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 GM10 Mod 
How to modify a GM10 from a 81:1 ratio to a 9:1 ratio.
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transpixel Picture of a stock GM10 motor. transpixel
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transpixel Step 1. Remove the mouting horn and spring transpixel
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transpixel Step 2. Remove the front plate. transpixel
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Picture of a stock GM10 motor.
Viewed: 685 times.
Step 1. Remove the mouting horn and spring
Viewed: 535 times.
Step 2. Remove the front plate.
Viewed: 538 times.
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transpixel Step 3. Carefully remove the gears, don't drop any! watch that the steel pinion doesn't fall out. Note: The pinion on the output gear is in fairly tight so it will come out with the gear. transpixel
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transpixel Step 4. Put one of the gears back but put it in facing down. This is just to provide a spacer for the next gear. transpixel
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transpixel Step 5. Put a second gear on top of the first gear, this time facing upwards. transpixel
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Step 3. Carefully remove the gears, don't drop any! watch that the steel pinion doesn't fall out. Note: The pinion on the output gear is in fairly tight so it will come out with the gear.
Viewed: 539 times.
Step 4. Put one of the gears back but put it in facing down. This is just to provide a spacer for the next gear.
Viewed: 553 times.
Step 5. Put a second gear on top of the first gear, this time facing upwards.
Viewed: 568 times.
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transpixel Step 6. Add the output shaft. transpixel
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transpixel Step 7. Put the front plate back on so the gears don't fall out. Here you may notice that the motor gear does not mesh with the rest of the gears. transpixel
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transpixel Step 8. Take out the motor. transpixel
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Step 6. Add the output shaft.
Viewed: 514 times.
Step 7. Put the front plate back on so the gears don't fall out. Here you may notice that the motor gear does not mesh with the rest of the gears.
Viewed: 559 times.
Step 8. Take out the motor.
Viewed: 562 times.
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transpixel Step 9. Move the gear up on the motor shaft with a knife or small flat head screwdriver. transpixel
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transpixel Step 10. Put the motor back in. Notice how the motor gear now meshes with the other gears. transpixel
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transpixel Step 11. You can cut off the plastic stops with a pair of side cutters to allow the motor to spin 360 degrees. You will be left with one extra gear so keep it or feed it to your fish, whatever works for you. transpixel
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Step 9. Move the gear up on the motor shaft with a knife or small flat head screwdriver.
Viewed: 600 times.
Step 10. Put the motor back in. Notice how the motor gear now meshes with the other gears.
Viewed: 655 times.
Step 11. You can cut off the plastic stops with a pair of side cutters to allow the motor to spin 360 degrees. You will be left with one extra gear so keep it or feed it to your fish, whatever works for you.
Viewed: 675 times.
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