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



Upgrade to Premium
Reply
 
Share Thread Tools Display Modes
  #1  
Old 04-14-2018, 08:44 PM
wanderingleif wanderingleif is offline
Currently: Payin for parts and praying for SNOW!!!
Join Date: Nov 2011
Location: Bozeman MT
Age: 41
Posts: 59
Thanks: 46
Thanked 7 Times in 7 Posts
Rep Power: 1097194
wanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond repute
Default 16 XM 800 ETEC Lost Compression

New to the ETEC's, picked up a 16' with 2400 miles. As far as i could tell it ran like a top! Rode it twice no problem lots of power. Found it has a exhaust leak at the manifold to head due to a missing bolt made appropriate repair and 20 miles into Cooke City lost all compression on the Mag side. Plug looked a little oily but not covered with metal fragments or anything. I have not torn it down yet. Looking for any input or thoughts to start me in the right direction. Thanks
Reply With Quote


Rate this post: Yes | No
  #2  
Old 04-15-2018, 03:39 PM
sledsrock sledsrock is offline
Currently: SUMMER SUCKS!
Join Date: Nov 2007
Location: Grand Junction, Co.
Posts: 1,826
Thanks: 461
Thanked 328 Times in 247 Posts
Rep Power: 0
sledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond reputesledsrock has a reputation beyond repute
Default

A leak down test before you open it up would be the most proper way to start. If it were me, I’d drop a borescope down in the spark plug hole and see what things look like or just pull the head and look.
Reply With Quote


Rate this post: Yes | No
The Following User Says Thank You to sledsrock For This Useful Post:
wanderingleif (04-16-2018)
  #3  
Old 04-17-2018, 03:17 PM
FEZ FEZ is offline
Currently: Mechanic for and Advisor to SHR
Join Date: Nov 2007
Location: Minnesota
Basic Member
Age: 48
Posts: 552
Thanks: 43
Thanked 101 Times in 80 Posts
Rep Power: 6649661
FEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond reputeFEZ has a reputation beyond repute
Default

Check fuel pressure. The fuel pressure regulator can dis-lodge from the housing causing a drop in fuel pressure which can possibly lead to a lean condition. While you are at it, replace the fuel filter. I am going to assume you verified all 8 Y-Pipe bolts are in place after repairs.








The drain what fuel you can and replace with fresh along with a bottle of iso to eliminate possible water in the fuel.




Finally, when the piston is out, take a pic and post it.
Reply With Quote


Rate this post: Yes | No
The Following User Says Thank You to FEZ For This Useful Post:
wanderingleif (04-18-2018)
  #4  
Old 04-18-2018, 09:18 PM
wanderingleif wanderingleif is offline
Currently: Payin for parts and praying for SNOW!!!
Join Date: Nov 2011
Location: Bozeman MT
Age: 41
Posts: 59
Thanks: 46
Thanked 7 Times in 7 Posts
Rep Power: 1097194
wanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond reputewanderingleif has a reputation beyond repute
Default

All y-pipe bolts present and accounted for. I assume your suggesting possible low fuel pressure could cause the cylinder to burn down? I'm gonna open it up this weekend. I'm guessing ill find either a stuck ring or cylinder lining that has been worn away? I've worked on cars/trucks my whole life but 2-strokes are relativity new to me..... Ill post some picks of my discovery.
Reply With Quote


Rate this post: Yes | No
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 — Lost Compression!! Thread Starter — theslednutz.com Forum — Performance/Modified Replies — 4 Last Post — 12-18-2008 11:41 PM
Thread — Lost compression Thread Starter — Summit97 Forum — Performance/Modified Replies — 3 Last Post — 12-17-2007 03:22 AM
Thread — Lost compression Thread Starter — Summit97 Forum — General Snowmobiling Replies — 1 Last Post — 12-17-2007 12:04 AM
Thread — Lost compression!! Thread Starter — Summit97 Forum — Ski-Doo Replies — 1 Last Post — 12-15-2007 03:13 PM

All times are GMT -6. The time now is 09:57 AM.

no new posts