Techumpseh 5hp HSSK50 snowblower (MTD) dies under load. good compression, new carb, good fuel flow. governer or valve lash diagnosis?? adjustment? dies in 4" of snow. non ethanol fresh gas.

SOURCE: engine runs intermidently when under

CHANGE SPARK PLUGS. IF YOU ALREADY DID THIS, DO IT AGAIN AND USE RECOMMENDED BRAND. THEN TEST COILS.

Adam Fjeld

• 1508 Answers
• Posted on Jun 08, 2012

SOURCE: 2004 Gator bogs down under load. Carb has been

wrong forum

SOURCE: 96 bayou 300 idles good when you give it gas fast it backfires and dies

Just a quick check, could there be air getting inbetween the carb and motor? Sometimes it could be leaning out? Just a thought?

SOURCE: I installed new carb. on my tecumseh 5hp. snow king and it wont start. I have spark and gas is flowing out of carb.

This can be very frustrating and tough on the back and arm.
Always confirm the the fuel tank valve is open and the stop/run switch is in run position

It takes three things to run:

1. Compression. This is the resistance that you feel as you crank the engine. Some engines have compression release to assist getting the rotation started. You should be able to feel the compression stroke as you rotate, Remove the plug and you can easily tell the deference. If it had, last time used, been running and starting with no problem I would assume that the compression is OK. Gauges are available to check. at lease 120 PSI
2. Spark. It is near impossible to lose the spark timing on these. It can only be magnitude and presence. If in doubt about the condition of spark plug replace. I usually lay the plug on top of the head with wire attached and observe for the spark. No spark no start.
3. Confirm that the throttle is in the wide open position. It is possible during the repair the spring or rod has closed the throttle air valve. Air/fuel mixture is always hard to trouble shoot. I use open choke and starter fluid to conform that compression and spark are working. After that I will choke on a cold motor and pull listening for the first fire. At the first fire I would usually half choke and pull to first run. Full choke for many pulls will only flood engine!! If no joy then I would allow engine to vent and go back to start fluid. If it will run on start fluid than either carburetor is messed up or quality of fuel is bad.

SOURCE: I have a Troy Bilt trimmer model TB675EC...4 cycle engine. Problem that has arisen is that it dies at high speed and under load. Starts up and runs at idle well.

Fuel starved, carb should have an idle adjustment which sounds like it is fine. Look for the second adjustment