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Latest Posts
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I pulled the injectors and they would not cycle so I removed them from the manifold and they were full of varnish in chunks, I have them soaking in injector cleaner. Do you know what voltage the injectors work on? is it 12 volts? -
If you can't clean the injectors, then don't limit your search to Joyner only engines. John Deere and KawasakI and other lesser known brands use the 3-cyl version of your SQR472 engine. But you might end up buying 6 injectors They might be sold in packs of 3) if you can't buy them individually to get the four you need. You'll just have two spares. -
First test all fuses in the fuse box to be sure they are good. Use a tester or simple 12v bulb & wire. Then run a spark test to be sure you are actually getting spark at the plugs. It is my understanding from others that these Hisun injectors are very finicky about any dirt or gum in them. Some of the Hisun based models came from the factory without an in line fuel filter and had starting and running issues resolved only by installing a filer and replacement of the injector. Sitting for a long time would be my prime suspect in that the fuel if any in the injectors may gel or dry up leaving them inoperative. Since the machine has been sitting maybe the best thing to do is replace the injectors regardless. But that's your call. -
On the schematic I'm looking at (which may or may not apply to our Trooper), the injectors get battery voltage from the main relay through a 15 amp fuse and a relay. The main relay is energized by the ignition switch in the run & start positions. The injectors get a short duration pluse that might show on an LED circuit tester. Incandescent lights can't react fast enough. But will appear on an oscilloscope (that many may not have available). If you can find a way to see that pulse, it will tell you if the injetors should be working. If the pulse is there, the injectors are bad.
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It starts and runs on starting fluid, so I know everything else is working, just no fuel.
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