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According to the owner's manual, the correct oil/gas ratio for a Toro s200 snowblower is 32:1, or 4 ounces of oil for every gallon of gas.
compression of a toro s200
.030
The spark plug may be fouled. Remove the plug and check to see if it needs to be replaced.
When installing the diaphragm on your S200 carb, 1st remove the 4 srews on the bottom of the carb.Remove cover and take notice to the order of the gasket and diaphragm.Usually diaphragm 1st then followed by gasket.Clean gasket areas and revorce removall
Plug is Champion RJ18Y. Gap is 0.035 This is on page 12, in maintenance section of Toro S200 Snowthrower operators manual. Checked at local Advance Auto Parts store here in upstate NY (south of Rochester) and they cross referenced this plug and said to use Autolite # 86, Price $1.69 + tx
My S200 has a Champion RJ18YC plug installed or a Number 58. Gap should be .030 inch.
I purchased my Toro weedeater in 2007. It uses a 50:1 gas/oil ratio.
i need a model number for the engine of a toro zmaster model # 78491
40:1
32:1
50:1