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well you cant damage it by doing that but if you put too much n and didnt shake it well it will settle at the bottom of the fuel tank and fill the carburettor up with oil as oil is heavier than petrol.why are you not using the oil tank and oil pump fitted to the bike ?best thing to do is put a new spark plug in it turn the fuel tap off roci the bike bacwards and firwards to mix the oil and fuel in the tank,and drain the carburettor by undoing the 14mm nut in the centre of the bottom of the carb,then turn the fuel back on and try and start it up.
It certainly sounds like the needle valve is stuck.
If it is a gravity feed fuel system and a normal carburettor it sounds a particularly bad design not being equipped with a petrol tap to isolate the supply when the machine isn't in use. Gravity fed designs without a fuel tap would typically place the fuel level below the engine inlet ports to prevent that potentially dangerous and/or expensive type of flooding. The surplus fuel would then run from the carburettor float chamber vent which if it presented any immediate danger would be piped away.
As part of the investigation and repair it would be a good idea to change the engine oil.
carburetor have a setting level for its fuel , check the floating control adjust fuel level , also check spark plug current is there,just by rotating engine and keeping spark plug out of cylinder , just keeping it with engine body.
Spray some starting fluid in the airbox inlet while cranking the engine with the throttle open. If it starts for a few seconds, your problem is with the fuel. If it does not fire still, You need to check for spark at the spark plugs
drain your carburettor from the site check your spark plugs and wash it with petrol start the engine rev 5 to 6 times and memorise the result of it,remove air filter and spray carburettor with engine start and rev the engine up to 3000 rpm or more if you have results at last your problem lies with fuel pressure and quality petrol super with fuel injection cleaner is going to help .you.
If you're getting fuel and spark, it should start assuming you also have compression. Try putting in a fresh plug; sometimes a plug will appear to have spark when you test it and wont spark under pressure.
Ideally saws should be stored in cool conditions out of the sun to prevent pressure building up and with the tank lower than the engine. Drain the tank also and run the engine dry, as when the fuel evaporates, it leaves a varnish residue which coats the small pasageways in the carburettor. It is possible that the fuel pump diaphragm in the carburettor is punctured and this is allowing fuel to seep into the saw
Hi Mark try spraying some starting fluid in the intake.You asked about putting petrol in the carburettor...your 1992 Saab has a carburettor? Impossible.That vehicle is fuel injected.Spray the starting fluid lightly or you'll flood the engine.
Don't use cold start.it will not solve your problem.Try running it with out the air cleaners ,it may be that you have an air intake problem and not getting the right Air / fuel mixture .
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