Go Back  Offshoreonly.com > Owners Forum > Baja
Questions about a 502 mpi vapor locking?? >

Questions about a 502 mpi vapor locking??

Notices

Questions about a 502 mpi vapor locking??

Thread Tools
 
Old 09-02-2008 | 08:22 AM
  #1  
sdw's Avatar
sdw
Thread Starter
Registered
 
Joined: Feb 2005
Posts: 25
Likes: 0
From: Eldorado, IL
Default Questions about a 502 mpi vapor locking??

I have a 2001 baja 36 outlaw with 502 mags mpi, bought the boat last august and starting to have, I think vapor lock problems. It seems to be getting progressively worse. any help or things to check would be appreciated.
sdw is offline  
Reply
Old 09-02-2008 | 09:41 AM
  #2  
Dock Holiday's Avatar
Charter Member #34
 
Joined: Oct 2000
Posts: 7,151
Likes: 2
From: Beautiful North Carolina
Default

Keep your fuel lines as cool as possible. The 502's for some reason were worse then others about doing this. The fuel system in down low in front of the motor and it gets hot. I had a friends install stainless steel braided lines and they were even worse. If that has been done in your boat go back to black rubber fuel lines. Also the fuel return goes back to the pump and hot fuel in reintroduced to the motors. You can return the fuel back to the tank and it will help solve the problem.

Learn where the Schrader Valve is and how to use it in case they will not restart. It is under the plemium and looks like a valve on a tire.

Last open the engine hatch when you are stopped and let the heat out.

Good luck
Dock Holiday is offline  
Reply
Old 09-02-2008 | 09:45 AM
  #3  
eddie's Avatar
Platinum Member
15 Year Member
Platinum Member
 
Joined: Oct 2007
Posts: 2,256
Likes: 21
From: Osage Beach, Missouri - 28mm
Default

Merc has a vapor lock kit to fix the problem. Call Brett at PBC with your serial numbers (402-464-4791), I've put them on two Baja's I've owned - the 454 Mag's and 502 Mags both have this problem. After you put the kits on you will never have this problem again.
eddie is offline  
Reply
Old 09-02-2008 | 10:12 AM
  #4  
sdw's Avatar
sdw
Thread Starter
Registered
 
Joined: Feb 2005
Posts: 25
Likes: 0
From: Eldorado, IL
Default

Thanks for the info. Is the kit for both motors or just one??
sdw is offline  
Reply
Old 09-02-2008 | 10:47 AM
  #5  
eddie's Avatar
Platinum Member
15 Year Member
Platinum Member
 
Joined: Oct 2007
Posts: 2,256
Likes: 21
From: Osage Beach, Missouri - 28mm
Default

Originally Posted by sdw
Thanks for the info. Is the kit for both motors or just one??
You need a kit for each motor, it's plug and play pretty easy to install if you have done some wrenching.
eddie is offline  
Reply
Old 09-02-2008 | 11:04 AM
  #6  
BrettM's Avatar
Offshoreonly Advertiser
15 Year Member
Offshoreonly Advertiser
Commercial Members
 
Joined: Oct 2007
Posts: 801
Likes: 83
From: LOTO/Performance Boat Center
Default

I have the kits in stock and ready to ship out!

Brett
402-464-4791
BrettM is offline  
Reply
Old 09-02-2008 | 05:09 PM
  #7  
Quinlan's Avatar
VIP Member
20 Year Member
VIP Member
 
Joined: Jul 2003
Posts: 4,278
Likes: 772
From: Tulsa, GLOC
Default

Just ordered mine. Thanks for the info guys.
Quinlan
Quinlan is offline  
Reply
Old 09-03-2008 | 09:08 AM
  #8  
BrettM's Avatar
Offshoreonly Advertiser
15 Year Member
Offshoreonly Advertiser
Commercial Members
 
Joined: Oct 2007
Posts: 801
Likes: 83
From: LOTO/Performance Boat Center
Default

OKoutlaw, UPS has your pumps, thanks for the business!
BrettM is offline  
Reply
Old 09-03-2008 | 06:34 PM
  #9  
Registered
 
Joined: Apr 2008
Posts: 22
Likes: 0
From: Osage Beach Mo
Default

Order my kits today. This problems seems to be getting worse throughout us boaters
outlaw 32 is offline  
Reply
Old 09-06-2008 | 03:02 AM
  #10  
Registered
 
Joined: Oct 2006
Posts: 54
Likes: 0
Default

Yep it is and a frustrating problem to diagnose and then convince a seemingly intelligent person his fuel is evaporating in a standard boat.The kit works a treat
olmo40 is offline  
Reply


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.