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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

WINCO 3500 Portable Generator


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  #1  
Old 09-07-2018, 11:00:41 PM
Mark Schneider Mark Schneider is offline
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Default WINCO 3500 Portable Generator

An elderly neighbor was cleaning out his shed and inquired if I was interested in a old generator set as he hated to send it for scrap. When I showed interest he said "I'll be right over with it!" Turns out he had bought it new years ago for emergency house power and was mostly used during ice storm outages. It kept the furnace, freezer, fridge, and lights on in the house but "When Ma turned on the electric hot plate the motor would really grunt!"

When he came over with it and I saw it was a 8hp Briggs with a large diameter cast iron frame generator head I thought "All this for 3500 Watts?" And heavy...a two person job for loading for sure. It seemed much more heavy duty than the 3500 watt generators of today....

It hasn't run in years but I would like to get this thing operational someday. The motor is not stuck but suffers from the old Briggs recoil malady of rope out but very little back in. The rubber insulators are toast and I would like to know of a good source of replacements. As heavy as this thing is they will have to be of good quality.
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Old 09-07-2018, 11:45:00 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: WINCO 3500 Portable Generator

For the vibration isolators, try McMaster-Carr or MSC Industrial Direct. When ordering, you may want to also get some good hearing protectors. Those generators were the screamers of their day.

Since this unit has sat idle for so long, you may want to clean up the slip rings before using it. Also the grease in the end bell bearing may have hardened.
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Old 09-08-2018, 12:12:25 AM
Vanman Vanman is offline
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Default Re: WINCO 3500 Portable Generator

Well, if I was going to have a screamer, a good, old, high - quality one like this is what I would have! Can't imagine just scrapping something willy nilly. Glad you got it!
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Old 09-08-2018, 02:47:21 PM
Wayne 440 Wayne 440 is offline
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Default Re: WINCO 3500 Portable Generator

Quote:
Originally Posted by Mark Schneider View Post
...8hp Briggs with a large diameter cast iron frame generator head I thought "All this for 3500 Watts?"And heavy...a two person job for loading for sure. It seemed much more heavy duty than the 3500 watt generators of today....
See the rating plate for an explanation. That set is rated at 3500 watts, and the duty (cycle) is "CONT". That means continuous - in other words 3500 watts for several hours if need be, none of this "surge", "starting watts" or other BS that many new sets use to inflate the ratings.
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Old 09-08-2018, 07:55:16 PM
Newoldstock Newoldstock is offline
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Default Re: WINCO 3500 Portable Generator

About 2 hp per 1000 watts surge
Running amps will be less 80% or so of surge is a safe number.
Diesels tend to be a bit better at surge because they make more torque 2 hp=1000 watts is just a rough guess.
Small the machine more power per watt.....

Onan Kohler, Lister/Petter, Kubbota ect, people in the business of making high quality commercial units would rate them more conservatively assuming you would try and run a 4000 w unit at 4000 w.
That seems reasonable does it not?
I think most will carry that and more, but you should not run them full bore too long as they could overheat.
You need to know your machine, technical specs and overload ratings if applicable.

A clone generator with an engine rated at 6.5 should not be considered a 300 watt machine its more like a 5 hp 2000 watt machine.

How heavy something is to me is a pretty good indicator of how hot it will run and how long it will last and how much of a surge it might be able to carry.
The more oil it holds also leads me to think its better.
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Old 09-08-2018, 11:01:52 PM
Mark Schneider Mark Schneider is offline
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Default Re: WINCO 3500 Portable Generator

Quote:
Originally Posted by Steve Dawkins View Post
For the vibration isolators, try McMaster-Carr or MSC Industrial Direct.
Thanks Steve. It completely skipped my mind to check McMaster-Carr. I removed the best of the insulators to get the rubber puck dimensions and stud diameters. McMaster had an exact duplicate available but I chose the next size larger load rating and ordered 4. Should be here next week.

I've only seen the WINCO brand on some tractor PTO powered generators which are a common commodity on most farmsteads out here.

Noise levels a problem? The closest neighbor (2 miles away) will never know it's running. When push comes to shove and I need a genset to lift water out of the well or keep the freezers from thawing how much noise the genny's motor makes doing it's job will be of little importance to me.
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Old 09-08-2018, 11:05:08 PM
landreo landreo is offline
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Default Re: WINCO 3500 Portable Generator

A belt driven version of your Winco generator. This one had a rental company sticker on it so I assume it was a contractors rental generator. This one has the auto idle solenoid as does yours. It also has a spare oil tank for longer runs.
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Old 09-13-2018, 10:15:42 PM
Mark Schneider Mark Schneider is offline
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Default Re: WINCO 3500 Portable Generator

I got a chance to change out the vibration insulators. The originals had a load rating of 80 lbs. each. I chose the next heavier grade at 125 lbs. each and was glad I did. The ones under the generator head show a fair amount of scrunch already.

On the generator shrouding there is a "BAT +" terminal and a socket type connector labeled "START". Any ideas as to the purpose of these?

I soaked the recoil down with WD-40 and enticed the rope back into the recoil. After a few pulls with some ATF in the cylinder it seemed to have enough compression to fire...so no stuck valves. Also no fire at the spark plug which really doesn't surprise me......
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Old 09-14-2018, 11:50:30 AM
Steve Dawkins Steve Dawkins is offline
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Default Re: WINCO 3500 Portable Generator

Looks like your gen has electric start capability. The generator acts as a DC motor to spin the engine until it starts. In addition to the B+ terminal, there should also be a stud on the generator frame for connection to the battery ground cable.

Most of those use a heavy duty pushbutton switch, that looks similar to the floor mounted high beam switch on old vehicles. The socket connector you refer to may be for some sort of remote start switch, but I suspect it was a pushbutton and the plunger has has broken off. Remove the cover on the receptacle box and post some photos of the inside for us to see the starting components.
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Old 09-14-2018, 11:58:33 AM
Charley K Charley K is offline
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Default Re: WINCO 3500 Portable Generator

That 8 hp Briggs must have been the go to back in the day. I have two with the same engine, a 1700w and a 4000w. I put the 4000w on propane and used it on last year's hurricane. It was cool weather so I didn't need ac. Left the 18kw diesel on standby. CK
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