Great project Doug, hope you get it working. Ya know, with two of them you don't have to undo ET1, just make ET3 or is that ET4? LOL

 

Very intriguing project,

 

This will be neat to follow along with, thanks for sharing

 

Thanks Casey, the blue one EV1 as it's named just sits around and doesn't do much, some of it's parts are needed for the grey one ET1.

What I want to do is to show people that by using common available parts, they can convert there riding lawn mower the same way this one will be done.
They can see what parts I used, where I got them from, how much it really costs. Also what kind of performance you could expect from it, cutting power and run time.
That's the goal for this one.

 

I see Doug. So ever since ET2 and the NI you left out ET1. So now it gets a new lease on life lol.

 

Hi Doug. Not green with envy or anything . My budget currently is under scrutiny . Glad somebody is trying this . It is not clear to me whether a controller is recommended or not . However a seat switch and manual disconnect should be there for at least service purposes.

I plan on digging into two electric golf carts to see if they are restorable. Haven't got them home yet. And the mud here ! I promised I would't whine too much to my wife but it don't matter, I be wasting my breath

 

Hi Doug. Not green with envy or anything . My budget currently is under scrutiny . Glad somebody is trying this . It is not clear to me whether a controller is recommended or not . However a seat switch and manual disconnect should be there for at least service purposes.

I agree on the safety switches, the blue one has a dead man type foot switch, lift you foot and the tractor stops.
The Grey one I just got has all the factory safety switches in place so I plan on using some of them so that anybody even kids can run the tractor and not get hurt.
There also needs to be a manual battery disconnect that can be quickly used if the motor won't shut off when it's suppose to.

This type of motor does not need a controller as it only spins 72rpm per volt, 3456rpm at 48volts with no load on it, it behaves like a gas engines governor does at full throttle.

 

Doug, I will be watching with much interest. Good luck.

 

I'll be following along on this one Doug. You got me hooked.

 

Doug,this is going to be a great project to follow,and I will be watching closely.

 

Put the motor up for sale today, be nice to see somebody make use of it as it runs pretty good.
Also to get a few bucks to put back into the project.

Motor sold deleted video. 3/3/12

 

Cool project Doug. Looking forward to more updates.
I take it, you'll be trying to put in 12volt batteries, rather than 6volts?

 

Yes I somehow got to get 4 big 12volt batteries in there, I think 1 of them is going to have to be mounted back behind the seat. The bigger the battery pack, more amp/hrs, the longer the run time.
This fellow here uses the same motor I plan to, on a similar, newer, lawn tractor, and is a really good example of what I'm trying to do. He has 1 battery mounted out back.
Also a good example of what can be expected in what it can do.

http://www.evalbum.com/918

 

Doug, with most of the 270 lbs of batteries up front, will you need to do anything to the front axel / pivot?

 

If 1 goes out the back then 3 are under the hood, 1 battery probably weighs the same as the gas engine fuel tank and fuel.
So only the weight of 2 batteries, 135lbs will be added on the front end.

 

Every time I see this thread I think of the movie ET and " ET phone home!" Good luck here, Doug. I would be a bit concerned with all that weight on the front axle, too.

 

MURPHYs LAW

Today after work I took the motor out and pulled the pulley off and found a stepped crank, I thought all these small lawn tractors had 1" x 3" cranks on them. Turns out some of the early model Vert shaft engines had stepped cranks. 1" down to 7/8" (see pic) Live and Learn.

The engine has a Code# of 810326 11, Model# 252707
I think that makes it 1981yr made, which is what the tractor is, most likely original.

So now the hunt is on for another pulley off of a later model Briggs.
Or I have to modify the pulley I have.

The irony is that Eteks are suppose to have a 7/8" x 1-1/2" output shaft, but the one I got is 1" x 2-7/8"
I was so happy to get the 1" shaft thinking that it would be a simple swap.

 

Sorry to hear about this issue Doug.
You'll get it sorted out.
I know, you're a resourceful guy.

 

Im glad you were able to get the gray one for this project! I will be watching this one, without a doubt! sorry about the issue with the pulley, Im sure you will figure something out!

 

Can you bore the pulley you have all the way thru to 1 inch and then just use the key to where it fits?

 

Looks like they used a piece of 1-1/4 outside dia pipe and put a bushing in it at one end to fit the crank.
The 7/8" stepped part of the crank is only 1-1/4" long.
I can probably knock the pulley bushing out, then I'd have to put another bushing in to fit the 1" Eteks shaft.
The inside dia of the pulley is 1.060"

 

Would finding 2 pulleys the right OD and make a spacer between them work? I think you can find a keyed shaft coupler at McMaster-Carr that would work. Maybe this:

 

Thanks for the info the pulley assembly is
5" tall, bottom one is 5-3/4 dia, top one is 4-1/8 dia.

Anybody got one kicking around.

 

Tomorrow I go see a friend who has a pulley that he thinks will work, almost the same dimensions and for a 1" shaft.
Says he has 30 of them total from different lawn tractors.
Hopefully this problem is solved.

 

Problem solved, got myself a pulley that will work and some other parts I needed, traded the 11hp Briggs for it all.
It's good to get rid of stuff you don't need for stuff that you do need.

 

Glad to hear that you made a good trade. So will you be bolting the motor on this afternoon?

 

Im pleased to hear you have that worked out. I was thinking the same as Casey... whens it going together?

 

Next thing to do is make the mounting plate.

 

Hey Doug , just a suggestion . Before you borrow parts from a previous build , get good pics of it .You will thank yourself .

 

I posted this link before and the fellow has just updated it.
He has been mowing his grass for 7 seasons and his batteries are now loosing there capacity.

http://www.evalbum.com/918

 

Doug,thanks for the link.