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  #11  
Old 03-18-2013
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Re: is anyone using an electric motor to get out of the marina

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Not sure how green a battery in the land fill = VS = how many gallons of gas I will use ?
Car batteries are about as green as you can get.

According to the Battery Council International, car batteries are the most recycled product in the U.S. and far more likely to be recycled that objects you might typically find in recycle containers. They report that over 99% of battery lead is recycled, which is amazing when you consider that only 48% of paper, 44% of aluminum cans and 22% of glass containers are recycled. In a large part the success of battery recycling is due to programs that make it profitable for auto supply shops to collect and sell the batteries to recycling plants. Battery recycling is a four-step process.

Environment for Futur: What Happens To Recycled Car Batteries?
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Old 03-18-2013
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Re: is anyone using an electric motor to get out of the marina

I have a slightly different question, but close enough to this topic that I'll ask it here.

I have a cheapo inflatable (see my Avatar) that I may use as a dinghy this coming season. They make a motor bracket for it, and it's rated for up to 2 hp. I really don't want to put a gas motor on it, and may just try rowing it. But if we end up cruising with our dog, rowing may be a little more difficult, and some motor power would help.

An alternative would be to get the motor mount and put on a small trolling motor, which should be fine for runs to shore in protected waters.

My main question is about the battery for this. For an inflatable dinghy, I can't imagine putting in a group 24 or other full size battery. Does someone know of a more portable battery that might be more appropriate. Obviously it would have fewer Amp-hours, but hopefully enough to get to shore and back a couple times before needing to recharge.
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Old 03-18-2013
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Re: is anyone using an electric motor to get out of the marina

most dinghys with a wood floor, rib or air floor could handle a group 24 easily. The 3 gallon gas tank almost weighs as much. We have a minkoda with a group 24 in addition to our 4 hp Tahatsu and it handles it fine.

You might want to look at the Torquedo...but they are expensive. Not sure what their batteries are and if they are Lithium Ion/

Dave
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Old 03-18-2013
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Re: is anyone using an electric motor to get out of the marina

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Originally Posted by chef2sail View Post
most dinghys with a wood floor, rib or air floor could handle a group 24 easily. The 3 gallon gas tank almost weighs as much. We have a minkoda with a group 24 in addition to our 4 hp Tahatsu and it handles it fine.

You might want to look at the Torquedo...but they are expensive. Not sure what their batteries are and if they are Lithium Ion/

Dave
The inflatable that I have is a soft inflatable floor. So a group 24 is going to sink down pretty severely. It would be nice if it worked, because I have two extras available in my basement hooked up to my backup sump pump, and I frequently take along one of them as a spare.

But I really think that for this boat I need something lighter. I have a very nice jump starter with AGM battery inside, but the specs don't give an A-h rating, so I may have to run a test to determine what it is:


But a jump starter like this is optimized for high cranking amps, not deep discharge, so it may not be best for this application. Plus, it looks too pretty to leave in the dinghy on shore, and would probably "grow legs and walk away."
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Old 03-18-2013
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Re: is anyone using an electric motor to get out of the marina

Lithionics Automotive Lithium Li3 Batteries

lightweight battery
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Old 03-18-2013
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Re: is anyone using an electric motor to get out of the marina

An electric outboard--trolling or Torqueedo--might be practical for a small lake, but the Great Lakes are a different matter. The purists might fulminate, but sometimes you really need an auxiliary that can stay the distance--and that means enough power to push through weather for long enough to get to safe harbor. Not talking about a dinghy here, but your primary boat.

A small gas outboard would be the minimum for safety purposes, IMHO. It's hard to beat the energy per pound of gas and you can "recharge" your gas motor at sea if you carry a spare gas jug.
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Re: is anyone using an electric motor to get out of the marina

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Originally Posted by chef2sail View Post
most dinghys with a wood floor, rib or air floor could handle a group 24 easily. The 3 gallon gas tank almost weighs as much. We have a minkoda with a group 24 in addition to our 4 hp Tahatsu and it handles it fine.

You might want to look at the Torquedo...but they are expensive. Not sure what their batteries are and if they are Lithium Ion/

Dave
Dave, when I first read your message I didn't see that you included inflatable bottoms in your list of acceptable bottoms. I might just go ahead and try the spare Group 24 that I already have, assuming I can find a safe way to strap it down. As for the motor, I'm just thinking of an inexpensive Minnkota 30 that Amazon has for ~$100. Anything more would be overkill, since I'm just looking for an alternative to rowing. My main reluctance to doing this at all is that I don't want to have to register yet another boat. If I just row with oars, I don't need to register. But I do worry about getting to shore with the dog if we find an opportunity to anchor out this summer, and it seems that I have enough misc. stuff lying around (inflatable boat, extra battery) to have this capability with relatively little extra money.
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  #18  
Old 03-26-2013
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Re: is anyone using an electric motor to get out of the marina

Well I did it. A guy was selling a 55#thrust transom mount electric trolling motor on craigslist for $150. I offered him $125 if he would come to me and he accepted. I already have a spare battery and I plan to charge it with my existing solar pannel. I figure even if the solar pannel cant top it off between trips I can always carry the battery home with me. Now I need to figure out how to mount it. I dont want to buy another bracket unless I have to.
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Old 03-26-2013
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Re: is anyone using an electric motor to get out of the marina

Quote:
Originally Posted by davidpm View Post
Car batteries are about as green as you can get.

According to the Battery Council International, car batteries are the most recycled product in the U.S. and far more likely to be recycled that objects you might typically find in recycle containers. They report that over 99% of battery lead is recycled, which is amazing when you consider that only 48% of paper, 44% of aluminum cans and 22% of glass containers are recycled. In a large part the success of battery recycling is due to programs that make it profitable for auto supply shops to collect and sell the batteries to recycling plants. Battery recycling is a four-step process.

Environment for Futur: What Happens To Recycled Car Batteries?
Yes but at what cost to the Mexican environment? that is where most are now shipped to be recycled.
http://www.nytimes.com/2011/12/09/sc...anted=all&_r=0

Though honestly there are not many alternatives.

Torqueedo makes a nice system as a replacement to an outboard. then there are a few outfits that replace inboards with electric motors. I know that I sail on the "Woody Guthrie" (32 foot wooden sailboat) and it is powered by an inboard electric motor and batteries. They go out every weeknight and I believe they only charge every few days. It is very nice to not have to start up an inboard, if I thought I could deal with the limited cruising distance I would go for it.

Last edited by miatapaul; 03-26-2013 at 05:31 PM.
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Re: is anyone using an electric motor to get out of the marina

I've never had a small inflatable but as I understand the problem. What to fasten a motor to? I imagine a long plywood box with a bracket on the hind end for engine clamp It's long enough to slip into a strap /pocket glued to the center bow. Wide enough to straddle like a horse, say 12 inches, deep enough to offer some lockable storage and rigidity, say 5 inches and strapped/clamped to the blunt end Probably limited to a 9.9 but you'd have to try it to be sure.
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