Markky

Quick update to my current progress. As usual I fizzle out on this project quickly and but it on the back burner until I manage to get the time (or patients) to tinker with it. Today I pulled the motor and started tearing it down. My first discovery was the timing chain was so loose it was crazy. When I turned it over by hand most of the time the chain would just skip right over the sprocket. This makes more sense now because I have spark, compression, and fuel it just is way out of whack timing wise. I plan on continuing the tear down tomorrow and pray I dont find anything else. The chain on the oil pump is very lose too which leads me to believe that the chains they put in these machines are less then desirable. Hopefully I can replace with a better quality timing chain and oil pump chain. Tomorrow I will remove the head and inspect the valves, cylinder head, and piston. Thanks everyone for there help and hopefully this helps someone else.

Sorry you have the same issue. I wish I had better news about mine but I’m still dead in the water myself. I will be trying the boiling water at some point though just to hear it run again. This project has kind of taken a back burner as I’ve almost run out of ideas. If I ever figure it out I will update here! If you end up hearing a fix I would love to know! Thank you!

Thanks Dan, sorry I should of added that there is good spark, fresh plug also. When I first bought the machine I ran it for about three hours and put fresh gas in it. Also added a fuel filter as I read many suggestions to do so. The injectors new. It could be a grounding issue and I’m just looking in the wrong places. If you have any other tips or tricks that would be great! Thanks for taking the time to read this and help it’s much appreciated

So after a few frustrating weeks still no luck. Tested the sensor and seemed to work out with the directions above. Decided to change it anyways with no luck. Checked the whole wiring harness again and found no obvious breaks or faults. Should I just keep throwing parts at it or any more ideas. Appreciate any and all the help.

Can’t thank you guys enough for the responses. Going to tear it down again tomorrow and check all those connections. I’ll let you know how I make out.

Unfortunately I didn’t purchase it new I bought it from an older gentleman that barely drove it. I only have probably 3 hours on the machine myself. I believe it has 70 hours now which seems pretty early to be having serious issues.

Having starting issues on my 2019 Coleman 550. Ive gone over quite a few things including the following Changed fuel injector Checked wiring harness for splits or damaged wires Confirmed compression Confirmed fuel pump operation Confirmed new injector is operational Anyone else have any suggestions. I'm getting an error code "e 118 coolant/oil temperature sensor circuit high voltage or open" also. Would this keep the machine from starting? Thanks

Can’t seem to figure out my Coleman 550 outfitter no start issues. Machine turns over and starts for a brief second and shuts right off. Had error code for fuel injector and has since “been changed. Next code it’s throwing is E 118, coolant/oil temperature sensor circuit high voltage or open”. I believe I’ve located the sensor right near the head of the motor. All wires seem to be clean and tight on the plug end. Any suggestions or has anyone ran into a similar problem. Thanks everyone