Small Engine Problems? Ask an Engine Mechanic for Answers ASAP
Thank you for choosing me to help you. My name is XXXXX XXXXX I will do my best to help you find the answer you need to resolve your problem.
Can I get the model type and spec off the engine please? Also from your description I am assuming that you have no primer or choke on this engine. Can you verify that?
Here are the numbers that I am looking for.
yep, no choke/primer, no fuel switch, kill switch, just dead man switch on the push handlebar
model 120000 quantum 725 ex, 190 cc
Thank you. Without the full model and type I can not give you part numbers, but your problem is the automatic choke. It works of heat created by the muffler which moves the choke closed when cold and open when warm. If you remove the air filter and shoot a bit of starting fluid into the carb the engine should start and run.
The fix for this is to replace the thermostat that is attached to the muffler. This seems to be an ongoing problem with these engines
model stamped number is XXXXX 3425 b1 11082958
have already tried manipulating the choke manually for starting, two butterfly valves with a demand flow circuit, ether will get a couple of cycles but won't sustain
The outside (closest to the air filter) is the choke. It should be closed when the engine is cold and then open as it gets warm. If it is working correctly then I would check the main jet inside the carburetor. At the very bottom of the carb is a nut, pinch off the fuel line and remove this and then clean out the side jet - see picture
already checked the jet when I had it apart both side holes and central orifice is patent,
kinda bummin' even if the bimetallic had failed, one could manually adjust the choke
any other ideas?
carb kit and rebuild?
k so it goes, plug definitely getting wet, any reccs for the kit number for this mower?