Swede InTexas

On 2/22/2022 at 5:55 PM, Swede InTexas said:

My Coleman 400 UTV has 25 hrs on it, same starting problems, took it to authorized repair center, they found broken piston rings that were causing fouling of plugs,  Broken rings cause engine failure, now waiting for engine replacement.  Still under warranty, had it for three months.

My Coleman is still in the repair shop waiting for Coleman to pay for replacing the engine.  It's now May 12, 2022.  It seems they are slow in paying for dealer repairs under warranty.

I Whish I had my UT400 out of the repair shop, bought it in October, Engine piston rings failed after Christmas and destroyed the engine, had only 25 hrs on it, had gasoline problems leaking, then oil fowling sparkplug, after that engine wouldn't start.

Had mine 25 hrs, piston rings broke caused engine failure, in shop waiting for new engine.  Still under one year warranty!

When failure started I found fouled spark plugs, very dirty looking, then changed to new plugs, but failure soon followed.

On 1/4/2022 at 12:13 PM, jatchis said:

I'm having a similar issue with my Coleman UT400, but it started after we left it out in the rain over night (we usually keep it in the garage). We were expecting a large delivery, so needed the garage space for a couple days, and got an unexpected rain shower.  When I went to bring it back inside, it turned over fine, but would not fire. I ordered/replaced the CDI, voltage regulator, and coil and still would not start.  Cleaned the plug, and it fired right up ... this time. After a few short runs, it quit starting again. The plug was wet fouled with fuel. The same NGK DR8EA as mentioned above. I picked up a couple new ones, but now I have to rotate those in about every 3 starts ... either it won't start, or shortly after starting, it will stall and not refire. Also, when a new/clean plug (I clean them with alcohol and then sandblast them real quick) is put in, it will crank in a couple of seconds, but subsequent attempts will take running the starter motor for 10-15 seconds before it fires. Googling brought me to a page that said Hisuns were bad about bad/dirty injectors causing fouling (I have always run premium with stabilizer in it), so I ordered and replaced the injector too but experienced the exact same issue. Seems like the next thing to try would be the ECU, but that's a little pricey, so I'm hoping for other suggestions before I go there. Now, I did try a hotter plug (DR7EA) and it seems to not foul as quickly, but from the get-go it has taken a lot of cranking on the starter to get it to start up, but seems to run better once started.

My Coleman 400 UTV has 25 hrs on it, same starting problems, took it to authorized repair center, they found broken piston rings that were causing fouling of plugs,  Broken rings cause engine failure, now waiting for engine replacement.  Still under warranty, had it for three months.