to adjust the attitude of the boat so that it sits evenly and to raise or lower the bow to control running performance Pushing on the top of the switch down will lower the trim tab and force the bow down which is important when running in heavy seas or a stiff chop In most...

Page 21: ...ption for the 21 Bay boat is a bimini canvas top easily erected and removed with quick disconnects which make setting up the bimini top even easier The canvas can also be adjusted fore and aft by loosening the hinges on the poles and putting them in the desired location ...

Page 22: ...ing information is general in nature and should not be considered a repair manual or guidelines set forth by Cobia Boat Company Cleaning Each Cobia Boat is constructed using the finest material and components available However no material is immune to the ravages of the saltwater environment After each use your boat should be rinsed thoroughly with fresh water A mild detergent may also be used to ...

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