Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #1  
Old 09-05-2017, 04:37 PM
jkski jkski is offline
MC Devotee
 
Join Date: Jun 2005
Boat: 2008 40th Anniv. Prostar 197 MCX and Powerslot
Location: Akron, Ohio
Posts: 2,055
Burning rubber smell at 1800 RPM and higher on 08 MCX?

I had a burning rubber smell coming from under the engine cover on my 08 MCX this past weekend whenever I would hit 1800RPM and higher but nothing at idle speed. My temp was holing steady at 160, oil pressure was fine and no bells or whistles or smoke for all that matter. The smell seemed to come from the backside of the engine and I am thinking it may have been one of the exhaust hoses (3 or 4 inch) coming off the cat and leading down to the exhaust pipe. With the engine running, the port side hose did not budge but the starboard side would shake and at one point was slightly compressed when the engine was off, as if someone were squeezing it.

So, has anyone had one of these hoses fail and if so does this describe the symptoms prior to failure? Any other ideas?
I would think these hoses should always remain very rigid and maybe one has just broken down.
Reply With Quote
  #2  
Old 09-05-2017, 05:20 PM
BrianS's Avatar
BrianS BrianS is online now
TT Enthusiast
 
Join Date: Jul 2004
Boat: '08 X14
Location: Dayton, OH
Posts: 393
There is definitely a potential issue with the MCX and exhaust hoses. Check this thread out for more info:

https://www.mastercraft.com/teamtalk...ad.php?t=67725

I ordered new hose and plan to re-plumb mine this winter. No problems yet, but don't plan to wait for it to fail.
Reply With Quote
  #3  
Old 09-05-2017, 05:55 PM
jkski jkski is offline
MC Devotee
 
Join Date: Jun 2005
Boat: 2008 40th Anniv. Prostar 197 MCX and Powerslot
Location: Akron, Ohio
Posts: 2,055
Good call and thanks for the info. This looks and sounds like the likely culprit and a great winter project. Just odd that I have not had any overheating issues and/or problems up to this point
Reply With Quote
  #4  
Old 09-18-2017, 11:39 AM
jkski jkski is offline
MC Devotee
 
Join Date: Jun 2005
Boat: 2008 40th Anniv. Prostar 197 MCX and Powerslot
Location: Akron, Ohio
Posts: 2,055
So, I got the re-plumb kit and tore into everything this weekend. I found where my rubber burning smell was coming from as the very top of the vertical exhaust hose coming off the starboard side was blistered and burned on the inside. It wasn't a very big area, maybe 1 inch but clear enough to create the smell and would have failed had it gone much further.
I have not gotten the boat back on the water yet to test and I am hoping that the re-plumb handles the problem and that a larger blockage type issue is not causing this. I ran water thru the hoses and had it coming out the exhaust so fingers crossed that this takes care of it.

For anyone who is going to do this I will say to be careful with the plastic threaded 90's that go into the manifold and into the CAT as it does not take much to snap them (yes, I snapped 2 off). If your hoses are like mine (original), then just do yourself a favor and cut a slit in them at the fitting to help break them free as the hoses are getting replaced anyways. Tugging, pulling and twisting has a bad result!
Reply With Quote
  #5  
Old 09-18-2017, 01:05 PM
Double D's Avatar
Double D Double D is online now
MC Addict
 
Join Date: Sep 2004
Boat: 1994 Mastercraft, ProStar 205, 350 Indmar with 275 hp
Location: UCLA (Upper Canton, Lower Akron)
Posts: 6,556
Quote:
Originally Posted by jkski View Post
So, I got the re-plumb kit and tore into everything this weekend. I found where my rubber burning smell was coming from as the very top of the vertical exhaust hose coming off the starboard side was blistered and burned on the inside. It wasn't a very big area, maybe 1 inch but clear enough to create the smell and would have failed had it gone much further.
I have not gotten the boat back on the water yet to test and I am hoping that the re-plumb handles the problem and that a larger blockage type issue is not causing this. I ran water thru the hoses and had it coming out the exhaust so fingers crossed that this takes care of it.

For anyone who is going to do this I will say to be careful with the plastic threaded 90's that go into the manifold and into the CAT as it does not take much to snap them (yes, I snapped 2 off). If your hoses are like mine (original), then just do yourself a favor and cut a slit in them at the fitting to help break them free as the hoses are getting replaced anyways. Tugging, pulling and twisting has a bad result!
Hope you got it figured out. I told you those hoses where a batch to get off. I'm still paying for it. Yesterday would have been a great weekend to test it. Beautiful days...
__________________
If its not a competition ski boat, its always second best.

1994 MasterCraft ProStar 205
275 HP 350 Chevy Indmar
Monster Tower & PerfectPass

Check out the MasterCraft Buckeye Bash on Facebook!


"In my many years I have come to a conclusion that one useless man is a shame, two is a law firm and three or more is a congress." - John Adams
Reply With Quote
  #6  
Old 09-18-2017, 04:42 PM
Shawnymac11 Shawnymac11 is offline
TT Regular
 
Join Date: Jul 2012
Boat: 1992 Mastercraft Prostar 190
Location: Midwest
Posts: 83
Quote:
Originally Posted by jkski View Post
So, I got the re-plumb kit and tore into everything this weekend. I found where my rubber burning smell was coming from as the very top of the vertical exhaust hose coming off the starboard side was blistered and burned on the inside. It wasn't a very big area, maybe 1 inch but clear enough to create the smell and would have failed had it gone much further.
I have not gotten the boat back on the water yet to test and I am hoping that the re-plumb handles the problem and that a larger blockage type issue is not causing this. I ran water thru the hoses and had it coming out the exhaust so fingers crossed that this takes care of it.

For anyone who is going to do this I will say to be careful with the plastic threaded 90's that go into the manifold and into the CAT as it does not take much to snap them (yes, I snapped 2 off). If your hoses are like mine (original), then just do yourself a favor and cut a slit in them at the fitting to help break them free as the hoses are getting replaced anyways. Tugging, pulling and twisting has a bad result!

Good work Jeff, hope this fixes it!!
Reply With Quote
  #7  
Old 09-18-2017, 07:32 PM
93Prostar190's Avatar
93Prostar190 93Prostar190 is offline
MC Devotee
 
Join Date: Apr 2005
Boat: 2008 Prostar 214, MCX, Mini-Tower
Location: Central OH
Posts: 2,401
Another great job by the Polish Slalom Master! Good luck and please knock $600 off my offer on your boat, I wanted original fittings. 🙄


Sent from my iPhone using Tapatalk Pro
__________________
Keep a tight line, and a smile on your face. Peace out.
2008 Prostar 214 MCX
Previous 93 Prostar 190 1.5:1 GT40

"Left Foot Forward and preferring girls."
Reply With Quote
  #8  
Old 09-18-2017, 08:31 PM
mike koen mike koen is offline
TT Enthusiast
 
Join Date: May 2015
Boat: mastercraft x-14 2008 mcx
Location: Canada
Posts: 234
Should the replumbing kit be done.I have 503 hrs on my mcx
Reply With Quote
  #9  
Old 09-18-2017, 08:34 PM
BrianS's Avatar
BrianS BrianS is online now
TT Enthusiast
 
Join Date: Jul 2004
Boat: '08 X14
Location: Dayton, OH
Posts: 393
Quote:
Originally Posted by mike koen View Post
Should the replumbing kit be done.I have 503 hrs on my mcx
Check out the thread I linked above. Indmar recommends the re-plumb kit even if you aren't having problems.
Reply With Quote
  #10  
Old 09-18-2017, 10:13 PM
Footin's Avatar
Footin Footin is offline
MC Addict
 
Join Date: Aug 2004
Boat: 2007 Maristar 200VRS X2
Location: Columbus,OH/Monticello,KY
Posts: 5,400
Nice job Jeff, but I'm am quite certain that Josh actually made the repair.
__________________
OH-IO!
Reply With Quote
Reply

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 Off


All times are GMT -4. The time now is 05:47 PM.