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Air Compressor #1301456 Sun Mar 03 2019 01:01 AM
Joined: Feb 2011
Posts: 863
R
rickmg Offline OP
Shop Shark
Picked up a Champion Porta Champ air compressor at an estate sale today. Serial #212938, Model #FM10G. I can find no info on it. It has a gas engine that appears to be a Briggs & Stratton, and a single stage compressor. Maybe a 1960-70 vintage compressor. 15-20 gal tank. The engine has compression and spark and no rust in the tank. It hasn't been used in a very long time. Any info help from you folks would be appreciated. I'm going to disconnect the drive belt and see if I can get the engine to run, then check into the compressor.

Rick

Last edited by rickmg; Sun Mar 03 2019 01:02 AM.
Re: Air Compressor [Re: rickmg] #1301494 Sun Mar 03 2019 04:46 AM
Joined: Aug 2001
Posts: 3,585
2-Ton Offline
Shop Shark
Being that old, check the inside of the air tank for rust.
You wouldn't want it to blow on you!

Don

Last edited by 2-Ton; Sun Mar 03 2019 01:18 PM.

Of all the things I've lost in my life, I miss my mind the most!

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
More pix on Photobucket
'46 2-Ton grain truck
'48 3/4-ton grain truck
'50 2-ton flatbed
'54 Pontiac Straight Eight
'70 American LaFrance pumper fire truck.
Re: Air Compressor [Re: rickmg] #1301503 Sun Mar 03 2019 05:48 AM
Joined: Feb 2004
Posts: 18,804
H
Hotrod Lincoln Offline
Boltergeist
Old B&S engines, the ones made before electronic ignition, are notorious for getting oxidation on the ignition points if they're not run regularly. Pull the flywheel and burnish the points with a clean pencil eraser- - - -it has just enough abrasive to polish the contacts without leaving deep scratches. Then loosen the attaching screws for the ignition coil and use a 3X5 index card to set the gap between the coil and the flywheel magnet. Set the point gap (I think it's .020") and button everything up. That aluminum flywheel timing key is made of soft metal for a reason- - - - -don't get tempted to replace it with a steel key. Do all the above, and you'll have a hot spark that happens at even very low cranking speeds. You can pull the spark plug and spin the flywheel by hand and still get a good spark.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Air Compressor [Re: rickmg] #1301561 Sun Mar 03 2019 06:16 PM
Joined: Mar 2014
Posts: 1,008
J
Jon G Online
Shop Shark
Also check the pickup tube and screen. You'll have to separate the gas tank from the carb to do this but I've found many that were clogged or plugged...particularly if they've been sitting for a while and especially if they were the 5hp model. If you put a bit of gas in the spark plug hole, replace the plug and it starts when you crank (or tries to start), it is a good indication you're not getting gas through the carburetor.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: Air Compressor [Re: rickmg] #1301567 Sun Mar 03 2019 07:24 PM
Joined: Feb 2004
Posts: 18,804
H
Hotrod Lincoln Offline
Boltergeist
That's particularly true if a partial tank of "deathanol" added gasoline was allowed to sit and evaporate after the final run of the engine. That white powdery residue has spelled the demise of a lot of carburetors. I've got a very nice belt-driven compressor on a tank with a hole rusted into it. It's about to get adapted to a retired 100-lb. LP gas cylinder that's out of date on inspection, and the gas vendors refuse to fill. Those tanks are far heavier and stronger than the ones used for compressed air. I'll have to do a little creative plumbing to create a way to drain condensation, but that's not a big deal.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Air Compressor [Re: rickmg] #1301577 Sun Mar 03 2019 08:39 PM
Joined: Oct 2005
Posts: 2,628
MNSmith Offline
"Hey! I sound like Darth Vader!!
Find and attach a weld-on bung?

Re: Air Compressor [Re: rickmg] #1301619 Mon Mar 04 2019 01:03 AM
Joined: Feb 2011
Posts: 863
R
rickmg Offline OP
Shop Shark
Update

The engine has great spark. Runs with gas dumped into the carb then dies. Replaced the fuel line, it was so brittle it broke off. Put some gas in the tank and it would not run. Gas makes it to the carb and no further. Took the carb off and disassembled. Stuck needle and seat. Very little crude in the carb. In the process of making a new gasket for it. I noticed there is no needle adjustment screw on the idle mixture hole on the side of the carb to adjust for idle mixture. Is this normal for a gas engine air compressor? There is no throttle on this engine. It is set up to run a constant fast rpm.

Rick

Re: Air Compressor [Re: rickmg] #1301623 Mon Mar 04 2019 01:09 AM
Joined: May 2005
Posts: 9,076
G
Grigg Offline
.
No throttle? It must be governed somehow so as to not explode if running unloaded.


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Re: Air Compressor [Re: rickmg] #1301630 Mon Mar 04 2019 01:42 AM
Joined: Feb 2011
Posts: 863
R
rickmg Offline OP
Shop Shark
It has an adjustable rod that keeps the throttle in a fixed position. There is also a spring loaded governor.

Rick

Re: Air Compressor [Re: rickmg] #1301687 Mon Mar 04 2019 04:05 PM
Joined: May 2005
Posts: 9,076
G
Grigg Offline
.
I see, it does have a throttle but no easy manual control of it. Thanks for the clarification.

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