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I have a snowflite 10/28 snowblower with a 10hp tecumseh hmsk100 engine and it will not start, will go for a couple of seconds then backfires

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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trippssmengi
  • 76 Answers

SOURCE: tecumseh 2 cycle snowblower

I know this may sound stupid but I've don it my self is the gas on? If it is then my next ? is, does the nut on the bottom of the bowl have an adjustment screw in it? If it does see if it is turned in all the way, if it's turned in than from just bottom out turn it out 1 1/4 turns out that is the fuel flow needle once running that needle may need to be fine tuned,also if it is turned out to far it wont run either cause it will flood out. If that doesn't work it might be something internal with the carb.let me know how you make out and if we need to check into it further.

Posted on Dec 27, 2008

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plkruger
  • 32 Answers

SOURCE: Backfire Tecumseh Generator

To maybe convert your Flamethrower back to a generator, Make sure the fuel line is a good quality thick rubber material (like OEM )since it passes through the engine,HEAT is a issue, if it has been modified to steel, or it's thin rubber, it will overheat the fuel on its way to the carb and cause backfires after the engine warms up , ( vaporizing gas and pressure bypassing the jets flooding the engine) I use 1/4 inch Goodyear sold at Autozone , one of very few name brand quality parts you can get there. The other possible cause is carbon deposits built up on the leading edge of the valve not allowing the valve to close all the way, just clean the valve, it is caused by too lean or rich carb setting or clogged jets, if it is a newer style carb with a pink main jet then debris in this area will always cause backfire, check and make sure the old tiny O-ring on this jet is not still in the bottom of the shaft, people forget to pull them out all the time or give up trying to pull them out, I use a paper clip and bend the end 1/8 of a inch @ 90 degrees to fish hook it out of there, CLEAN THE SHAFT with carb cleaner and a Q-tip.... A Tecumseh engine will always backfire if the carb or airflow is not perfect and sealed tight !!!!!! it looks simple to rebuild the carb but you must take your time and look close, clean it very well, make sure the jet is SEATED properly and all tiny holes are clean, use guitar string not torch head cleaners as they will enlarge the holes and make your carb run rich.

Posted on Feb 05, 2009

  • 3 Answers

SOURCE: hard to start and backfires from muffler when running

Sounds like the timing may be off or maybethe exhaust valve maybe hanging open.

Posted on Mar 15, 2009

trippssmengi
  • 76 Answers

SOURCE: TECUMSEH ENGINE PROBLEM

Hello,
First check the oil and make sure that ti is full. Then remove the spark plug wire and spark plug, then take the recoil cover off and with a socket to fit the flywheel bolt and a breaker bar, try to rotate the engine by hand. Also while you are trying to rotate the engine have someone take and spray some penetrating fluid like seafoam (you can get seafoam from some auto parts stores) don't spray to much, just enough to coat the cylinder wall, and a wooden dowel that just fits in the spark plug hole and log enough to hold onto while inside the head tap on the dowel with a hammer to try to free it up. If it frees up spray a little more seafoam into the cylinder then put the recoil cover back on and pull it over a few times to lube the cylinder wall. If it does not turn the I recommend bringing it to a reputable repair shop. They may be able to free it up or if it is real bad they may be able to help you get a used or new motor for it. Hope it works for you.

Posted on Mar 25, 2009

Coleman37
  • 337 Answers

SOURCE: I have a Tecumseh 10hp HMSK 105. I can't get it to

I had a similar problem with an edger and it was due to the blade hitting part of the frame so that the shaft could not turn. With the spark plug disconnected (be careful), try turning the blade with your hand. You can also pull the spark plug and see if the lack of compression makes a difference. I know this isn't a definitive solution but hopefully it will help. Good luck.

Posted on Feb 28, 2010

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To maybe convert your Flamethrower back to a generator, Make sure the fuel line is a good quality thick rubber material (like OEM )since it passes through the engine,HEAT is a issue, if it has been modified to steel, or it's thin rubber, it will overheat the fuel on its way to the carb and cause backfires after the engine warms up , ( vaporizing gas and pressure bypassing the jets flooding the engine) I use 1/4 inch Goodyear sold at Autozone , one of very few name brand quality parts you can get there. The other possible cause is carbon deposits built up on the leading edge of the valve not allowing the valve to close all the way, just clean the valve, it is caused by too lean or rich carb setting or clogged jets, if it is a newer style carb with a pink main jet then debris in this area will always cause backfire, check and make sure the old tiny O-ring on this jet is not still in the bottom of the shaft, people forget to pull them out all the time or give up trying to pull them out, I use a paper clip and bend the end 1/8 of a inch @ 90 degrees to fish hook it out of there, CLEAN THE SHAFT with carb cleaner and a Q-tip.... A Tecumseh engine will always backfire if the carb or airflow is not perfect and sealed tight !!!!!! it looks simple to rebuild the carb but you must take your time and look close, clean it very well, make sure the jet is SEATED properly and all tiny holes are clean, use guitar string not torch head cleaners as they will enlarge the holes and make your carb run rich.

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