Hi I have a Lincoln electric 6.5 kva marine Dis- gen KA 1183 Kubota engine Spec AS3660 model 0950-BG2 Alternator Spec AS3748 after a engine rebuild the motor will start when cranked but as soon as the start button is released the motor stops. After testing there is no voltage coming from the alternator. Can you please supily a wireing diagram, the unit came with a operating manual dated 1/3/1987 , the serial No D 1406, Code No 1074-2

The voltage regulator on a Kubota ZG327 mower is typically located within the electrical system of the mower, often near the battery or the engine. The exact location can vary depending on the specific model year and design of the mower. Here are some general steps you can take to locate the voltage regulator:

1. Check the Operator's Manual: The best place to start is by consulting the operator's manual for your Kubota ZG327 mower. The manual should provide information about the location of the voltage regulator and other electrical components.
2. Inspect the Engine Compartment: Open the engine compartment of the mower and look for any electrical components that resemble a voltage regulator. The voltage regulator is usually a rectangular or square-shaped component with wires connected to it.
3. Follow the Wiring: Trace the wiring from the battery and alternator to locate where they connect to the voltage regulator. This can give you an idea of its general location.
4. Look Near the Battery: Voltage regulators are often located near the battery, as they play a role in regulating the charging of the battery.
5. Consult a Service Manual: If you're having trouble locating the voltage regulator, you might want to refer to a service manual for your specific mower model. Service manuals often include detailed diagrams and information about the various components and their locations.
6. Online Resources and Forums: You can also search online for resources specific to your Kubota ZG327 model. Online forums, community websites, and Kubota-specific websites might have discussions or guides related to the location of the voltage regulator.
7. Professional Assistance: If you're unable to locate the voltage regulator on your own, consider seeking assistance from a professional technician or a Kubota dealer. They will have experience with your specific mower model and can help you locate and diagnose any electrical issues.

gen set circuits are the same as any other electrical circuits and if you are an electrical engineer , you will have training in gen set circuitry and construction
all gen sets are basic in construct with a few cosmetic additions to make them more sale able
of course you could always search --workshop manual for kubota ask-r1560 model sa-b

yes
the adjustment is by the rpm setting on the governor spring
thee is a nut that you adjust the spring tension with and lower the rpms and watch the voltage gauge until you get the desired voltage
if the load is going to be constant but is well within the rated capacity( example 2kva of a 6.5 kva set) of the gen set then the variation when the load comes on will be less than 5 volts
however if the power required is close to the max capacity of the gen set ( example 4.5kva of a rated 5 kva set) , then turn the unit on and adjust the rpms up to the required voltage required
remember that an advertised kva is not the rated kva
rated kva is what the gen set will produce all day and is normally around 1kva less than advertised kva
so if you have a 6.5 kva gen set ,it will handle current peaks to 6.5 kva but will burn out if required to run long time at that load
if the gen set is 1000 watts then rated watts will be less ( 750-800) for long time use

Try bleeding the generator as some air could have entered in the system.

talk with the gen set manufacturer
The question here is , you are fitting a different alternator to an engine so is the engine of sufficient torque to maintain 85% capacity under full load of the alternator
25KVA extra requires more HP than a 100 kva so that should be the first consideration
Is the engine big enough to run the bigger alternator

With a gen set that big I strongly recommend a qualified electrician for the job as one touch and you will be charcoal.

try adjusting the gen voltage at no load to run at 240 volts
when the load comes on it will drop back to 220-235 volts
check the load output from the inverter as 2.5 kv is nearly 80% of the genset duty cycle
4.5 KV is start up KV and the duty KV is around 3..8 kv not the plated 4.5 kv
to get constant 4.5 kv you will need a 5.5-6 kv unit
if the current draw from the inverter is excessive , the engine may not have enough in reserve to over come the load and will not pick up the rpms
take the gen set and the inverter to a shop that has a calibrated load bank to test accurate power output to determine if the engine needs an overhaul

replace injectors