Jd b lacks power

[Moegibo444]

I have a 1950 model b that is seriously lacking power. Was running great til one day while cutting hay I ran out of gas. I put a can in and went about 300 ft before it started to lack power. Any ideas what the problem could be?

 

[CLW]

Bad fuel would be my first guess. Drain and try fresh fuel from a different container.

 

[Moegibo444]

I did drain the fuel and replaced with
high test from a brand new can. Also
changed plugs and checked igbition
system

 

[Garrscott]

You may have sucked debris from inside the tank into the lines...

 

[Garrscott]

You may have sucked debris from inside the tank into the lines...

 

[Moegibo444]

When I open petcock on bottom of carb fuel flows very strong

 

[Kurt_JDB]

The problem may be at the inlet of the tank. Blow some air back up through the sediment bowl, and then see if it will run.

Kurt

 

[Greenday]

Dont forget the inlet on the carb. It has a very fine mesh screen under the round cap above the needle valve! Could be plugged there

 

[JDG]

Get rid of the high test gas. The B doesn't like it or need it.

 

[luapp]

it onley has 2 cylinders

 

[MoMark]

For how long do you have a steady stream of gas at the carb? I had a wasp in the pipe that goes into the sediment bowl once. Would run fine until I got under a good load for long enough to empty the bowl, then it would starve out, since there was just a trickle getting through.

 

[Moegibo444]

I drained the tank via the draincock on the carb and tge flow was steady the whole time. Im thinking there might be something caught in a jet but wanted some feedback

 

[BushogPapa]

Explain what the tractor sounds like, when "It has no power"..??

Does it miss badly or Back-Fire..??

Does it Smoke..??

Have you tried to open the Power adjustment, to see if you can get it Rich enough to smoke black smoke under Load...??
If so, then you have good fuel flow at the carburetor..
I wonder what may have been in that can of gas..???
Have you checked the compression in each cylinder..???
If it is "Puney", it should have some noticeable traits that we will identify once you relate them to us...

 

[Moegibo444]

I am able to get it to backfire if I open the load adjustment enough and I have 80 psi in left cyl and 85 in right cyl

 

[BushogPapa]

If it Back-fires, it is LEAN..not Rich..

Rich==Black Smoke and a loss of Power..

LEAN==No Smoke, Back-Fire and Loss of Power..

Open the power adjustment several turns and Choke it while it is running and see if it will pull the dirt on thru..
(Power in Back, Idle adjustment in front)..

Ron..

 

[t boy 2]

Dirt daubers or wasp in the breather maybey. Have you checked to see if it is firing on both plugs? Take the beather pipe lose from the carb and see if that makes a difference. Let us hear back what you find now.

 

[BushogPapa]

Any chance the Mag may have some Moisture in it..??

If the Mag has even not enough moisture in it to see, it can make them run Terrible..!!
Back-Fire and crank and crank until it Back-fires more..!!
BTDT..didn't NEED the "T" shirt..!!

Ron..

 

[fixer2u]

I second this statement since you mentioned that you ran it our of gas. That last little bit in the tank may have sucked rust or some other debris in the inlet of the sediment bowl. I have had it happen to me.

 

[fixer2u]

If there is a partial blockage your bowl will still fill up under no load or light load. But under heavy load you may be starving the poor girl.

 

[Moegibo444]

Both plugs are firing. I pulled breather pipe off and had no change in running condition. Took carb off and have it soaking now. Will keep you posted