Generators and Motors
[Home] - [HELP] - [Forums] - [Articles] - [Photo Gallery] - [Groups] - [Chat] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] - [Tools]

Go Back   SmokStak > SmokStak® Vintage Electrical Equipment > Generators & Motors General Discussion > Kohler Generators
Forgot Password? Join Us!

Notices

Kohler Generators Restoring, maintaining and operating vintage Kohler generators.

Kohler Generators

Kohler Model 800M25 / Briggs BP


Hello all, I thought I'd start a new thread on my latest acquisition, now that I've tinkered with...

this thread has 7 replies and has been viewed 507 times

Reply
 
Thread Tools Display Modes
  #1  
Old 06-22-2013, 03:44 PM
vanman vanman is offline
Registered-I
 
Join Date: Aug 2011
Location: Mission Viejo, California
Posts: 48
Thanks: 9
Thanked 1 Time in 1 Post
Default Kohler Model 800M25 / Briggs BP

Hello all,

I thought I'd start a new thread on my latest acquisition, now that I've tinkered with it enough, and researched it enough, to learn some about it first.

It seems these are usually 800(M or A or E)21. What does the 25 on mine mean? I know the model means it's 800 watt and manual start, and the 25 has something to do with voltage (it's 110, 2 wire, 60 cycle), but what else does it mean? I've scoured this site and the internet at large, and cannot find what the 25 means vs the 21.

It's missing it's cast iron base. I'd love to have an original, if I can find it. Otherwise I'll be forced to make one, and it might be welded steel, but it won't be cast iron Anyone know where one might be languishing?

I've got an electronic copy of the original manual for the Briggs Model B engine, which brings me to the first question:

Oil. The manual calls for SAE# 20 for all temperatures above 32* F. Is that still available? Or what do you recommend?

Air cleaner. Most unfortunately, it's missing! If anyone knows where I might find one, I'd really appreciate the info.

Carburetor. Mine has a Tillotson which is not listed in the manual. And I'm pretty sure it's not original, since the throttle linkage really doesn't have enough room between the carburetor and the engine to move quite all the way. It still works fine now that I've tinkered with it, but just isn't right. The carburetor itself works great, except the throttle shaft is sloppy, which causes it to be a tad lean on light load. I've got the idle mixture screw way out, and it's just barely enough. I adjusted the main mixture screw at full load. Is a Tillotson a good carburetor, worth my trouble in bushing the throttle shaft? Or should I seek out one of the original type of carbs listed in the manual?

I've ALWAYS wanted a single cylinder 1800 rpm generator set, and now I FINALLY have one! YAY! It appears to be in very good condition. After some governor and carburetor adjustments it runs and generates well.

I just LOVE this "little" set. It successfully started and ran everything I could find to plug into it (not all at once, of course!).

Ok, that's probably enough for now

Thanks,
Keith
Attached Thumbnails
IMG_1125.jpg   3Fa3N23Hc5Gf5K75H3d5c7e3844a7b16f1cf1.jpg  
Reply With Quote
Sponsored Links
  #2  
Old 06-22-2013, 04:13 PM
vanman vanman is offline
Registered-I
 
Join Date: Aug 2011
Location: Mission Viejo, California
Posts: 48
Thanks: 9
Thanked 1 Time in 1 Post
Default Re: Kohler Model 800M25 / Briggs BP

I forgot to report the impressive list of items this little set could operate:

1/2 hp Century repulsion start induction motor- even with my shoe on the pulley as a load! No problem with this.

A modern refrigerator. It noticed it during the couple seconds of starting, but running was as though it was barely there.

An 8k btu AC unit- 730 running watts. It started it up INSTANTLY, as though it were connected to the mains. Ran it just fine too.

An large antique fan, with cast aluminum blade, powered by a 1/4 hp Delco split phase motor. It did struggle a bit with this, but did get it going just fine, tanking only a little longer to start than it does normally.

I've got the carburetor and governor adjusted well enough now that it can go from no load at 60-1/2 cycles and about 125 volts to full load (800 watts of bulbs) at 58-3/4 cycles and 118 volts or so, and back to no load without any misfire, hunting or excessive overshooting. What an awesome little generator set!
Reply With Quote
  #3  
Old 06-22-2013, 08:27 PM
LWB250 LWB250 is offline
Registered-III
 
Join Date: Oct 2008
Location: Tampa, FL USA
Posts: 832
Thanks: 13
Thanked 259 Times in 230 Posts
Default Re: Kohler Model 800M25 / Briggs BP

The number "5" used after the voltage code was used for a short time to signify a "portable" set, which yours would be considered. I don't think it was used for long, because it is pretty rare to see it.

While you may only have an 800 watt generator, it's got a LOT of mass due to the size of the windings and the large flywheel. As a result of this it will handle changes in load with minimal difficulty. That's because once you get all of that mass turning, it takes a lot of energy to stop it.

Nice little unit. Certainly a beast if you were to consider it "portable"!

Dan
Reply With Quote
The Following User Says Thank You to LWB250:
  #4  
Old 06-23-2013, 02:58 PM
vanman vanman is offline
Registered-I
 
Join Date: Aug 2011
Location: Mission Viejo, California
Posts: 48
Thanks: 9
Thanked 1 Time in 1 Post
Default Re: Kohler Model 800M25 / Briggs BP

Hey Dan,

Thanks for the info about the "5" meaning my set is "portable". This is good, since I wanted to make it portable with casters so I can scoot it around by myself, and handles such that two (strong) men could lift it when necessary. At least it will be true to it's model number Probably also explains why mine has a fuel tank and not a fuel pump.

Thanks again,
Keith
Reply With Quote
  #5  
Old 07-09-2013, 12:32 AM
vanman vanman is offline
Registered-I
 
Join Date: Aug 2011
Location: Mission Viejo, California
Posts: 48
Thanks: 9
Thanked 1 Time in 1 Post
Default Re: Kohler Model 800M25 / Briggs BP

Hello all,

I've made an unfortunate discovery- the insulator portion of the slip ring assembly is cracked...

My friend made a video of the set when we first got it running, and the stroboscopic effect of the video frame rate made it apparent that something didn't quite look right with the slip rings.

So the last time I had it running, I tested for slip ring run out with my finger (while not touching anything else!) and discovered it to be terrible! I could actually see it with the naked eye!

Here's the video, before carburetor and governor adjustment:
https://www.youtube.com/watch?v=VZRdHjhBEKA
Reply With Quote
  #6  
Old 07-09-2013, 08:38 AM
LWB250 LWB250 is offline
Registered-III
 
Join Date: Oct 2008
Location: Tampa, FL USA
Posts: 832
Thanks: 13
Thanked 259 Times in 230 Posts
Default Re: Kohler Model 800M25 / Briggs BP

You may find these still available. Check with Buckeye Power in Columbus, OH, or TAW Power Systems in Tampa, FL.

A motor shop might be able to find a generic replacement.

Slip rings can be replaced without disturbing the rest of the armature. Any qualified motor repair shop can do this.

Dan
Reply With Quote
  #7  
Old 07-09-2013, 08:06 PM
vanman vanman is offline
Registered-I
 
Join Date: Aug 2011
Location: Mission Viejo, California
Posts: 48
Thanks: 9
Thanked 1 Time in 1 Post
Default Re: Kohler Model 800M25 / Briggs BP

Hey Dan,

Thanks for the leads. I was visualizing machining one out of engineering plastic, using the original slip rings, but I'll check those leads first.

I also want to check the armature itself for run out, before I go any further. I don't like how it's just hanging off the crankshaft with no outer bearing. It would seem to me that it could bend the crankshaft all too easily if the unit were rough handled, like set down hard or dropped.
Reply With Quote
  #8  
Old 07-09-2013, 09:24 PM
LWB250 LWB250 is offline
Registered-III
 
Join Date: Oct 2008
Location: Tampa, FL USA
Posts: 832
Thanks: 13
Thanked 259 Times in 230 Posts
Default Re: Kohler Model 800M25 / Briggs BP

Don't worry about the crank or the armature. Both are well designed and are not going to break, trust me.

Dan
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Kohler 800M25 115vac 800w Ron D. Kohler Generators 1 06-23-2012 08:28 PM
Kohler over Briggs Travis Small Air Cooled Gasoline Engines 20 07-08-2009 07:22 PM
Briggs/Kohler generator set akretowicz Kohler Generators 3 02-19-2009 06:59 PM
Briggs Model PB Crank (For Moto-Mower Detroit Model) Jonathan Widelo Small Air Cooled Gasoline Engines 0 02-05-2009 01:43 PM
Briggs engine model W series and Y model Travis Small Air Cooled Gasoline Engines 1 02-01-2009 07:58 PM


All times are GMT -4. The time now is 02:47 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark
A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2014 by Harry Matthews
P.O. Box 5612 - Sarasota, FL 34277