Coleman Powermate Generator 4600 series

They have model numbers and that is needed to search. '4600' is a wattage output not a model number, and are you sure it is 4600 and not 4500?

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There is no 4600

https://www.powermate.com/search/?text=4600

4500 manuals

Powermate PM3800, PM4400E, PM4500 Portable Generator

https://www.electricgeneratorsdirect.com > manuals
PDF
This manual contains important instructions that must be followed during placement, operation, and maintenance of the unit and its components. Always supply ...
84 pages

Powermate Portable Generator User Manuals Download

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Download 246 Powermate Portable Generator PDF manuals. User manuals, Powermate Portable Generator Operating guides and Service manuals. ..

Try check the exciter bridge rectifier. Diode fault is one of common problem. For some clue where is the diode board,, check it here Powermate PM0435001 Generator Parts

sae 30 I use GTX

the generator consists of 2 120volt windings that run in parallel for 120 volts and in series for 240, check the change over switch make sure a wire hasn't fallen off, if you have a multi meter check both coils have the same resistance

Make sure the engine RPMS are correct, and change the capacitor in the end of the alternator cover

Start by checking the circuit breaker.

check

avr / brushes if it has them

if not capacitor and diodes on the end of the armature

Your RPM's are too high. There is no voltage regulator in coleman generators (generator is actually made by generac) and is 100% dependent on engine speed. There is a screw under the tank when your looking in from the recoil side. It controls the governor arm. Screw it in and it incresses the rpm, out decrease. Plug something in that draws a decent load while setting the rpms since you want it to put out 120 and 240 underload. Your idle voltage does not matter.

Two suggestions. One: check for voltage from the secondary coil wires (if it has one). Two: unless stated do not do this, I have always flashed the excitor circuit through the 120vac receptical. Give these a shoot and I hope it works for you.

Hi, You don't say whether this is under load or not but if not is within the acceptable range, which is +/- 10% . Generally speaking, voltage on a generator is not the issue but the load which it will carry, hence their wattage ratings. Measure your household voltage and you will see that it varies from day to day but usually stays within the limits and your electrical panel is rated in amperage. Hope this answers your question!