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?

 

 

Link to comment
Share on other sites
  • 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.

Link to comment
Share on other sites
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
Link to comment
Share on other sites
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. 

Link to comment
Share on other sites
  • 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!

 

 

 

Link to comment
Share on other sites
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......

 

 

 

Link to comment
Share on other sites
  • 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?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing

  • Similar Topics

    • tipoblanco
      Bighorn 550
      By tipoblanco
      Just purchased the  Bighorn 550 explorer,after the breakin period what engine oil and diff fluid are you using?ive read about using a motorcycle engine oil or just a 10w40 blend?and differentials,states a 80/90 gl5,is there something preferred over another?is there a better spark plug than the K6RTC? just want to start out doing it correctly,im a true believer in proper maintenance,thanks for any contribution
    • Goat Quilter
      Coleman utv 400 loses power uphill
      By Goat Quilter
      We pout new belts cleaned engine and carburetor plugs you name it.  Drove down road no problem came back uphill no power won’t go . What’s the issue? 
       
      could it be clutch? 
       
      frustrated in shop more than in use on farm 
    • weasel
      Coleman 400 UTV fuel issue
      By weasel
      starts up you have keep rpms up for 5 minutes till it warms up then runs fine. But if it stalls wont start unless you unplug fuel pump and hold it to the floor till it starts then plug pump back in and run it till it warms up then it is fine all day.
    • hisun junk
      Challenger 750 - junk hisun motors!
      By hisun junk
      I have a 2018 cub cadet challenger 750 with a broke chinese hisun motor and I know that I'm not alone! Almost all the places that were selling them in Colorado don't anymore due to the return for repairs on the clutches and broken timing chains! Don't have yours fixed because it will happen again! They just replace the broken parts with more junk chinese parts! I talked with a UTV mechanic that has replaced one person's clutch 4 times! I have people contacting cub cadet about these problems and also looking into complete motor replacement from hisun junk to a Japanese motor in which the chinese cloned their junk from.
    • Goat Quilter
      Coleman utv loses power uphill
      By Goat Quilter
      New belts and engine cleaned and checked carburetor cleaned drove on flat ground fine turned to go up hill lost power wouldn’t go 
      Could it be clutch issue?? 

      so frustrating this thing has been in shop more than used on our farm. 
       

UTV FORUMS

MORE SECTIONS

FOLLOW US ON

GET IN TOUCH

  • Automotive Webmaster
×
×
  • Create New...