By Randy Stevens
Hey all, I bought a Hisun 550 back in June of 2019. After 6 weeks of ownership, this machine took to sputtering when started and under power. I checked everything I could think of before I took it back to place of purchase....(rural king), since it had a one year warranty. They kept it almost two months stating they were waiting to get info from Hisun to rectify the issue (supposedly faulty drivers seat belt). I was told by the tech that they replace seat belt harness and cured the problem. It did! Ran just fine again for almost a year and now the very same issue has returned. After doing a little investigating on my own, I noticed that rural king did not replace the seat belt harness at all. The wires to seat belt connector was cut and spliced and taped back together. Now I’m not real sure what the real problem is as that tech is no longer with company and can’t seem to locate the past work order for my machine. Hisun customer service is non existent . I’m on my own and begging for help. Im mechanically inclined but if this is an electricical issue, I’m screwed! No warranty left. Any help would be gratefully appreciated.
By Andreas Ahrens
Our Hisun is not making any power. Once you start to climb RPM's it almost sounds like the timing is out, it sputters and farts and doesn't want to climb RPM's at all. It starts fine though.
I checked and set the valves, they were a bit tight but not bad. The spark plug is very black. The exhaust valves are a real nightmare to get to fyi.
On the last service the dealer put the wrong plug in, so I'm switching that back to stock as soon as we get one. I'm also thinking the air filter should be checked/cleaned.
Any other things to check?
I have been going through the troubleshooting in the manual (pages 17-38 and 17-39), but I can't find anything that looks like the picture in the manual. If I run power directly to the pump, it will start and run but otherwise won't start.
Any help to this old nubie will be greatly appreciated. My background is electronics, not vehicles.