Cleaning Old Small Engine Carburetor & Tune Up PT2

I finished cleaning the carburetor and put it back on the engine. Next it was time for a full tune up of the old engine to get it running well again.

Read the full article here: http://www.thedoityourselfworld.com/blog/?p=2094

This is an old 11 HP electric start Briggs and Stratton gas engine that I am repairing to use on my antique log splitter. If you missed the previous video please go back and see it here: https://www.youtube.com/watch?v=fLB9lAyfk44

We left off with me cleaning the inside of the carburetor. When I was satisfied that it was thoroughly cleaned I put it back together again. This was a bit tricky because the pieces fit snugly together and the air filter plate was a bit in the way.

But I got it all put together and took it over to the engine.

Mounting the carburetor back onto the engine only took a few minutes since I already knew where everything went.

Next it was time to fire this old thing up and see how well it runs.

We have a deep cycle battery on a 2 wheeled cart which is used around here for jump starts and for my electric boat motor. Jumper cables make the connection to the starter motor on the old Briggs and Stratton gas engine.

The engine turned over a few times and sputtered into life.

But I found that it was running very restricted and had to remove the air filter. It was saturated in motor oil through and through. This was not allowing enough air into the engine.

I had also cleaned out the gas tank with a rag to get some rusty water globs out. The tank was relatively clean though on the inside otherwise.

I put some gas in the tank with some sea foam to help the engine clean itself out.

After it ran a minute, I shut it off and then drained the oil. I always change the oil in any old engine right after I get it running again. I figure it is a waste of money to change out the oil before getting an engine running because it may end up needing a full overhaul later.

When I poured out the oil it was gray in color. This tells me that the engine was full of water. The oil and water were well mixed so I figure it had been previously run like this by the last owner.

After emptying out all the oil I put in some fresh oil and ran the engine again for a few minutes. Then I changed the oil one more time to get all the water out.

The engine was running but a bit rough. We went into town for some supplies. I wanted to get a new air filter and a spark plug for the old beast. Plus some more motor oil.

I had to order the air filter but got a spark plug and a new fuel filter and fuel lines for the engine.

I swapped out the gas filter and gas lines when we got back. Then I put in the new spark plug and fired up the old engine again.

It was running but sometimes a bit rough and smoky. It probably has some water in the valves and some buildup of carbon in the cylinder. I will run it a while to clean out the engine. I use Sea Foam on all my old gas engines to help clean them out.

Well, the engine is running nicely so I would call it a success.

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Troy
http://www.thedoityourselfworld.com
http://www.theoffgridproject.com

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