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Author Topic: Mounting the Motors  (Read 1294 times)

DavidNZ

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Mounting the Motors
« on: February 18, 2025, 10:13:50 pm »

back again, with probably another silly question :)
I have cleaned up the mounting spots for my new motors (the previous owner was messy and unskilled) using a Dremel to align the motors until I was happy with them. My question is how do I mount them? I bought two alloy mounting brackets, but I cannot mount them as normal as the old mounts are in the way. Can I mount them with some form of Silicone or like "gunk". I am looking for more ideas from more experienced boaters  ;)

David (boating Boob)
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dougal99

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Re: Mounting the Motors
« Reply #1 on: February 19, 2025, 09:08:21 am »

I use bathroom sealant. A quantity under the motor allows the correct alignment to be achieved by pusinhg the motor into the sealant. It holds the motor in place but with a sharp knife and a twist you easily remove the motor if required.
HTH
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Bunkerbarge

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Re: Mounting the Motors
« Reply #2 on: February 19, 2025, 09:28:57 am »

First I would remove the old mountings.  If they are in the way they have to go.  Dremel, hacksaw blades or chisels should enable you to remove them without too much difficulty.  When you have a clean hull and assuming you don't want to reposition the shaft tubes I would do it this way:


1) Fit the aluminium mountings to the motors.
2) Fit a small ply base to the mountings with small screws.
3) Make a solid brass replacement for the coupling of the same length, accurately drilled to fit the motor shaft and the prop shaft.
4) Mount the hull with the shafts vertical.  This ensures that the weight of the motors will not cause them to sag when fitting.
4) Mix up some car body filler of the David's P.38 type and place a nice dollop in the hull where the motor is to sit.
5) Fit the motor with the solid coupling pushing the ply base into the car body filler and leave to set.
6) When set remove the motor and fill any gaps that you might have around the ply base before refitting the motor with the huco coupling.


Doing them individually means you only need one solid brass coupling but you could make two and do them together.
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Stavros!

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Re: Mounting the Motors
« Reply #3 on: February 19, 2025, 08:01:54 pm »

Neil our lifeboat guru swears by blutack es you did read it correctly........must admit i have never tried it but it seems to work for him




Stavros
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chas

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Re: Mounting the Motors
« Reply #4 on: February 19, 2025, 11:16:08 pm »

Hi david, i use a similar method to Dougal. I make a little plasticard box that fits around the motor, put some silicone sealant in and push the motor in. I then connect a low voltage to the motor, with it coupled to the shaft. I then adjust the motor until its running sweetly, and let it set. One advantage is near silent running with no play in the mounting. If the motor needs replacing it comes out without much fuss.
    One model now over 30 years old is on its third motor in the same mount, it just works without any problems, and is particularly good in plastic hulls that can reverberate.
  If you do this, make sure not to get silicone over or in the holes / slots in the motor casing, and make sure the area under the motor is clean and grease free before starting.
 Chas

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Neil

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Re: Mounting the Motors
« Reply #5 on: February 24, 2025, 10:33:49 pm »

believe me or not, but i use blutac to mount my motors, and have never had one come off its bed yet. the warmer the motor gets, the stickier and grabing the bluetac becomes, and very easy to remove.

in fact i mount all my radio gear except servos which are placed in servo boxes, on bluetac and far quicker to get the rc gear out quickly if you have a leak,
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Martin (Admin)

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Re: Mounting the Motors
« Reply #6 on: February 26, 2025, 03:03:18 pm »

 
                :o
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DavidNZ

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Re: Mounting the Motors
« Reply #7 on: February 26, 2025, 08:02:22 pm »

believe me or not, but i use blutac to mount my motors, and have never had one come off its bed yet. the warmer the motor gets, the stickier and grabing the bluetac becomes, and very easy to remove.

in fact i mount all my radio gear except servos which are placed in servo boxes, on bluetac and far quicker to get the rc gear out quickly if you have a leak,
As long as it works  :embarrassed:
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Neil

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Re: Mounting the Motors
« Reply #8 on: February 26, 2025, 08:54:28 pm »

has worked every time with me as long as you get it warm to begin with and use plenty of it.
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