Anonymous-0

Well-known Member
the y2k MTD Yard machine Millenium is running. Apparently the battery won't hold a charge. My sil stopped by and I hit the key to show him how just the solenoid clicks and there was nothing. So I robbed the battery from the other mower and the starter worked fine but no start. Poured a little gas in the carb, it fired right up and continues running. Apparently removing the plunger fixed the gas flow issue. However after it sat there running we noticed a little bit of flame where the exhaust pipe enters the muffler and it also red hot. Plugged muffler? Cut it off and run a straight pipe?
 
The red muffler sounds like it is running too rich. Some red is normal in the dark.

It is extremely hard to plug a mower muffler. If it was plugged, it would blow off from the exhaust. There is not much inside that could cause issues.
 
Old told me to check the timimg, so I'll take alook at that. I do not see any way to adjust air or fuel mixture on this carb. Techumseh Enduro 15.5 overhead valve engine.
 
This is a series 7 with a fixed high and low speed mixture.
http://www.smallenginesuppliers.com/html/engine-specs/tecumseh/Tecumseh_4-Cycle_OHV_Engines_Service_Information.pdf
 
Did I hear ya say it was a barn find ? maybe some critter made a nest or mud dobber built a nest in exhaust.. what the plug look like ?

Found this info for valve lash in a web search....----------------------------------------


Expert: RUSS replied 3 years ago.

the numbers were a typo

i would go with .004" on the intake, and .006" on the exhaust.
 
cost me $35 for someone to clean mud daubers nest out of weed eater muffler.

i was not smart enough to find it. lol
 
Ya the flywheel key can get half sheared and when it does that throws off the timing just enough to make them run hot. Seen a good many that the flywheel key being made of soft metal and made to shear can cause odd problems
 

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