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Defender Inflatables – Operation, Maintenance & Warranty Manual 

Page 12 of 16 

bolt your engine to the transom (consult your 

engine supplier). 

 

 At all speeds, it is advised to keep the boat 

LEVEL. Prevent the bow from rearing upwards and 

prevent the bow from pointing DOWN towards the 

water. 

 

Use the weight of the people on board to 

achieve the level position. 

 

Adjust your engine angle (see below). 

 

REMEMBER:

 

 

 

 

 

 

An outboard tilted too far from the transom 

will drive the boat with a bow up attitude, 

which is both very dangerous and inefficient. 

 
 

 

 

 

An outboard tilted too close to the transom will 

drive the bow section too deep into the water, 

which ends up in loss of speed and/or 

cavitation.  

 

1. Occasional checks should be made of motor 

attachment screws. Loose screws will cause erratic 

boat operation and possible loss of engine 

overboard. 

2. Make a thorough review of the motor’s 

operator’s manual before operation. 

3. On board loads should be monitored to avoid 

chaffing or puncturing of boat skin. 

 

Turning the boat

 

When taking a sharp turn, reduce the speed of your 

boat. The boat will tilt considerably in the direction 

of the turn.  

3.3 Hazards 

 

Water hazards 

1. Wrecks, reefs, rocky shores, sand bars, and 

shallows should be avoided or approached with 

caution. 

2. When boating in unfamiliar waters, obtain 

information on local water hazards before 

launching. 

3. BEWARE OF OFFSHORE WINDS AND 

CURRENTS. 

 

Air chamber failure 

Your Defender Inflatable boat is designed with 

more than one air chamber.  In the event of a 

puncture in one chamber, the boat will retain at 

least 50% of its buoyancy. Shift the load in the 

craft to the opposite side. Secure the leaking 

chamber as necessary (by tying-up or holding-up) 

and immediately proceed to the nearest shore or 

mother ship, whichever is nearest. 

However, be careful about shallows or reefs 

because they can scratch or further damage your 

boat. 

 

Beaching 

It is recommended that the boat NOT be powered 

onto the beach, dragged across rocks, sand, gravel 

or pavement as damage to the boat skin may result. 

This damage is not covered by your warranty. 

 

Davits 

If the boat is suspended on davits, open the drain 

plug so that no water can accumulate in the boat. 

 

Drain plug (RIB Models) 

The RIB is equipped with a hull drain plug, which 

should be in place when launching. The deck drain 

plug or slide bailer should be removed/opened only 

when the boat is under power in forward motion or 

when the boat is stored out of the water on davits or 

boat storage racks exposed to rain and water. 

 

Sunlight 

Avoid extended exposure to sunshine. The 

changing air pressure inside the tubes might cause 

damage to your boat.  Extreme sunshine (ultra-

violet rays) over a longer period may accelerate 

aging of the materials. 

Routinely clean the fabric and then apply UV 

protectant products to extend the life of your boat.  

Cover the boat to block direct sunlight exposure if 

the boat is to be stored for extended periods of 

time. Do not use products containing petroleum or 

silicone.  

Defender Inflatables – Operation, Maintenance & Warranty Manual 

Page 13 of 16 

 

Smoking 

Do not smoke while operating your craft.  

Especially while refueling.  In fact, just quit. 

 Portable fuel tanks should be placed on a 

cushioned pad and should be strongly secured to 

the craft by means of straps to avoid bumps and 

risk of breaking during navigation. 

- When refueling, always stick to the following 

recommendations: 

- If possible, remove portable tanks from the craft 

to refuel. 

- Refuel the tanks in the open air, far from heat 

sources, sparks or flames. 

- Do not fill the tanks to the brim. The fuel 

increases volume with a rise in temperature and 

there is a possibility of the tank overflowing or 

even breaking.  

- If fuel is spilled on the boat, clean or remove 

immediately or damage may occur to the fabric  

 

High altitude use 

Normal full inflation pressure–is 3.6 psi (.25 bar). 

If boat is inflated at sea level (low altitude) and 

transported to a high altitude (i.e., for use in a 

mountain lake) the air pressure must be reduced at 

the higher altitude to prevent over inflation. 

 

Swimming

 

 

 

DANGER

 

Stop the propeller of your outboard engine when 

people are swimming close to your boat. The 

propeller can be extremely dangerous to anyone 

or anything in the water. 

Stop the outboard motor immediately if you 

spot swimmers in the vicinity of your boat.

 

4. Maintenance 

4.0 

General maintenance 

Cleaning agents. 

Household cleaners should be used sparingly and 

not discharged into waterways. Never mix cleaners 

and be sure to use plenty of ventilation in enclosed 

area. DO NOT use strong detergents, solvents or 

products, which contain phosphates, chlorine, 

solvents, non-biodegradable or petroleum-based 

products. Cleaning your Defender Inflatable boat 

can best be done with inflatable boat cleaner.  

Always rinse well and follow with a UV protectant. 

DO NOT pressure wash tubes. 

 

Paints. 

If your boat is kept in water where marine growth 

is a problem, the use of anti-fouling paint may 

reduce the growth rate. Be aware of environmental 

regulations that may govern your paint choice. 

Contact your local boating authorities for 

information. 

 

Fiberglass hulls should be regularly washed to 

remove dirt and polished with wax to protect the 

gelcoat surface. 

 

 NOTE

 

IMPORTANT: 

Waxes or cleaners containing 

alcohol or hydrocarbons SHOULD NOT BE USED 

on the boat fabric. These products will prematurely 

dry out or damage the boat fabric. 
 

Page 12  www.defender.com

Summary of Contents for 380

Page 1: ...Defender Inflatables Operation Maintenance Warranty Manual Defender RIB 265 300 Defender 380 430 470 Defender RIB 430 460 ...

Page 2: ...able 8 2 8 2 2 Towing of a RIB 8 Page Contents 3 Safety and operation information 3 0 Important safety information 9 3 1 Pre operating checklist 10 3 2 Stability and buoyancy 10 3 2 1 Position of persons and luggage 10 3 2 2 Rowing 10 3 2 3 Under engine power 10 3 3 Hazards 12 4 Maintenance 4 0 General maintenance 13 4 1 Repairs 14 4 1 1 Small repairs 14 4 1 2 Air leak in tube by cut 14 4 2 Winter...

Page 3: ...tion that will occur over time and as a result of heavy use misuse or negligence of the craft Any craft no matter how well built and strong can be severely damaged if not used properly Improper boat handling is also unsafe for other boaters Always adjust the speed and direction of the craft to sea conditions The craft should have onboard the appropriate USCG required safety equipment lifejackets f...

Page 4: ...wn overboard or into the boat Never be under the influence of alcohol or drugs while boating it is the law Alcohol or drug use impairs your judgment and greatly reduces your ability to react quickly Prepare other boat operators Instruct at least one other person on board in the basics of starting and operating the outboard and boat handling in case the driver becomes disabled or falls overboard Pa...

Page 5: ...ey in a clockwise position to tighten the valve If this does not stop the air loss turn counterclockwise to remove valve Inspect the valve for damage dirt or grit Reinsert valve into valve nut and tighten If air leakage persists contact Defender Industries for assistance Tel 800 628 8225 Often we can troubleshoot valve issues over the phone or by shipping you a new air valve Valves should be routi...

Page 6: ...ghtly secured as they the final seal in ensuring air tightness NOTE Never surpass these values Inflate the boat to 0 25 bar 3 6 PSI Inflate the keel to 0 40 bar 5 8 PSI Inflate the Air Floor to 0 76 bar 11 PSI 2 4 Floorboard installation Instructions to install the floorboards in the Defender aluminum floor models 380 430 470 Inflate the tube chambers enough to have some shape to the boat Make sur...

Page 7: ...egions 2 6 Deflation General information NOTE Boat should be clean and dry before rolling up for storage Remove any sand and debris that may cling to the fabric When deflating the boat deflate all chambers evenly this prevents damage to the baffles in the boat To deflate the boat Put your finger in the valve and turn turn See for operation of the valves section 2 2 the valves Release the air from ...

Page 8: ...nsafe speed may void your warranty 2 8 2 1 Towing of an inflatable NOTE IMPORTANT The bow lift handle should never be used for towing Use the port and starboard D rings for towing Towing this way makes the boat steady and secure behind the towing boat and helps to avoid damage to your Defender Inflatable boat Attach the towing ropes as in the following scheme Attach a line between the towing rings...

Page 9: ...ck of the seat or gunwale at planing speeds standing at planing speeds sitting on elevated fishing boat decks operating at planing speeds in shallow or obstacle infested waters releasing your grip on a steering wheel or tiller handle that is pulling in one direction drinking alcohol or consuming drugs or daring high speed boat maneuvers While activation of the lanyard stop switch will stop the eng...

Page 10: ...oard and readily accessible Check that the oars or paddles are in the boat in case of engine trouble Operator knows safe navigation boating and operating procedures A ring type life buoy or buoyant cushion designed to be thrown to a person in the water Arrange passengers and load in the boat so that the weight is distributed evenly and everyone is seated in a proper seat or on the floor Instruct a...

Page 11: ...for an instant This will bring the boat to a nearly instantaneous stop and can send the occupants flying forward The boat may also steer sharply to one side When accelerating with the boat the bow can make an upward movement This might limit the sight of the helmsman temporarily When the speed of the boat increases the boat will come on plane and return to a level position again If the wind blows ...

Page 12: ...ure Your Defender Inflatable boat is designed with more than one air chamber In the event of a puncture in one chamber the boat will retain at least 50 of its buoyancy Shift the load in the craft to the opposite side Secure the leaking chamber as necessary by tying up or holding up and immediately proceed to the nearest shore or mother ship whichever is nearest However be careful about shallows or...

Page 13: ...ard engine when people are swimming close to your boat The propeller can be extremely dangerous to anyone or anything in the water Stop the outboard motor immediately if you spot swimmers in the vicinity of your boat 4 Maintenance 4 0 General maintenance Cleaning agents Household cleaners should be used sparingly and not discharged into waterways Never mix cleaners and be sure to use plenty of ven...

Page 14: ...er the damaged area and trace with a pencil the outline of the patch If the fabric of your boat is CSM you have to buff roughen with sandpaper the patch area on the boat as well as the backside of the patch PVC need not be buffed for repair Use care when sanding the surface around the puncture and the patch Lightly scuff with the sandpaper evenly Avoid sanding so roughly that the thread of the fab...

Page 15: ...oat during storage 5 If you store your boat for a longer period do not keep the boat in the delivered factory carton The boat is folded tightly in the original shipping package which gives sharp folds in the material Roll or fold up the boat loosely and store it on a dry place away from rodents or pests that can damage the fabric To avoid damaging the boat during storage do not place heavy objects...

Page 16: ...preparing for racing or other competitive activity G Acts of God including but not limited to abnormal water wind or weather conditions etc H Damages or corrosion due to lack of maintenance or premature wearing resulting from improper assembly over under inflation etc I Operation of product in a manner that is contrary to this manual or in violation of federal or state laws III This warranty does ...

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