Cub 1650 carb problem

[coinman66]

Originally Posted by J-Mech

Unless you have one sitting, easier to fix what you have.

Causes could be:
Loose connection (electrical)
Incorrect float setting
Water/bad fuel

Not limited too these things, but I really can't think of anything else that would cause it. I know you have flushed the fuel system, but did you check the condition of the screen in the valve on the tank? You have to be overlooking it.

I do have a spare Walbro carb to try on it. Tried 3 times to set float tab, same results. Yah maybe I should check the fuel tank screen. Maybe not enough fuel flow to carb? Also, since these are gravity flow carbs, should I have more than 1/4 tank full of gas for proper fuel flow or should that not matter?

[J-Mech]

You should be able to run it until the tank is dry before it stops feeding gas to the carb.

[coinman66]

Ok thanks J-Mech.

[Yosemite Sam]

I didn't know you could adjust the float tab on a plastic float.

We need some history on this machine...

Is it new to you?

Have you been running it for years with no issues?

Did this just happen all of a sudden?

Did it start doing it a little at a time and worked its way to where it is now?

Please explain in detail how you cleaned the carburetor.

Is the carburetor missing the anti-splash gasket?

[coinman66]

Originally Posted by Yosemite Sam

I didn't know you could adjust the float tab on a plastic float.

We need some history on this machine...

Is it new to you?

Have you been running it for years with no issues?

Did this just happen all of a sudden?

Did it start doing it a little at a time and worked its way to where it is now?

Please explain in detail how you cleaned the carburetor.

Is the carburetor missing the anti-splash gasket?

I don't know if u can adjust a plastic float either? Can you lol? There is a bendable tab on it. Tractor is a friends who simply said it wasn't running right ever since they bought it a year ago. Took carb off took it apart and soaked it for 30 min in Berryman carb cleaner. Then used can of carb cleaner to hit all the small holes . Also used small wire to clean holes. Blew it out with compressed air. Reassembled. Got another carb I will try.(same model). I hooked a test light to positive on coil with key in on position while rocking the tractor back and forth. Light stayed on at all times. No shorting out. Which makes me think it's still a fuel issue?

[cubs-n-bxrs]

It really sounds to me like a float issue to me. Sounds like to much fuel is in the float bowl chamber. I think I would tell your buddy to lose the walbro carb and get a Kohler carb. I personally have never had any luck with Walbro carbs.

[coinman66]

Originally Posted by cubs-n-bxrs

It really sounds to me like a float issue to me. Sounds like to much fuel is in the float bowl chamber. I think I would tell your buddy to lose the walbro carb and get a Kohler carb. I personally have never had any luck with Walbro carbs.

So u think too much fuel in carb bowl? I will try one more float tab adjustment. And your right about the Walbro carbs. I prefer a Carter. Or maybe even order one of those carbs from Isavetractors.com. I hear a lot of people like them.

[cubs-n-bxrs]

With the float bowl off flip the carb over and see if the float is parallel with the mounting surface for the bowl. If not adjust accordingly. If that doesn't work I would try a Kohler carb.

[Roy Najecki]

I had a similar problem with my 1450. The problem turned out to be a collapsed/clogged fuel tank screen as J-Mech suggested. On another carb I popped off the carb welch plug and found junk in those cavities that are covered by the plug. I think when the tractor was moving the junk sloshed around the cavity and would occasionally block the passage.

[coinman66]

Originally Posted by Roy Najecki

I had a similar problem with my 1450. The problem turned out to be a collapsed/clogged fuel tank screen as J-Mech suggested. On another carb I popped off the carb welch plug and found junk in those cavities that are covered by the plug. I think when the tractor was moving the junk sloshed around the cavity and would occasionally block the passage.

I believe it's junk in that Welch plug like u said. Sloshing around and blocking ports. Put a different carb on it and symptoms are GONE!!! Now this carb made the engine knock somewhat but I'm sure it's because I didn't take the time and adjust high and low idle screws.