Have1972 ford gas tractor won,t start got gas in carb. spark fronspark plugs but wont fire. what is wrong is it the carb? have new gaskets on intake and on carb.
Nobody has messed around with the ignition timing in any way?
If it has stood for a long time(i.e years..) the fuel may have degraded to the point that it\'s useless.
The carbs will smell of fuel, but are you sure that fuel is being pumped to them in sufficient quantity? Try disconnecting a fuel line, crank the engine a few revolutions to see if fuel is pumped out.
Try gravity feeding the carbs. Use a can of fuel connected to the carbs, held above the engine. Get somebody to crank the engine and see if it fires up. If the engine fires up, suspect the fuel pump.. or fuel lines.
An air leak can also cause non-starting. The usual cause is the inlet manifold gasket. Any air leaking through the gasket can cause your non-starting problem. Go back and check that no dirt has been picked up by the gasket before you fitted it/it hasn\'t been ripped. Check that the inlet manifold has been correctly tightened.
It doesn\'t sound as though you have much of a problem .. more of a \'niggle\'.
The link is for Zenith carburettors:
Zenith carburetor Google Search
timing has been changed one says 3 degrees of center another says TDC,the setting has beeing changed 50-60 times trying to get right setting. remember this is a tractor not a car. the intake gasket has been change new fule pump keep carb. till gas was coming out of gas line then hooked carb. up.
I'm not familiar with tractors at all, but rthe smae principle applies to them as does to cars.
ok. Has the timing been altered in any way? Too far adanced or too far retarded may cause starting problems. With a car, I would loosen the distributor clamp bolt, get somebopdy to crank the engine while I slowly turn the distributor one way then the other ... until the engine fires. You won\'t have to turn the distributor very much.
The VALVE timing hasn't been touched? Ignition timing and valve timing are 2 different things. If you've removed the timing chain or latered the position of the timing chain wheel .. that's the valve timing
The rule of thumb ... If you have a spark .. ok. Fuel getting into cylinder .. fine. Valve timing hasn't been touched? May be an air leak. try spraying a penetarating oil around the intake manifold area while somebody spins the engine, If there's an air leak, the oil will be drawn in via the leak and appear out of ther exhaust as a cloud of blue smoke.
Umm ... remove the plugs and try pouring fuel directly into each cylinder. Replace the plugs ,,, does it seems as though it may fire/start to fire for a couple of seconds?
did you touch the ht leads to the plugs? The firing order may be incorrect ..
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