The choke on symbol for most small engines looks like a horizontal ( — ) or diagonal ( / ) line. It also can simply say 'Choke', 'Full Choke', or 'Start'. The off symbol for most small engine chokes is represented by a vertical line ( | ) or the word 'Run'.
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On a carbureted engine the FuelTech ECU can be used to control functions other than fuel delivery such as timing control, datalogging, boost control, nitrous control, and drag racing traction control.
This tool makes it simple to check fuel injectors in EFI systems to see if they are getting an electrical signal. Just plug in the correct Noid light and start the engine. If the light flashes, there is current flowing to the injector solenoid.
Eventually, the know-how gained in the development of this engine would form the base for subsequent development of the 3-cylinder and 2-cylinder snowmobile engines. This 4-cylinder engine underwent its next evolution in 2006 for the Apex model. The new engine gained fuel injection and a much lighter crankshaft design.
It appears that the ECD (Electronic Controlled Diesel) fuse is used for supplying power to the diesel on /off solenoid (should be fitted to the diesel pump) and possibly also for supplying power to the glow plugs.21 Dec 2013