I have a 225 motor with a zenith carb on it, which is on a John Deere 800 swather. The motor had not been run for several years. Changed plugs wire, points cap, rotor. In the process of getting it running, it ran for a couple minutes and died, had zero compression in a cylinder, so decided to take head off, had the head completely gone through, pulled the pistons, new rings, and deglazed cylinder walls, gas tank was full of rust, cut apart, cleaned reassembled put in tank liner. Set the valves cold at 11 intake 21 exhaust. Fired right up and sounded great, ran beautiful for a bout 3 or 4 minutes and died, couldn't refire. Busy in shop with other projects, came back about a week later, fired right off, ran great for 3 or 4 minutes died, tried again next day, still wouldn't refire. Took carb apart and put a kit in it, cleaned it thoroughly. Then it fired but ran very rough, like it was getting too much fuel perhaps, changed the timing a lot just to get it to run rough at best. Pulled plugs and were wet. This is where you guys come in, I don't know a lot about setting carbs, but think the float may be out of adjustment? (flooding it out?) Is there a way to set that properly? Measurements of some sort? Any help is much appreciated. Thank You

Joel

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John Deere 800 swather with a 225 slant six

Carbs I've come across have a bolt into the fuel bowl (a peep hole) that you can remove. To correctly set the float you want the fuel to just be a hairs breadth below this line (so that if you opened the peep hole no fuel would come out). An adjuster is usually on the top of the bowl that can be adjusted and locked. Adjust until fuel trickles out and then back off a little. - Remember to be safe.

What carb do you have? jet sizes, what is your idle set to?
Are you getting the correct fuel Pressure to your Carb (usually 4.5 - 5 is PSI is good)
What kind of ignition do you have?

Cheers

I have a HD motor out of a John Deere Swather just like this.

They are a 225 slant six industrial motor that comes with a points distributor, a motorola alternator, and a Bendix-Zenith 1 barrel carb.

When I pulled it apart it has about 1/4" of mud in each bore, and the zenith carb had a seized throttle plate.


http://www.slantsix.org/forum/viewtopic ... ght=zenith


I definately would check the float adjustment per the kit and make sure that the needle and seat aren't stuck or a peice of garbage from the fuel line made it past the filter sticking the needle open a bit.

-D.Idiot