48 B

[Anonymous-0]

My 48 B will not shut down by pulling the throttle lever back otherwise runs good. It has a DLTX 67 carbueretor. Is it the wrong carb.for this tractor,or is there another problem? Thanks.

 

[rick deere]

right carb , in the rod adjustment maybe

 

[The Dukester]

Either your throttle valve disk doesn't fit the venturi bore in your carburetor very well or the throttle shaft is kinda loose and allowing air to bypass and keep the engine going at a very slow speed....not too serious either way, just kill the engine by stalling it in a higher gear.

 

[BushogPapa]

Very normal to need a touch of choke or stop the engine in a high gear..
Or, you could install a grounding wire to the Mag, to kill the spark..

Ron..

 

[34gpa]

Somebody has bent the throttle stop pin forward so it doesnt shut down,just knock it back so it is straight up and down. It was all a matter of preference,some didnt like that feature,so knocked the pin ahead to a slow idle.

 

[F-I-T]

I was taught by my JD mechanic mentor, they were set to idle and not die with the throttle pulled all the way back, so that the all-fuel engine would be left to die by running out of fuel. Good habit BTW. That way they didn't stop with a charge of fuel oil in the cylinders, which meant that they were easily fouled.

When the gassers came along, same rule could be applied, but if you didn't choose to killl them by starvation, you could use a mag ground switch, or the ignition switch for a distributor. Mag grounding switch was a good choice especially if there were curious kids around jumping on the new-fangled electric start pedal.

I think in the manual for the early gas only engines, with magneto, you could pull the throttle to get it to idle nice, but that if you pulled back hard, it would push further against the stop screw spring to get it to die like that, no switch required. But for me, if I have a distibutor, it dies by the switch (except my pony motor, which dies both ways). But on my magneto "H", I shut off the fuel, which is a good habit to get into, especially on an "H", which can be easy as pie to restart, or, in many cases, tempermental.

 

[Mike Aylward]

If the throttle shaft, disk and bushings are tight they will (and are designed) to shut off by pulling the throttle back. However, they will only do this if the throttle stop pin is straight and not bent (as most of them were because this was not always a desireable feature). But when everything is right they will die, by design. Mike