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Old 06-21-2018, 08:30 PM   #1
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Post 3700 sy...Bow Thruster

I recently bought a 2007 3700 SY and I would like to install a bow thruster. There is a tunnel preinstalled for this purpose but I do not know the diameter or much of anything about brands, recommendations or size. It seems to me that Maxum must have had something in mind when they put the tunnel in the mold. Can someone give me some insight into this project. Thanks.
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Old 06-22-2018, 12:28 AM   #2
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I am not fimilar with this model and would be surprised if the tunnel is factory. If you measure itís diameter you should be able to look up thrusters to see which ones use this size.
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Old 06-22-2018, 02:26 PM   #3
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I've never seen a tunnel installed without a bow thruster.

Sidepower is one of the most popular brands of thrusters.

SE60: 29 -38 ft boats
SE80: 35 -48 ft boats

The size of the thruster is really dictated by the size of the boat. Compare prop sizes and determine if either will fit in the prop shaft you have installed.
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Old 06-22-2018, 03:04 PM   #4
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Default 3700 SY...Bow Thruster

Thanks to all. When I had the boat surveyed, I was told that the tunnel was a part of the mold design at that time. It seems that Maxum was getting enough requests for thrusters that they included the tunnel for future retrofit or factory installation. I'm not sure if this is the case but it does make sense. At any rate, I was contacted by an installer and he said he had done the job before and quoted a Vetus, Bow 75 and gave a reduced cost due to the existing tube. The job is guarenteed for as long as I own the boat. As far as I can tell, this is a good project quote. Any further thoughts? Jim
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Old 06-22-2018, 07:37 PM   #5
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As long as you are ok with the price that seems like a good way to go.
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Old 06-26-2018, 01:49 PM   #6
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Vetus is a popular aftermarket company. They sell a wide variety of products. I'm not sure if they actually manufacture bow thrusters, or have them manufactured with their name on it. They have a solid reputation.
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