Quantcast
Jump to content


Coleman 550 Loose Timing Chain

Copperline

By Copperline
in Coleman UTV SxS Forum

 Share

Recommended Posts

Copperline Newbie

Copperline

Posted
Posted

I have a Coleman 550 (hisun). Wouldnt start and was sucking instead of blowing through the spark plug hole. Got to the timing chain and it was very loose and for sure the timing was way off. Got the tensioner off and set it to TDC and got the cam gear back aligned. Put the chain back on and set the tensioner as instructed and the chain is still very loose. I extended the tensioner as far as it would go to test and the chain is still loose. 

Any ideas what could be broken or wrong? Why would the chain be so loose?

 

 

  • Alex changed the title to Coleman 550 Loose Timing Chain
Travis Grand Master

Travis

Posted
Posted
9 hours ago, Copperline said:

I think you are right. 

I'm just getting into the process of replacing it and struggling to get the flywheel nut off. 

get some paracord or small rope, remove a spark plug, insert the rope into the plug hole until the cylinder is full (won't take anymore), remove the nut.

i've used this method many many times.

Copperline Newbie

Copperline

Posted
  • Author
Posted

I ended up just fabricating a tool to make it work. A 16" pice of thick steel plate about 4 inches tall. Drilled a big hole about 3" from one end to allow the socket to fit and then two outside holes to put long bolts into the flywheel (I removed two of the flywheel allen bolts). This allows the tool to jam against the frame of the cart and I was able to remove the nut easily with no damage. 

  • Like 1
aefron88 Community Regular

aefron88

Posted
Posted
On 1/15/2023 at 9:54 AM, Travis said:

Wild guess would be that the chain has stretched from heat and wear. Hisun isn't exactly the industry leader in quality parts.

Yep likely stretched. Buy a new chain and compare lengths and I bet the new one is shorter.

Copperline Newbie

Copperline

Posted
  • Author
Posted

I replaced the timing chain as well as the oil chain. Hopefully that does it. Working on this inside the frame has been horrible. I cracked an oil gear tooth trying to keep the engine from turning while trying to get the flywheel off. Two years is really too short of a time to have to be tearing this apart for chains. 

  • 3 months later...
Copperline Newbie

Copperline

Posted
  • Author
Posted

107 hours. 

Make sure you change the oil chain while you are in there.

It was a horrible process. Lots of home made tools because I did it with the engine still in the cart. 

Unreal that the chains are such garbage to crap out at 100 hours. The cart still looks brand new.

Be careful re-fitting the case cover that its flush before you start tightening the bolts. There are so many possible catch points (water pump) that you might think its on and start tightening and then CRACK as you crack the case. As me how I know!

 

 

 

Eppa Wimbish Newbie

Eppa Wimbish

Posted
Posted
16 minutes ago, Copperline said:

107 hours. 

Make sure you change the oil chain while you are in there.

It was a horrible process. Lots of home made tools because I did it with the engine still in the cart. 

Unreal that the chains are such garbage to crap out at 100 hours. The cart still looks brand new.

Be careful re-fitting the case cover that its flush before you start tightening the bolts. There are so many possible catch points (water pump) that you might think its on and start tightening and then CRACK as you crack the case. As me how I know!

Thanks for responding.  The one here shows 200 hrs.  The chain is sloppy loose with the tensioner at full extension.  I've told the owner that it makes no sense to do all the work necessary to replace both chains, as there's no reason to think the new chains will be an improvement over the current ones....  The chain appears to be too small for the application, as it is much smaller than motorcycle timing chains, but about the size of 50cc scooter chains.  In any case, I won't consider trying to do that work with the engine still in place......

 

 

 

  • 9 months later...
TripleBRanch Newbie

TripleBRanch

Posted
Posted
On 1/29/2023 at 6:25 AM, Copperline said:

I replaced the timing chain as well as the oil chain. Hopefully that does it. Working on this inside the frame has been horrible. I cracked an oil gear tooth trying to keep the engine from turning while trying to get the flywheel off. Two years is really too short of a time to have to be tearing this apart for chains. 

Where were you able to find the 2 chains. I found a couple places that have the timing chain at ridiculous prices and one place for the oil pump chain but not SURE it’s the right chain. Ideas?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Similar Topics

    • Homeowner A
      Coleman UT 400 Garage?
      By Homeowner A
      I have a Coleman UTV 400 and looking for something to store it in.  Preferably something vinyl or plastic with its own base that can stand alone outside and house the UTV.  I think the dimensions of the UT400 are around 106" long 52" wide and 74" tall. 
      What should I consider that won't break the bank?    
    • Cory J
      2023 t-boss 550 belt slipping and found oil in belt housing
      By Cory J
      Belt started slipping when I used it in high gear. It works okay in low unless I'm trying to power it up a hill and then it slips.., Ordered a new belt and went to change it and found a good bit of oil in the belt housing. Has anyone experienced this? Belt looks fine. Only have 300 miles on this thing..
    • Ductking1
      2024 Hisun Sector 550 gear sector binding
      By Ductking1
      I recently purchased a 2024 Hisun 550 Sector from Kreps Service Station and am having issues with the gear selector, I am doing as instructed in the owners manual but the shifter acts like it is binding or the button lock isn't releasing, the shifter will not move, I have to wiggle it back and forth while pushing hard on the brake and if it's in park or reverse it's nearly impossible to get it to move, I contacted Justin Krep and he says this is normal with these machines, I find that hard to believe, I've owned many utvs and side x sides and have never had this kind of issue with any of them, any help with this problem would be greatly appreciated.
    • hisun junk
      2017 Cub Cadet Challenger 750 hisun junk motor
      By hisun junk
      As I tried to do a conversion with the Yamaha 660 motor, I realized the 660 was never fuel injected so it would not work for the fuel injected hisun motor swap. But the good thing is the hisun 750 motor is a clone of the 660 Yamaha but with the components for the fuel injection (cam/crank position sensor). So that left me with a new rebuilt Yamaha 660 and still a broke 750 hisun motor. I took apart 750 think the timing chain had broke from all that I've heard about these motors. The chain was not broke, but just off cam and crank gears! The chain tensioner was at fault!  I've ordered Yamaha 660 replacement parts, chain, two exhaust valves (which got bent when chain came off while motor was spinning) and seals. The piston has 2 little nicks where it had hit valves but no damage otherwise. The head is being redone at the machine shop and I'll be putting it back together in the next couple of weeks. Also I finally tracked down a Service Manual with all the info on the 550/750 Challenger.

    • JSwearer
      T-Boss 550 aftermarket suspension suggestions
      By JSwearer
      Does anyone have any suggestions for aftermarket shocks.  I have a T-Boss 550 and took it riding in some rough trails and the stock suspension was uncomfortably rough.
      Thanks

UTV FORUMS

MORE SECTIONS

FOLLOW US ON

GET IN TOUCH

  • Automotive Webmaster
×
×
  • Create New...