Rolling ChassisMotor mounted!
OwnerStephen Chapman
Owner's Other EV2000 Fisher-Price Powerwheels Bigfoot
LocationOak Ridge, North Carolina United States map
Web/EmailWebPage email image
Vehicle1975 Murray 11HP 36
Murr-E is my electric lawn tractor conversion. It is now in use pulling a trailer, but will eventually have a front mounted dump box and a snow blade.
MotorGeneral Electric 5BC48JB92 Series Wound DC
60's vintage EZ-GO golf cart motor. It
sat unused in the woods for over 30
years, but cleaned up nicely. It is
rated 1.5HP @ 2800 RPM and 36V/40A.
DrivetrainBelt drive to stock Murray transaxle
(made by Peerless Tecumseh)
from original ICE location. I picked
up a pulley from Tractor Supply to
avoid building anything special.
ControllerCurtis 1206
I made a schematic, contact me if you need a copy.
Batteries3 Everstart 27DC-6, 12.00 Volt, Lead-Acid, Flooded
Walmart deep cycle, (not the
starting version). Rated 115AH or 160
minutes at 20A for $62. This class
battery seems to be popular for tractor
conversions.
System Voltage36 Volts
ChargerSoneil 1212SR
I have the original '60s vintage 36V
"Golf Car" charger that will belt out
25 amps, but it is just a
transformer/variac/rectifier/timer. I
will use (3)of the Soneil 12V 5A that I picked up from eBay for $50 each. These will be mounted onboard.
InstrumentationMotor and battery ammeters are
planned...
Top SpeedFaster than I can walk!
AccelerationEntirely adequate.
RangeTBD
Watt Hours/Mile1 hour full speed in 5th gear took 2kWh to top off the charge.
Seating Capacity1 adult
Curb Weight400 Pounds (181 Kilograms)
Estimated...
TiresTypical lawn mower fare. I had to put
tubes in, but after 34 years, the tread
is still in very good shape.
Conversion Time100 hours estimated. I get a good rate
on my time. :)
Conversion CostThe Murray tractor was free, the motor
was free, and the #6 wire was free. The batteries will be around $200, the
controller, potbox and contactor should add up to another $200, terminals, fuses, instrumentation are expect to be another $250 for a total of $650 for the EV part. I will probably spend around $100 refurbishing and painting the 1975 donor.
Just a grownup Powerwheels riding toy....

code by jerry