Engine heater is the best yes, but if there is no electricity there, other options must be present.
Here in Norway most JD have a diesel heater in the intake manifoil where the flame heats the intake air.
Also heatplugs directly into the combustion chamber are quite common, but I'a not sure if those are used on JDs.
Here in Norway most JD have a diesel heater in the intake manifoil where the flame heats the intake air.
Also heatplugs directly into the combustion chamber are quite common, but I'a not sure if those are used on JDs.