D10 carburetor issues

Good morning,

I have a D10 that i bought last fall that had been finicky to get going, but now it just flat out doesn't want to try.

I have set the top and bottom screws to 1 and a half out on the top and 2 and a half out on the bottom.

With the low idle stop screw on the engine side of the carb backed out, then motor will fire slightly when cranking, but won't start idling. When i speed the throttle lever up, it loses the ability to even fire, it'll just crank. It acts this way when i pull the choke at the low idle speed, no firing.

This morning i got it running, but once i put load to it at half throttle (tried driving forward), it fell on it's face and died. Then it wouldn't fire again, so I'm wondering what basics i need to start at to make it easier to run.

Don't be afraid to ask questions, i want to get this figured out.

Sounds like you are not getting a good fuel flow.  Start with the sediment bowl to make sure fuel is coming from the tank.  If so, the bottom jet in the carburetor may to clogged.  You need to take the carburetor apart and make sure fuel is moving through the jets.  When adjusting, the 1 1/2 rule is designed as a starting point for the adjustment screws.  Almost always about 1/2 to 1 round is all you need to use on the top screw.

If you put your hand over the air cleaner inlet and shut off the air, and the motor still runs, then you have an air leak somewhere.... Since the motor does not appear to want to SUCK GAS thru the carburetor, the air leak is probably on the gasket on the manifold, or a crack in the manifold... look close.

Edited by steve(ill) - 07 May 2023 at 12:35pm

if it runs on ether ... then your not getting the gas flow.. either the carb main jet is plugged or there is an air leak after the carb which does not allow it to SUCK GAS out of the carb.

Edited by steve(ill) - 07 May 2023 at 4:29pm

If I missed it in your posts I'm sorry, but is it new fuel? This sorry excuse for gasoline today causes syptoms you describe too once it sits a while. Just thought I'd ask.

Nah, that should fire. Does it backfire? Good compression? Plugs and wires good shape too?

Edited by Jgranat - 07 May 2023 at 7:43pm

The plate number is 213348.

I can pull the carb again and double check.

Am i wrong in thinking that spraying the ether on and at the intake manifold and gasket should have let me know if there was a leak?

I have not checked compression, plugs were new last fall and visually, the plug wires look good, no rubbing, not weathered or faded.

Alright, so just compression tested it. From front to back we were:

122
125
125
130

Over the last month, I've put between 5 and 10 hours on it around the yard. So it has been running, it just is a pain to get started. If won't go and crank and crank, then the next time it'll fire up without trouble.

The gas running out the bottom of the carb would mean to much gas for the air going in. But it not wanting to take off above idle would mean not enough gas through the main jet. Compression seems okay. I didn't get run up with ether spray.

Any other thoughts?

How is your spark at the plugs?

We had very much the same issue with my Dad's D10. The coil was the culprit that time, with another used coil installed, it was like a different tractor with quick starts and amazing throttle response.

Thank you all for the suggestions, the weather got decent again, so we are back in the field. It'll be a few days the way it looks before i get to it again. At that point i will start checking over the electrical system and see what i can find out there.