Why do my tractor struggle to start when hot. Can my fuel pump be a tooth out

check fuel filter first and that fuel pump works by openig at fuel pump and pushing fuel out just short of injection pump-- if no fuel pushes out prime fuel system by pushing air into fuel tank or using a in line hand fuel pump--- fill tank on tractor so that fuel is above injector pump also helps probably a prime problem

Could be the timing is off. Jumped a tooth, or recently had timing belt replaced incorrectly?

You might also have air in your fuel system - do you have a clear section of line that you can visually confirm fuel going to the injector pump? A blocked fuel filter could be causing a fuel vacuum back towards the tank.

you have a bad fuel pump

Tell me what engine you have, petrol or diesel

here is some things you can take a look at

Elect Connections
air in fuel
fuel non return valve
condition of fuel
air filter blockage
engine mechanical condition
fuel injectors pump timing
engine coolant temp sensor
fuel quantity adjuster / positioning sensor
injector pump
fuel pump
ecm faults

Just check,

• fuel pipe
• fuel pump ,fuses, wiring
• if mpfi engine, check the injectors.
• spray some fuel line cleaners into fuel line, pcv, air filter
• pls vote!!
  

ignition coil
if it completely rest and cool down then turn on fine then get worse when hot until cut off then replace coil

i had the same problem, it is most likely that your fuel lines are leaking and fuel pump in tank is weak
when the tractor sits for a while the fuel drains back into the tank, thus your injection pump has no fuel in it.i solved it by replacing all the lines and i added electric fuel pump on outside of tank and connected the power to key,when i start the tractor i turn key on for a minuet or so than start the engine ,it solved the problem.
john b

Sounds like you may have a problem with Choke adjustment, or perhaps a broken choke cable. Do you have a workshop manual?

I think one of the intake valves, or a valve pushrod, is bent or warped. When the engine heats up, the metal expands and the valve starts sticking open. That would cause compression to be lost in one cylinder, reducing available power so things drag when you engage the blades. This would also causes air/fuel to be blown back through the intake. I think you'll need to take it to a small engine mechanic. Good luck! Please rate my solution if helpful, thanks.

Hi
Two things come to mind. First it could be not getting enough fuel when hot due to carb adjustment being too lean. That could be that the float level in the carb is set too low or the low speed jet is set too lean. When cold the choke circuit in the carb supplies the extra fuel required.
Second in some enjines that have low compression they start cold but when hot the compression drops below 60 psi and makes starting very difficult until engine cools down.
I suspect a fuel problem.