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peter,f
05-20-2013, 07:35 AM
trying to start up with hho and it back fires to the flame arrester
and will not start
do i run with gas then add hho and turn off the gas

myoldyourgold
05-20-2013, 09:20 PM
Your problem is most likely the waste spark happening during the exhaust stroke or the spark is to advanced. What happens is that the intake opens before the end of the exhaust stroke and both valves are open for a short time. That waste spark is possibly igniting the HHO. You must have only one spark every second revolution of the crank. Single cylinder small engines spark every revolution of the crank because it is the cheapest way to get a spark. You will also need to change the timing of the spark to after TDC.