Question-------------------------
Followup To
Question -
I have a MTD snowblower with a Tecumseh 5hp engine; model #HSSK50 67366M. Has always run well, although infrequently.
The problem is this: It will start briefly, run for a few seconds and then die. I have spark, plenty of gas, fuel line is clear, no clogs in the carb (needle and seat).
Can you help direct me?
Thanks
Dan Willert
Answer -
Hi Dan,
If I recall, your engine is a 4 stroke. If so, you only need compression, timed spark and the correct amount of clean, fresh fuel for it to run. Compression is probably okay if it starts and runs briefly. Spark seems good too and the timing in your case should not have changed. Make sure that there is no water in the fuel. Then, test the fuel delivery by squirting fuel or a flammable carb cleaner into the carb opening to try to keep it running. If it does run then something is causing the fuel flow to stop.
Let me know what you find.
Michael
Michael
Thanks for the quick reply. Since the tank was just about empty, and I refilled with fresh fuel yesterday, and it still stalls out, it would seem that the fuel is just "stoppng" for some reason. Although in previous tests, it squirts out freely when disconnected from the carb. I have also tried the starter fluid technique, with the same "runs immediately and then stalls"
What about vacuum?
Thanks Dan
AnswerHi Dan,
If the fuel flows from the line then we know that it is not clogged at the tank. I still think there is a problem in the carb. You mentioned the needle and seat, maybe they are sticking or the orfice is clogged. The vacuum from the cylinder through the carb should allow the fuel to enter, providing, that all the small openings in the carb are open and not clogged. As the engine is cranked over you should feel a vacuum at the carb opening. On a 4 stroke, if there is compression, there is also vacuum at the carb.
Other than that, I can't think of anything else.
Let me know how you make out.
Good Luck,
Michael
