For support please email or pm Christopher christopher@snowestonline.com



Upgrade to Premium
Reply
 
Share Thread Tools Display Modes
  #1  
Old 12-13-2015, 12:50 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default Slp 727 motor running poorly

So I just picked up a 08 iqr that was one of Ross martins old sleds, it has a 726 that has had the cylinders reworked and a 727 head put on. When I got it I could t get it to idle right, and no power on the bitten end, found out it had bad crank seals, so I tore it down, replaced crank seals, put it back together and it still won't idle, has 45 pilot jets and 350-360 mains, ( I ride at 6-8k feet) and running it in the shop it is boggy on the bottom but snappy mid to top, and if it idles for more than a few seconds it loads up and is super boggy. Also I noticed that running the engine for about 30 seconds the crank stub where the clutch goes is hot, like can't hold your hand on it for more than a few seconds hot, this doesn't seem right. Sound like a crank problem? I'm trying to decide what to do with this sled. I tried the only lower pilots I had from 45's which were 17.5's I know crazy difference but it didn't seem to make a difference in it loading up. I have also noticed this motor does seem to be a noisier, almost sounds a little like a knock, but when I had the cases apart changing seals I looked at each hearing and didn't notice any heat marks or anything

Last edited by Earthad58; 12-13-2015 at 01:15 AM.
Reply With Quote


Rate this post: Yes | No
  #2  
Old 12-13-2015, 10:08 AM
sled_guy's Avatar
sled_guy sled_guy is offline
Currently: In limbo
Join Date: Jul 2001
Location: Riverton, Utah
Posts: 3,546
Thanks: 0
Thanked 613 Times in 411 Posts
Rep Power: 21474857
sled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond repute
Default

Ok, the hot crank end is NOT a good thing. I was going to guess a bad bearing or poorly lubed bearing causing that. Not easy to heat that much mass up that quickly, something is definitely not right. Do you know what year the motor? The early race motors were greased on the PTO bearing, not oiled is why I'm asking.

IF that PTO bearing is dragging it for sure can cause a poor idle. I've had sleds with bearings that were "sticky" (right before they seized ) that wouldn't idle. Everything else was fine.

Did you look the reeds over closely? One of the first signs of bad reeds, either not sealing good or ends flaking off, is that the sled won't idle and is a dog off idle when you crack the throttle.

sled_guy
__________________
"Sorry, I thought you could ride"
Reply With Quote


Rate this post: Yes | No
  #3  
Old 12-18-2015, 03:53 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default Wellll

Turns out I got the wrong tq specs for the case halves and over torqued it a little and squeezed out any and all three bond so it was sucking air at the case halves, spilt and re sealed and letting sit and dry for two days this time, been real cold here. Hope this solves it, guessing hot crank could have been from being over torqued and running lean, inspected all bearing and crank and everything looks good, keeping fingers crossed
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	82
Size:	312.4 KB
ID:	262381  
Reply With Quote


Rate this post: Yes | No
  #4  
Old 12-18-2015, 09:04 PM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default Still not fixed

Okay still not right. Alright, so I bought a sled with a 600 ves motor that's built into a slp 727, when I got it it wouldn't idle worth a damn and had no bottem end power, found out it had bad crank seals. I tore it down, replaced crank seals, cleaned and re seAled the cases and rejected the carbs since someone tried to bandaid the lean condition with huge pilot jets. I then got it running and same thing, runs terrible, wide open it screams but won't idle at all and loads up and dies, if you pull the choke out halfway it will idle and run better but still boggy on the bottom to mid. I then found the case halves were sucking air so I re split the cases, re sealed, let the three bond cure for 3 days, then put together and same exact problem, I then swapped fuel pumps and noticed that the fuel pump seems to lose prime while running, when revving up a bunch of bubbles appear in the inlet side fuel like at the pump and then the fuel falls back to the tank for a few seconds then catches back up again. I'm at a loss, I'm ready to sell that 727 and buy a dragon 700 and convert it to carbs if I can't get this figured out, anyone experience this before?
Reply With Quote


Rate this post: Yes | No
  #5  
Old 12-19-2015, 12:13 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default

Also it runs great from mid rpms, say 4000+ but with the choke off the minute you get under 4K it's drops off fasttt and then dies, pulled all jets out and blew air through all ports and they were all clean, ran all new fuel line, new floats, changed needle positions, adjusted air screw and fuel screw and nothing seems to make a difference in the way this sled runs, also pulled reeds and cleaned and checked for sealing and they looked great
Reply With Quote


Rate this post: Yes | No
  #6  
Old 12-19-2015, 03:42 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default

Got it narrowed down to the carbs at least, changed out the carbs with some old separate keihn carbs off a 99 700 rmk I had Latin around and it runs great, now I'd like to fix my carbs since they are bored so time to try and figure out what could be causing this
Reply With Quote


Rate this post: Yes | No
  #7  
Old 12-19-2015, 10:56 AM
sled_guy's Avatar
sled_guy sled_guy is offline
Currently: In limbo
Join Date: Jul 2001
Location: Riverton, Utah
Posts: 3,546
Thanks: 0
Thanked 613 Times in 411 Posts
Rep Power: 21474857
sled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond repute
Default

Ok, carbs are bored, let's start there.

For grins, make sure the needle jets were pressed back in correctly. The hood should be open towards the motor. I have actually seen them pressed in backwards. Do you know how big over the carbs were bored? Pull them off and take them in a dark room with a flashlight, shine the light in one side and make sure you don't see light around the sides of the sliders. If they were bored too big or done poorly then they won't be sealing around the edges and can cause leaking which will affect low RPM performance.

When you poked the Keihins on did your air bubble in the gas line issue stop? I ask because I have had several sleds in the past 2 years that the feed line in the tank was cracked/broken from having sit in Ethanol fuel... had to replace them. They would cause funky problems like bad running when the tank wasn't clear full or fuel starve problems.

sled_guy
__________________
"Sorry, I thought you could ride"
Reply With Quote


Rate this post: Yes | No
  #8  
Old 12-21-2015, 02:13 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default

Thanks! Yes the air bubble went away and it runs pretty good with the keihn's, just a little rich. I was just tearing into the minkunis and notices there is a gap on the sides of the slides large enough to put a toothpick through, thought that didn't seem right. I didn't have the carbs bored the sled came with them on it, which I find weird because a buddy owned it before me which he never could get it jetted right, but it didn't run that bad. And the guy before him owned if for years, I'm pretty sure running that setup, I guess he could have swapped carbs before he sold it
Reply With Quote


Rate this post: Yes | No
  #9  
Old 12-21-2015, 02:21 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Default

Nvm that gap doesn't go all the way through, only on one side
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	77
Size:	194.3 KB
ID:	262543  
Reply With Quote


Rate this post: Yes | No
  #10  
Old 12-21-2015, 02:22 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
  #11  
Old 12-21-2015, 02:23 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #12  
Old 12-21-2015, 02:24 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #13  
Old 12-21-2015, 10:55 AM
sled_guy's Avatar
sled_guy sled_guy is offline
Currently: In limbo
Join Date: Jul 2001
Location: Riverton, Utah
Posts: 3,546
Thanks: 0
Thanked 613 Times in 411 Posts
Rep Power: 21474857
sled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #14  
Old 12-22-2015, 12:32 AM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #15  
Old 12-22-2015, 11:13 AM
sled_guy's Avatar
sled_guy sled_guy is offline
Currently: In limbo
Join Date: Jul 2001
Location: Riverton, Utah
Posts: 3,546
Thanks: 0
Thanked 613 Times in 411 Posts
Rep Power: 21474857
sled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond reputesled_guy has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #16  
Old 03-11-2016, 05:43 PM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #17  
Old 03-11-2016, 08:26 PM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #18  
Old 03-12-2016, 10:14 AM
w browning w browning is offline
Currently: doing the snow dance
Join Date: Mar 2009
Age: 65
Posts: 135
Thanks: 21
Thanked 9 Times in 9 Posts
Rep Power: 0
w browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond reputew browning has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #19  
Old 03-12-2016, 08:07 PM
Earthad58 Earthad58 is offline
Currently: Not set.
Join Date: Jul 2013
Basic Member
Age: 32
Posts: 74
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 364757
Earthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond reputeEarthad58 has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Thread — Slp built iqr 155 .. Holtz a arms . Z broz shocks . Easy ryde skid . Slp 727 motor Thread Starter — penny1l Forum — Polaris (Swapmeet) Replies — 1 Last Post — 02-01-2013 05:47 PM
Thread — 2007 Slp 727 motor Thread Starter — McFarckle Forum — Engine/Engine Parts (Swapmeet) Replies — 3 Last Post — 08-13-2011 12:05 PM
Thread — Who's running a SLP 727 kit Thread Starter — snow4321 Forum — Performance/Modified Replies — 12 Last Post — 01-22-2009 04:14 PM
Thread — Polaris SLP 727 Motor For Sale Thread Starter — Fast_XC Forum — Engine/Engine Parts (Swapmeet) Replies — 2 Last Post — 06-27-2008 04:30 PM
Thread — questions about slp 727 motor Thread Starter — bontuck78 Forum — Polaris Replies — 2 Last Post — 03-04-2008 10:28 AM

All times are GMT -6. The time now is 07:59 AM.