If oil/gas mix is run thru a four cycle engine , id suspect the plug is fouled with oil , this may require replacement once your sure all the oil is out of machine completly
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Hi Jerome:
Shouldn't be too bad.
You could disconnect the fuel line at the carb and drain the tank.
Drain and flush the carb. Reconnect the fuel line and fill with fresh gas.
If it won't start, pull the spark plug and clean/dry it with a propane torch, or replace it.
Odds are it will be fine.
Cheers.
Drain your fuel tank first. Then mix 50/50 parts mixing oil and fresh gas. Put fresh gas into the saw as well as putting in a new spark plug and start it up. Stale gas (gas that has sat in the tank or gas jug for an extended period of time), bad gas or water in the gas will cause it to rough idle and back fire.
Most always this is a build-up, or manifestation of either flat or old gas, gas with too much oil mixed in, or good old H2O in the storage gas container that runs into the power tool as the supplying tank gets a bit low, or gets shaken before filling-up the blower. Completely empty the blower of fuel. If you are not capable, then have someone remove thewater and/or debris from the carb. inside the blower. or Empyt all fuel in the tank then remove the plug and give it "200" pulls, then replace the plug and give it "100" more. This will sometimes move the trash through if you cannot have it professionally repaired. Replace ALL old fuel with new, properly mixed fuel.
Hi ! a easy way to possibly help this is to get a can of sea foam at the parts store and dump it in your tank it may help dissolve any goop that is in there and it helps renew bad gas ,also if this does not help remove your fuel filter and blow through it it may now have gotten a bit gumped up ,not a bad idea if you havnt done that for a few years anyway ,mostly the sea foam should help!
Dump the gas and start over, pour some chem-tool in the tank slosh it around for a wile and dump it out, then refill your saw with NEW PREMIUM GAS and NEW OIL mixed at the correct ratio, it will take a few minutes to get the old fuel out of the line but then it will run like new, Gas and oil goes bad faster these days as oil company's no longer put in as much if any stableizer's
Start with emptying the gas tank totally. Refill with fresh gas/oil mix. Todays gasoline ain't that great.
Also after putting in fresh gas and priming if it doesn't fire at all pull the spark plug and if it is dry, pour a about a tbsp. of mix gas in the plug hole. put the spark plug back in and see if it will fire.
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