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Boat Forum / Building / February 2008Engine mount Minn Kota trolling motors.
My first question is if anyone has used these type of trolling motors and would they recommend them?? I'm thinking of using the RT80EM mounted to a tiller attached to my Bank Dory. 2. Would there be a problem if I attached the unit upsidedown so as to limit the amount of draft needed to get the motor in the water. The manual says the cavitation plate needs to be 13" under the water for the engine to work. I'm thinking of attaching it to a wooden cavitation plate built into the tiller but attach it on the bottom of the plate so as to lessen the draft required to get the props in the water. The comapny sent me an email reply saying they only recommend instalation as per the instructions. Anyone see a problem with what I'm thinking of doing??????? On Feb 22, 1:25 pm, doubl...@hotmail.com wrote: > My first question is if anyone has used these type of trolling motors > and would they recommend them?? I'm thinking of using the RT80EM [quoted text clipped - 9 lines] > instalation as per the instructions. Anyone see a problem with what > I'm thinking of doing??????? When you say "mounted to a tiller" do you mean mounted to a tiller steered outboard? My experience fishing very shallow water for redfish with trolling motors is that there is minimum distance underwater that the motor has to sit, it probably is close to 13" to the cavitation plate, maybe a little less, otherwise the motor will make a lot of noise by sucking air into the prop and scare the fish. You need about 18" of water to use a trolling motor; less than that get out the pushpole. An engine mounted trolling motor would not be my first choice for shallow water fishing, due to the stealth and finesse required. I've had the most luck with a 30# Minnkota Endura, transom mounted, that sits next to my tiller steered outboard. I get 100 yrds or so from my quarry, kill the outboard, drop down the Minnkota, and slide on in silently. Ed. Ed, Thanks for the reply. Look at this link. GO down to features and click on "Engine mount guide" http://www.minnkotamotors.com/products/motors/detail.asp?pg=fem# Traditionally,the motor is mounted on the cavitation plate. I'd like to put a "fake cavitation plate" on my tiller,it's just a wooden tiller and I was thinking of putting cleats on the sides of it as a cavitation plate, and mount the motor upside down so I wouldn't need to draw as much water. It really isn't a cavitation plate, just 2 cleats to mount the motor. If you look at the diagram Minn Kota provides, the motor is mounted on the cavitation plate of an outboard 13" below the water but it sticks up off the cavitation plate a few inches. I don't have an outboard, just a tiller. I'm thinking of making another tiller just for when I use the motor. TIA, Bob On Feb 24, 8:39 am, "drs...@volcanomail.com" <drs...@volcanomail.com> wrote: > On Feb 22, 1:25 pm, doubl...@hotmail.com wrote: > [quoted text clipped - 27 lines] > > Ed. Looks like cruise ship pods miniaturized for small electric boat. The large motor is 200 lbs thrust. Throw 2 pair under a 14 foot skiff and you'll have a great little no-hands row boat. Ed, Thanks for the reply. Look at this link. GO down to features and click on "Engine mount guide" http://www.minnkotamotors.com/products/motors/detail.asp?pg=fem# Traditionally,the motor is mounted on the cavitation plate. I'd like to put a "fake cavitation plate" on my tiller,it's just a wooden tiller and I was thinking of putting cleats on the sides of it as a cavitation plate, and mount the motor upside down so I wouldn't need to draw as much water. It really isn't a cavitation plate, just 2 cleats to mount the motor. If you look at the diagram Minn Kota provides, the motor is mounted on the cavitation plate of an outboard 13" below the water but it sticks up off the cavitation plate a few inches. I don't have an outboard, just a tiller. I'm thinking of making another tiller just for when I use the motor. TIA, Bob On Feb 24, 8:39 am, "drs...@volcanomail.com" <drs...@volcanomail.com> wrote: > On Feb 22, 1:25 pm, doubl...@hotmail.com wrote: > [quoted text clipped - 27 lines] > > Ed. If you mount them upside down they will be under water when you are running on plane under power of the O/B. That would be too much load for the mount. To do what you want make a mounting plate in the shape of a horse shoe. Develop a clamping mount lock. When you want to troll drop the mount on top of the cavitation plate lock it in and go. > My first question is if anyone has used these type of trolling motors > and would they recommend them?? I'm thinking of using the RT80EM [quoted text clipped - 9 lines] > instalation as per the instructions. Anyone see a problem with what > I'm thinking of doing??????? I have no outboard and I didn't want to cut a hole in the hull for a motor well. This electric motor will be the only motor for power. I'm aware of the constraints of electric.My biggest concern was if mounting it upside down was a problem. I think it'll work but just wanted some more input. Basicallt it's a Bank Dory propelled by an electric motor mounted to a tiller. It eliminates the need for a motor well and it looks better than a trolling motor with a shaft hanging off the bow or transom. What do you think?? Bob > If you mount them upside down they will be under water when you are running > on plane under power of the O/B. That would be too much load for the mount. [quoted text clipped - 20 lines] > > instalation as per the instructions. Anyone see a problem with what > > I'm thinking of doing??????? Make a swim platform type plate on the transom at the necessary position to mount the motors as you intended. I see no problem. You could even mount them to the hull bottom like an inboard, use two pairs controlled separately and you would have steerage as well. A rudder would be better but that could me added after if allowances were left from the beginning. I have no outboard and I didn't want to cut a hole in the hull for a motor well. This electric motor will be the only motor for power. I'm aware of the constraints of electric.My biggest concern was if mounting it upside down was a problem. I think it'll work but just wanted some more input. Basicallt it's a Bank Dory propelled by an electric motor mounted to a tiller. It eliminates the need for a motor well and it looks better than a trolling motor with a shaft hanging off the bow or transom. What do you think?? Bob On Feb 25, 8:18 am, "John C." <jcass...@optonline.net> wrote: > If you mount them upside down they will be under water when you are > running [quoted text clipped - 23 lines] > > instalation as per the instructions. Anyone see a problem with what > > I'm thinking of doing??????? John , That's a good idea. The problem is that i need to beach this boat. I also think the tiller will protect the motor when in forward and the tiller can be removed when rowing. I also am planing on using 2 different tillers for sailing and motoring. It also allows me to take the motor off the boat when not in use. I like the flexibility mounting it on the tiller gives me. Bob > Make a swim platform type plate on the transom at the necessary position to > mount the motors as you intended. I see no problem. You could even mount [quoted text clipped - 45 lines] > > > instalation as per the instructions. Anyone see a problem with what > > > I'm thinking of doing??????? On Fri, 22 Feb 08, doublesb wrote: >I'm thinking of using the RT80EM >mounted to a tiller attached to my Bank Dory. I've been following this thread but I've been confused from the start. Are you maybe using the term "tiller" when you actually mean "rudder"? A "tiller" is simply a handle. Aka, "stick". I can't quite picture how you can attach a RT80EM to a "tiller". A "rudder" yes... a "tiller" no. Or maybe I'm just missing something -shrug- Rick I apologize if I used the wrong term. Yes, the rudder is what I mean. I've always wrongly called it a tiller. Anyway, do you see any problems with mounting the motor upside down??? Minn Kota said they only indorse mounting it per the instructions. Bob On Feb 25, 1:37 pm, Phant...@nospam.invalid wrote: > On Fri, 22 Feb 08, doublesb wrote: > >I'm thinking of using the RT80EM [quoted text clipped - 8 lines] > > Rick Frankly, right side up looks upside down to me lol! And it seems to me that mounting it per Minn Kota's instructions would mean mounting it on the cavitation plate of an outboard or sterndrive, which you, obviously, aren't going to do. So as long as you're winging it anyway, I don't know why upside down should present a problem. Dayem, that thing is expensive. But you're set on that arrangement, huh? If it were me, I'd be lookin' at a transom mounted trolling motor. I don't really see what you are going to gain with all the alteration and expense you're contemplating. Rick >I apologize if I used the wrong term. Yes, the rudder is what I mean. >I've always wrongly called it a tiller. Anyway, do you see any [quoted text clipped - 16 lines] >> >> Rick Well, I must be missing something. What's the advantage of mounting these on your rudder, vs. a simpler, cheaper, and more reliable transom mounted trolling motor? Certainly it's not better shallow water capability. You can't be what you can get with just the transom mounted motor as designed. Ed. drskew wrote: >Well, I must be missing something. What's the advantage of mounting >these on your rudder, vs. a simpler, cheaper, and more reliable >transom mounted trolling motor? I asked the same question and I can think of only 2 possibilities. 1) Aesthetics. He's a traditionalist and doesn't want to spoil the "look". ......or...... 2) He's into serious sailboat racing, looking for competitive advantage, and he's up to sumthin' against the rules! ;-) Rick > Well, I must be missing something. What's the advantage of mounting > these on your rudder, vs. a simpler, cheaper, and more reliable > transom mounted trolling motor? I have no experience with such, but have been speculating a bit about a similar arrangement. My reasons were - Does not spoil traditional looks - Steerable motor from the usual tiller arrangement (also on reverse) - Easier to remove and hide when leaving the boat - Easy to remove (replace rudder) when sailing, no extra drag - The rudder would protect the engine when grounding or beaching -H On Feb 25, 7:43 pm, "drs...@volcanomail.com" <drs...@volcanomail.com> wrote: > Well, I must be missing something. What's the advantage of mounting > these on your rudder, vs. a simpler, cheaper, and more reliable [quoted text clipped - 3 lines] > > Ed. A transom mounted trolling engine with 80# of thrust is the same price if not more than an engine mounted one. I probably could get by with a lot less thrust but I want to make sure the setup is efficient and capable of being tranfered to a bigger boat if I build one. The look is also important. Also, my transom is raked at 35 degrees. If I use a transom mounted motor the shaft will be well away from the bottom which I personally think looks unappealing. This engine will be the main power source. Why not make it look as good as possible?? Also I can build a RUDDER which pivots up if I hit something. I'm assuming the shafts on trolling motors don't take hiting bottom or beaching into account. Maybe I'm assuming wrong. There are tides involved where I'm using this and the water can get real shallow. Price wise it's a wash compared to the transom mounted one so why not go with one that doesn't detract from the looks with all the advantages I have stated. They would be ideal to power something like this http://www.carlsondesign.com/sneakesy.html Electric inboard with plenty of room for batteries and plenty of reserve buoyancy. > My first question is if anyone has used these type of trolling motors > and would they recommend them?? I'm thinking of using the RT80EM [quoted text clipped - 9 lines] > instalation as per the instructions. Anyone see a problem with what > I'm thinking of doing??????? I'd say any dory or sharpie would be a perfect match for this system. You would have many hrs on the more efficient 24V system since it wouldn't take much to push those hulls. I'm planing on using solar panels to charge the batteries. > They would be ideal to power something like thishttp://www.carlsondesign.com/sneakesy.html > [quoted text clipped - 18 lines] > > instalation as per the instructions. Anyone see a problem with what > > I'm thinking of doing??????? |
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