Those are almost all the possible issues that are causing your Predator 212 or any other small engine to not start. This issue can be due to a faulty camshaft. Basically, the timing might be set such that the exhaust and intake are open at the same time for long durations and the air-fuel mix enters and then leaves unburnt. If the compression is low, valve opening and closing timings can also cause this issue. If there is no pushrod then the valves won’t open, so even if there is compression pressure, the exhaust air or new air won’t go anywhere and the engine won’t run. You need to check whether or not the engine has a push rod for both intake and exhaust valves. There might even be a manufacturing defect, where they have sent the engine with some components missing. Open up the cylinder head and see if the valves are working properly. You have compression, the air-fuel mix is correct and the spark plug is firing. Check if the valves are working properlyįinally, if everything checks out. Another reason could be the valve’s timing (more on that in the next step) 6. This can be due to the piston ring being worn out or the head gasket being worn out. Ok so let’s say you did the testing and found the pressure is low or not there at all. If there is no pressure then you can be sure that the problem is with compression. A big drop can.Ī quick but less accurate way to test compression is by holding your thumb in the spark plug position and feeling the pressure. The compression pressure should be ideally 80-100 psi, however, a little less won’t cause the engine to not run at all. ![]() Now when you pull to start the engine, the gauge will indicate the pressure. Here’s a video from “Metal In Motion Shop” showing how to check compression.īasically, you’ll need to take a compression tester kit and put it in place of the spark plug. We have a separate article for the no spark situation. You can check if you have no spark by pulling out the spark plug (along with the boot), grounding the end of the plug & try to turn on the engine. It is possible that the engine’s cylinder is getting the air and fuel but their is no spark to ignite the air-fuel mixture. Check if your Spark Plug is working Properly However, let’s say you did spray the starter fluid (Step 2) and the engine still didn’t start, then read on. This will very very likely solve your problem, almost 90% of the time it’s just the jets getting clogged due to the engine sitting in your garage for far too long with fuel inside the bowl. If you can still see the debris then take a thin wire and run it through the holes. Take a carburetor cleaner and blow it through the holes of the main jet and the pilot jet a few times. There is also an emulsion tube under the main jet, it’s a good idea to take it out and clean that with the jets but it isn’t necessary. You’ll need to use a flat head screwdriver to take out the main jet. Here’s a Step by step process of Troubleshooting this problem: If it is brand new, you can get the engine replaced in your local Harbor Freight Store which is what I recommend you to do since manufacturing defects will require more work to fix.īefore you check anything though, just make sure that your gas tank has gas and the fuel lines are working properly and that the fuel shut-off valve isn’t closed. ![]() However, if your Predator is brand new and still doesn’t starts then this can be due to a manufacturing defect. I have covered almost all the potential problems in this article. On rare occasions, you might have a compression issue or the transmission system might be locking up the crankshaft. In some cases, the ignition coil or spark plug could be damaged which means the engine doesn’t ignite the spark required to burn the air-fuel mix. This is usually due to the main jet of the carburetor getting clogged. 8 out of 10 times, the carburetor is not providing the engine with enough fuel which is causing this problem. This is a very common problem to come across if you haven’t run the engine for a long time.
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