My Mf10 will not start in cold winter conditions. I set up a heater blow towards the engine for aprox 20 min and it will start at first compression. Runs beautiful, has plenty of power, doesn't skip a beat. My suspicion is that it doesn't have spark when its cold. Either because it's cranking speed is somewhat slower with cold oil or maybe the magneto fails at a certain cold temp. Tractor has the original cast iron 10hp Tecumseh engine, new points and condensor. It has the belt driven starter/generator. I have tryed boosting it with my truck, when its cold it can crank all you want, no start. A little heat and it starts instantly. I removed the spark plug and checked spark. Spark ok but remember that with plug removed it cranks faster too. Any help or advice would be appreciated.
- Thread starter breimer
- Start date
Your problem is probably being caused by one/more of the following-eng oil to heavy,manual says use 5/30,10/30 or #10 below 32 deg,DON'T use 10/40,eng getting low/has low compression or mech drag due to worn rings/internal parts,hi speed needle on carb set to lean,try opening 1/2-1 turn to richen,I have to do this on an hh100 & hh120 I have when temp below 35,also made a heater air intake,depending on temp/humidity carb would ice up when blowing snow with stock air filter assembly
I had 10/30 in it, Then I tried some expensive synthetic oil from Polaris, the stuff they recommend for their 4 stroke snowmobile engines. Not sure what weight that oil actually is though. There was no noticable improvement. Do you think that some 5/30 oil might make the difference?
You could try #5/30 or #10,but keep a close eye on oil level if eng starting to burn oil when useing #10,if eng still has problems starting I would say as Hal does,possibly weak magnets/coil,worn internal parts or you might just have to richen fuel mixture,given the age of eng you may have more than one problem & will have to spend some time with same to find problem(s)
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