|
While you may have a fuel problem troubleshoot this my eliminating the ignition system as the problem first. Run the engine til it stops then check the spark by pulling the center wire out of the distributor cap, holding it near a good round and trying a start. You should see a FAT , BLUISH WHITE SPARK. If it's blue, orangeyor yelowish, that's not good.If you don'thave a FAT BLUISH WHITE SPARK. then you have to find out why. Start with the primary ignition circuit 'cuz that's where the problem usually is. That's the circuit that goes from tha battery, through the key switch to the solenoid to the coil and to the distibutor points to ground. make sure all your connections are "bright and tight", make sure you points are are not oil, pitted ot corroded and adjusted to the correct opening. A poor spark can be helped by a richer mixture because it's easier to ignite a richer mixture with a poor spark. Some times key switches fail and coil's fail. Put a jumper across the key switch and see if the engine starts and runs for longer that a few minutes. Do you have a 6V or a 12V system? if you have a voltmeter, you can check the voltages though the primary ignition citcuit. Make sure the points are closed by clicking the starter over til they are. You have to remove the distributor cap for this. Measure the voltage at each node in the circuit, across the keyswitch across the solenoid connections if you have them on the battery side of the coil and on the distributor side of the coil. You should have near battery voltage to the battery side of the coil and a a very low voltage, but not zero.
If you have the requisite FAT, BLUISH WHITE SPARK, then check the fuel delivery by opening the plug at the bottom of the carb, hlding a suitable container under itwith the tank valve open. The fuel should CONTINUOUSLY gush out like a cow peein' on a flat rock. if it just dribbles or is intermitent, you have inadequate fuel delivery and you need to check the various filter in the fuel delivery system. Also check the vent hole in the fuel cap t make sure i's clear.I'm not familair with the MF35 system, but there is usually a filter in the very top of the tank valve/sediment bowl assembly, there is usually a screen in tha carb fuel inlet elbow. Disconnect the connection at the fuel inlet elbow and repeat the flow test. if you don't get a CONTINUOUS gush of fuel your problem is betwen that point and the tank, look for kinked or clogged fuel lines upstream filters, etc. If you get a gush of fuel, you isolated the problem to the carb. It could be a hung float so rap the side with a block of wood and see if that helps. If it doesn't then you have t remove the carb because either the float valve is cloggeg, the float ain't floatin''cuz it leaks, or there is so much crud in the fuel bowl, the float won't drop. Hope this helps you.
|
