1650 Carb

Here is some other things for you to consider. You need to basically narrow it down to either a fuel or ignition problem after you have checked out the big things like compression, manifold gasket leaks, etc. (follow what RAB told you).

1) If the carburetor is getting plenty of fuel and the float is OK, then you could likely have a bad main jet in your carb. If you screw the jet all the way in and it doesn't kill the engine, then the main jet is bad. Unfortunately, a carb kit will do you no good as I have never seen a carb kit that gives you more than a few gaskets and a new needle valve for the float. You will have to buy a rebuilt carb ($200 or $300).

2) If points and condensor are giving you problems, then you might consider putting in solid state ignition. There is a company in California called Pertronix that makes kits for most tractors. They are really easy to install. I think it was around $100 last time I bought one a couple of years ago.

I am not saying these are your problems, but do consider them. I am not just talking off the cuff, but speaking from practical experience on both these items.

With the carb inverted and gasket in place, the float should be 1/4 inch above the gasket. With no gasket, set the float 9/32 inch above the machined surface of the carb half.

When adjusting (bending) the float arms, carefully use needle nose pliers and remember not to exert pressure on the needle and seat. Also, when reassembling, check to make sure that the float moves freely and does not interfere with the sides of the bowl at any point.

With regard to engine temp, you want to see it in the "normal" range when working the tractor. If it is not getting there, check the thermostat. If it tests OK and you are operating in cold weather, you may have to partially block off the radiator to get the temp up. In the winter months, I noticed that my 1650G will make a lot of condensation in the crankcase if I do not run it hot enough. (I stuff rags in the square holes of the cast grille.)

As Rab stated, you may have other factors at play here, especially if it has been monkeyed with. However, once you get it straightened out, I think you will come to appreciate this great tractor.

Don"t give up - you will persevere!

Good luck,
Scott