My S200 has a Champion RJ18YC plug installed or a Number 58. Gap should be .030 inch.
.030
The spark plug may be fouled. Remove the plug and check to see if it needs to be replaced.
compression of a toro s200
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
how to replace plug wire on a toro mower
Champion RJ18Y
Tecumseh Part #611049 - Champion Spark Plug #RCJ8Y
plug gap for toro ccr 3650 is .025
Champion RJ19LM will work.
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.
Get a spark plug socket and wrench that fits the plug body and remove it by turning counter-clockwise.
The correct plug gap for my Toro GTS 6.5 horse mower is 0.035