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WINCO 3500 Portable Generator

Railroads

Registered
Power resistors are dime a dozen on the web. Is it possible to get any readings off the burned resistor? Otherwise AlanR's method is the best approach for figuring out the value of a replacement.

Might be worth checking with the parts man again to see if they have any documents left that would have the specs?

I would use a momentary contact toggle switch. It would probably be more appropriate for the starter switch and likely to last twice as long.

Robert
 

Mark Schneider

Registered
Last Subscription Date
11/14/2018
The resistor is open between the terminal ends. The wire coil burnt off in the middle. For what it's worth I cleaned off the ends, took some readings, and ended up with .5 ohms per side. However this info may not be very reliable as it is unknown how many resistor coils are in contact with each other.

A momentary contact switch for starting is a must for keeping an inexperienced operator from burning out this resistor again. It could be that the previous owner didn't understand the "start" switch was for engine start only and had nothing to do with the generator head producing electricity.
 

Railroads

Registered
A 1 Ohm resistor? It's hard to tell without knowing the voltages present at the resistor wires. The 1 ohm resistor very well could be correct as they did make resistors about that size with similarly thick gauge resistance wire.

Something like this maybe? https://entersell.com/products/clarostat-vp25k-1-chassis-mount-wirewound-resistors-1-ohm-25w-5-qty-4
Modern day aluminum 1 ohm 25 watt power resistor. https://marvac.com/products/dale-nh-25-1-1-ohm-1-non-inductive-25-watt-metal-power-resistor-25w

Modern day aluminum power resistor 1 ohm 50w. https://core-electronics.com.au/power-resistor-1-ohm-50w.html

I will let someone else more familiar with this generator setup chime in as I am no expert on these older units. I am assuming correct operation would be 12 to 14 volts DC and something like 1 to 2 amps for trickle charging the battery when the engine is running.

Robert
 

Mark Schneider

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Last Subscription Date
11/14/2018
Robert...Thanks for the research on my behalf. It looks pretty promising that an equivalent resistor can be found. It looks like a test run is the next order of business. Hopefully the generator head will light up and I can get some voltage readings.
 

Mark Schneider

Registered
Last Subscription Date
11/14/2018
No progress to report but have been hammering away on the firewood supply instead. Lost the best part of 3 weeks this fall to rain and unexpected early snow in late Sept/early Oct. Finally finished the shop wood last Thursday and am glad to be done! ;) Weather here will soon be driving me indoors.....
 

Attachments

Duc Tape

Registered
Mark, I recently purchased an almost exact match of yours. Mine sadly has no identification plate and I cant read yours.
Could you tell me the model so I can get a better understanding of mine?
 

Attachments

Mark Schneider

Registered
Last Subscription Date
11/14/2018
The model number on mine is 305BH-FE/I. It may not be a match for yours as this WINCO generator family had different engine horsepower and output but used very similar shrouding. You can search the website here: https://www.wincogen.com/

Once you scroll through the generator archive section you will see what I mean.

Welcome to the "Stak" and best of luck with your generator project!
 
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