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Gavin Scooter User’s Manual and FAQ

By George Irvine

User’s Manual …………………………………………

2 - 10

Frequently Asked Questions (FAQ) Index ………… 11 - 14

Burn Tester Info ………………………………………

15 - 16

Gavin Scooter User’s Manual and FAQ (



George Irvine 2002)

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Summary of Contents for Scooter

Page 1: ...1 Gavin Scooter User s Manual and FAQ By George Irvine User s Manual 2 10 Frequently Asked Questions FAQ Index 11 14 Burn Tester Info 15 16 Gavin Scooter User s Manual and FAQ George Irvine 2002 ...

Page 2: ...eak through the seal and it should never need any kind of servicing whatsoever These are continuous duty electric motors and are highly efficient Any and all questions on your Gavin Scooter should be directed to George Irvine or Pina Porceddu who will relay the question to George and deliver an answer from him George has extensive experience make use of that knowledge base What takes him seconds t...

Page 3: ... sealed it may blow up and that can be extremely dangerous and cause serious injury Battery Charging You will need a 24V Battery Charger to charge your scooter batteries Sears has one with 12 and 25 volt settings gel cell settings fast normal or maintain charge settings an analog ammeter 2 10 or 20 max amp settings etc and it is in a proper case for good ventilation and costs about 80 in the autom...

Page 4: ... wear out and the scooter slow down a little This is because the holes that are used to control the pitch wallow out New blades are 27 per set It takes a while to wear them out I have not personally worn any out but my hard core divers have If there is any other change in performance sound or speed send us the motor immediately without passing go It is either perfect or it is not If not we fix it ...

Page 5: ...s you should ever grease silicone but do not use spray or hydrocarbon sprays as the propellant could ignite later when you start the motor but the main thing is to be sure the O rings are alive and not dead not flat or losing their resilience and that there is nothing on them that would cause them to leak Be sure the lid is all the way down before use When putting the lid on it must go down evenly...

Page 6: ...pe of reed switch you must get from me but that is no problem This one lets you adjust the trigger by turning the reed Relay The relay is a 30 amp relay on a custom made board For replacements either get them from me in one piece or de solder the relay and put on one just like it the part number is on the relay Some relays are just faulty and can mechanically stick but usually if there is a relay ...

Page 7: ...a is to prevent the cone around the seal from reacting with the salt and eating away Eventually this process will leave the seal unable to hold at its edges even if the two seal plates are not damaged Then the whole motor cone has to be replaced which is extremely time consuming An easy way to rinse a scooter is to put it in a fill bin and run it a few seconds with the pitch turned down You can al...

Page 8: ...be no play in the shaft Check and be sure that the ring is in place It is steel not stainless since it needs to be as hard as possible Place the new donut into the hole without any kind of silicone or lubricant Spray the bell side of the seal with lubricant Put a drop of motor oil on the donut Slide the bell down and then press the rubber ring down all around with a flat bladed screwdriver Then ad...

Page 9: ...ve DIR gear configuration if you want to get the most speed use the least current and be the most efficient The length of the tow cord must be such that the scooter is as far out in front of the diver as possible and the diver s right hand is merely relaxed on the right handle and so that the left hand can easily reach the shroud This will allow the full effect of the scooter breaking the water an...

Page 10: ... and do not use that leg as a handle With some of them and more so with the tapered version I have reversed the direction of the magnet so you are pulling it from inside to out to prevent this However it is then harder to operate if broken If the trigger cable jumps or breaks during a dive you may operate the scooter from the wheel by resting your right hand on the shroud strut and holding the mag...

Page 11: ...ce or neutral at the surface You do not want the scooter floating up around you and tangling unless you are diving a sensitive area like a reef where you might be catching lobsters in which case positive will keep the scooter off of the coral However watch out and don t let it get behind you if it is positive Batteries are always slightly different in weight the tube walls always have varying amou...

Page 12: ...d it should hold indefinitely If it does not hold release the vacuum and move the hose to the pressure port on the pump Then pressurize it and stick it underwater to see where the leak is or spray liquid soap on the possible leak areas to find it If it is the plastic send it back to us to be welded If it is the motor seal replace it If it is the o rings replace them If it is the connections which ...

Page 13: ...rinse my scooter after diving in salt water A rinse in fresh water after diving followed by a spray of CRC or WD40 around the area of the seal will do a lot to prevent any problems You do not have to take the props and clutch off merely use the little tube that comes with these cans to spray under the clutch and into that area The idea is to prevent the cone around the seal from reacting with the ...

Page 14: ...th the WKPP clutch you can do this indefinitely If it is sticking on because the magnet is not coming all the way back just pull the magnet back gently with your fingers If the trigger is stuck do the same and then free the trigger Sometimes you need to check the trigger to be sure it is smooth on the outsides The other mechanism of sticking is on is when you get grit in between the wheel and the ...

Page 15: ...00E B The other resistor from above C Heavy wire This means heavier than the wiring used in the scooter itself D The Bracket From Milwaukee Resistor the Part is 301813602STD E Heavy Duty Molded Nylon Connector From Radio Shack Cat No 274 151 Contact Milwaukee Resistor at 414 362 8900 Gavin Scooter User s Manual and FAQ George Irvine 2002 ...

Page 16: ...r meter or you have not done a good job soldering the wiring to the resistors 2 Charge up the batteries 3 Reset your stopwatch 4 Hook up the load and start your watch The resistors will get HOT 5 Measure the voltage while under load When the batteries hit 20 volts under load you are done A short tube Gavin should burn about 50 minutes A long tube Gavin should burn about 95 to 100 minutes Ask Georg...

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