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Old 12-19-2012, 02:38 PM   #61
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Guess
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If you can't repair it maybe it shouldn't be on the boat
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Old 12-19-2012, 02:57 PM   #62
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My wife has a very simple way of remembering what shifter does what with our twin. She envisions moving the shifters as moving her whole body. So right shifter back, left one forward swings her butt (stern) to the left. Left shifter back, right one forward swings her butt (stern) to the right.

I was taught to treat the shifters like the steering controls on an older-style bulldozer. One shifter forward, the other in neutral, boat pivots slowly away from the forward shifter. One shifter forward, the other in reverse, boat pivots rapidly away from the forward shifter.
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Old 12-19-2012, 03:38 PM   #63
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Originally Posted by Pau Hana View Post
We're contemplating one of these:

Yacht Thruster - Bow and Stern Thrusters Applications


Seems perfect for a DIY project, and I like the idea of a small hole in the boat vs the traditional tube. The company touts the exposed motor has extended run time due to the cooling action of the surrounding water.

Last time I checked pricing it was in the neighborhood of 5K (including haulout for the unit install). The haulout can be a haul and hang vs blocked.

Opinions?
wow that is a great idea. Reading the install instructions it requires mounting in the exact center of bottom. Dosent this mean you will need a 2.5' hole drilled through the keel? That scares me a bit.
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Old 12-19-2012, 06:46 PM   #64
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With the rudder amidships in close quarters, you drive a twin screw like you push a shopping cart.
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Old 12-19-2012, 07:12 PM   #65
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With the rudder amidships in close quarters, you drive a twin screw like you push a shopping cart.
Absolutely hate those shopping carts with four-wheels able to all swivel.
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Old 12-19-2012, 07:24 PM   #66
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Yacht Thruster Brand

I recently got a quote for a Simplex 300 (larger of the single prop models), thinking to use it as a stern thruster as we already have a Vetus bow thruster. The cost was going to be just shy of $8k, not including the batteries to power it. We were going to install it our self so that price is for hardware only, which I did not think was out of line, all things considered.
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Old 12-19-2012, 08:41 PM   #67
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Quote:
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With the rudder amidships in close quarters, you drive a twin screw like you push a shopping cart.
Great analogy Don.
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Old 10-30-2014, 02:06 AM   #68
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It seems like that would be pretty inefficient at high power. And pretty expensive. Would two 12 volt batteries in series have been an option?

Old thread I know but .............

An inverter chamges DC to AC so is not applicable in this situation.

Two 12volt batteries can be connected with a series/parallel switch ( just a large solenoid) available from any farm equipment outfit for about $150. Many tractors start on 24volts and run everything else on 12volts.

This switch allows you to charge the batteries independently from a 12volt alternator (or charger) and is wired into the joystick to engage both batteries for 24 volt output.

Vetus also makes a series/parallel switch but last time I checked it was $1500 and not as robust as the one from the tractor shop.
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Old 10-30-2014, 06:41 AM   #69
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Bow Thruster vs Stern Thruster

That's how our stern thruster is setup. When I press the on button at the helm it isolates the two 8D's from the buss then it puts them in a series so I can get 24v.

Here's what it looks like.Click image for larger version

Name:	ImageUploadedByTrawler Forum1414669272.323579.jpg
Views:	148
Size:	95.4 KB
ID:	33992
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Old 10-30-2014, 07:05 AM   #70
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A bow thruster is more desirable. Both is better. Hydraulic motors usually require you run your generator when you need to use them. If the main engine is used, there is the need for more RPMs. When you are docking at idle speed you may not have enough power for the pump. I would go with a good quality electric (constant run) motor, dedicated battery bow thruster. Then save your money and add a stern thruster next year, if needed.

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Old 10-30-2014, 07:13 AM   #71
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That's how our stern thruster is setup. When I press the own button in the helm it isolates the two 8D's from the buss then parallels the two 8D's so I can get 24v.

Here's what it looks like.Attachment 33992

Series. the new circuit is series. parallel doubles Amperage.
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Old 10-30-2014, 07:14 AM   #72
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Bow Thruster vs Stern Thruster

Quote:
Originally Posted by eseyoung View Post
Series. the new circuit is series. parallel doubles Amperage.

Yep, sorry one eye is still closed!!
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Old 10-30-2014, 07:27 AM   #73
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Old thread I know but .............

An inverter chamges DC to AC so is not applicable in this situation..
I know that, I was responding to someone else's post.
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Old 10-30-2014, 09:17 AM   #74
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With the rudder amidships in close quarters, you drive a twin screw like you push a shopping cart.
Full of cold beer?
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Old 10-30-2014, 09:38 AM   #75
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Until my current boat, I hadn't had a bow (or stern) thruster, but didn't feel like I needed it (even on a 55' boat) and considered it more of a crutch for those not skillful enough to maneuver a twin engine (single engine is a whole different story) boat.
With my current boat, I use the bow thruster all the time. Kind of reminds me of the scene from indiana Jones where he is fighting the 10th consecutive sword-bearing muslim using only his whip. Finally indianna just pulls out his gun and shoots the guy. Like using a gun in a sword fight, using a thruster certainly makes challenges easier.
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Old 10-30-2014, 09:44 AM   #76
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stern thruster.

Curt, I have a MS1 single eng. last winter I installed a lewmar 185tt thurster on my boat. The reason I went the stern was cost,$8500 from northeast thruster. This was a DIY job just cut big hole! BEST $3500 I ever spent on this boat . backs out , backs down ,& spins around in her own length. Would a bow thruster be cool too,sure,but right now I don't see the need for it. Everyone in my marina was amazed how good it works! BUT, make sure you can get the thruster down deep enough in the water,if not all you will do is suck air. If you look at a VETUS systems ,they make bolt on thrust diverters . you will most likely need them. Hydraulic is no doubt more dependable,if you already have a pump & stuff, but elect. is fine. Good luck, Rich.
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Old 10-30-2014, 11:46 AM   #77
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My experience with thrusters. Two(bow & stern) are better than one and pair that with twins and you can maneuver with the IPS boats.
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Old 10-30-2014, 12:02 PM   #78
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Eyschulman,
I agree but in keeping w the OP I'd say stern. One can back straight w a stern thruster and that's about the only time I need more control w Willy. Backing out of slips or into them but the one time I'd really would like one is backing down on an anchor in the wind.
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Old 10-30-2014, 03:00 PM   #79
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Full of cold beer?
Not for long with me around
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Old 08-18-2016, 10:33 AM   #80
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Talking Bow Thruster

I had a bow and stern thruster installed on my Mainship 390, Docking by Control did the stern. Danny did an awesome job, he really knows his stuff. Now that I have them, I wouldn't want to drive without.
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