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Old 12-23-2021, 07:15 PM   #1
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sidepower bow thruster wrong direction

I got my boat launched today after some work that included changing the prop zincs on the thrusters. After launch i tried the bow thruster and it went the opposite direction .The display is correct and if i used the dock hold feature the boat does a 360. Is there a right and left hand prop? The yard wont call me back or respond to emails so i figured i would use the forum.
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Old 12-23-2021, 07:57 PM   #2
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I got my boat launched today after some work that included changing the prop zincs on the thrusters. After launch i tried the bow thruster and it went the opposite direction .The display is correct and if i used the dock hold feature the boat does a 360. Is there a right and left hand prop? The yard wont call me back or respond to emails so i figured i would use the forum.
i wish i had the answer to that. it seems likely the yard didn't assemble it correctly. are these electric or hydraulic?
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Old 12-23-2021, 08:17 PM   #3
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You can reverse the direction by swapping the control wires. I donít remember the colors of the wires though.
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Old 12-23-2021, 08:19 PM   #4
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Thinking out loud,and expecting a resounding NO! from the learned, could you temporarily reverse the connections at the control unit?
I remember this reversal happened to another boat represented on TF, unfortunately the member very rarely posts.
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Old 12-23-2021, 08:21 PM   #5
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I had the same problem last spring after installing a new controller. I called them, you need to swap out two wires. Very simple to do. I just remember that one of the wires was blue and I can not remember the other. Call them
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Old 12-23-2021, 08:25 PM   #6
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did get an email from the yard and he believes they got the props reversed when they did the zincs. The props were cleaned but i didn't think they took them off when they installed the new zinc.
His solutions are to either swap the props or reverse the wiring at the motor. Were heading into a week of below freezing so i will take the issue up later. I didn't know the props were different.
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Old 12-23-2021, 08:29 PM   #7
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I donít remember taking the props of the Sidepower thruster on our last boat to change the anodes. But when I installed it it dod thrust backwards so I just swapped the control wires, maybe a blue and gray.
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Old 12-23-2021, 08:44 PM   #8
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I would have thought they would have just removed the bolt holding on the anode.
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Old 12-23-2021, 08:50 PM   #9
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You can change zincs w/o removing props but the zinc bolt is what also holds the props on.
I didn't think its possible to get the props reversed as they are identical... no port / stbd.
I dont know if its possible to install the props incorrectly... whatvshould be the outside turned towards the center line but that may be possible??
If old style props only one side engages the shear pin
If new style there is a splined adapter that engages the shear pin and the prop mounts to the adapter...
Reversing + t - wires seems like the easiest unless the boatvisbout of the water.
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Old 12-23-2021, 09:09 PM   #10
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Quote:
Originally Posted by magna 6882 View Post
I got my boat launched today after some work that included changing the prop zincs on the thrusters. After launch i tried the bow thruster and it went the opposite direction .The display is correct and if i used the dock hold feature the boat does a 360. Is there a right and left hand prop? The yard wont call me back or respond to emails so i figured i would use the forum.
This is a thing! A friend had them removed during a normal bottom work (paint etc). When they splashed him, he tested the bow thruster and it was reversed. They immediately pulled him out for a quick haul-n-hang, switched the props and dropped him back in.

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Old 12-23-2021, 10:02 PM   #11
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It would be easier to switch the control wires than do a haul out. 5 minutes and a couple of butt connectors. If memory serves there are 4 wires to the control from the thruster, +,-, left and right. Just swap the left and right wires and you are good to go.
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Old 12-23-2021, 10:39 PM   #12
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It would be easier to switch the control wires than do a haul out. 5 minutes and a couple of butt connectors. If memory serves there are 4 wires to the control from the thruster, +,-, left and right. Just swap the left and right wires and you are good to go.

I agree it would be an easier fix but i am still left with the question what did they do wrong and is what they did wrong sustainable. I do not know enough about the sidepower props. Are they intended to be reversible and how are they keyed or splined? The props must have been removed for the bottom paint and either swapped side to side or installed backwards. One way or another before being put back into service i need to confirm the props are not going to come loose ,damage the boat or damage the shafts.
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Old 12-23-2021, 10:44 PM   #13
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I agree it would be an easier fix but i am still left with the question what did they do wrong and is what they did wrong sustainable. I do not know enough about the sidepower props. Are they intended to be reversible and how are they keyed or splined? The props must have been removed for the bottom paint and either swapped side to side or installed backwards. One way or another before being put back into service i need to confirm the props are not going to come loose ,damage the boat or damage the shafts.
I have to agree. There's no way I'd let that go without either expert confirmation that it's good, or haul and check.
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Old 12-23-2021, 11:17 PM   #14
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In reading the manual the propellers have two part numbers and the propellers are marked LH and RH with LH on port side. This is also based on the gear housing being installed in the correct orientation. I see two possibility's.
1)The yard installed the props in the correct orientation and the boat builder set the gearbox backwards.
2) The yard screwed up and reversed the props.
I do need to confirm which one for future work and get it in the logbook.



It looks like the sheer pin is typical on a straight shaft so likely nothing wrong there.
Sidepower SEP170
I will know to check this on any future maintenance.The learning curve on this stuff is getting expensive. Hope these threads help others.
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Old 12-24-2021, 02:41 AM   #15
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Originally Posted by magna 6882 View Post
I got my boat launched today after some work that included changing the prop zincs on the thrusters. After launch i tried the bow thruster and it went the opposite direction .The display is correct and if i used the dock hold feature the boat does a 360. Is there a right and left hand prop? The yard wont call me back or respond to emails so i figured i would use the forum.
Hi, I think you'll find your props are handed. I've done it myself when re-assembling my Side Power bow thruster, much to the amusement of the launch engineers!

The props are created to be mounted on the port or stbd side. Putting them on the wrong sides makes them work back to front. Easily done.
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Old 12-24-2021, 05:18 AM   #16
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On mine, I just had to move two wires on the back of the joy stick. No butt connectors needed. But maybe it depends on what model you have.
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Old 12-24-2021, 06:53 AM   #17
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Sidepower anodes can be hard to shift. Last time I changed mine I ran an 8mm tap through the 7mm bored centre of the new anodes. The 6mm fixing bolt and washer still works OK.
When they need changing next, screwing an 8mm bolt into the threaded anode should just pop it off.
I hope so anyway!
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Old 12-24-2021, 07:21 AM   #18
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IMTRA is the US distributor and has great phone support.
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Old 12-24-2021, 08:44 AM   #19
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IMTRA is the US distributor and has great phone support.
Yes they do. When I called the wait time was just 2 or 3 minutes and the tech knew who to fix my problem off the top of his head.
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Old 12-24-2021, 09:21 AM   #20
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I got my boat launched today after some work that included changing the prop zincs on the thrusters. After launch i tried the bow thruster and it went the opposite direction .The display is correct and if i used the dock hold feature the boat does a 360. Is there a right and left hand prop? The yard wont call me back or respond to emails so i figured i would use the forum.

By now you have gotten several suggestions on what to do. IMHO changing the wiring seems to be the easiest and least expensive thing to do now. BUT if and when, more when, you have the props removed again and that person KNOWS what he is doing, he puts them back on correctly. Now you'll have to reverse the wires again. If the props are truly left and right handed, getting them off and back on correctly would be the best approach.
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