Like Tree0Likes

Help possible vapor lock????

Reply
Old 06-19-2006, 09:35 AM
  #1
Registered
Thread Starter
 
Join Date: Feb 2001
Location: Norwalk, CT 06850
Posts: 81
Default Help possible vapor lock????

I have a 1999 330 SS (7.4MPI'S) and I ran over to Long Island yesterday and the boat ran fine no issues or anything, on the way home the boat started up fine and ran perfect, I got to the end of the no wake zone and it started off fine got going and then the tahc started surging and then I lost power and it would die down to like 800 RPM's....then stall. I would shut it down and then I could get a blast out of both motors for 20 seconds and then it would do the same thing. The other motor ran fine, I then swaped the fuel filter from one motor to the other to see if it would make a difference, then neither motor started, I got in there and cranked the filter tighter and the bad motor that wasn't running before now ran perfect and I couldn't start the good motor. Is this vapor Lock??? Any suggestions would be appreciated. Thanks in advance.
Donzi26ZX is offline  
Reply With Quote
Old 06-19-2006, 10:46 AM
  #2
Registered
 
Join Date: Jul 2005
Location: Tierra Verde, Fl
My Boats: 33 Outlaw
Posts: 341
Default Re: Help possible vapor lock????

That sure sounds like vapor lock to me.
Skullkrusher is offline  
Reply With Quote
Old 06-19-2006, 10:51 AM
  #3
Registered
Thread Starter
 
Join Date: Feb 2001
Location: Norwalk, CT 06850
Posts: 81
Default Re: Help possible vapor lock????

What do I have to do to fix it or will it be fine next time I go to run the boat?
Donzi26ZX is offline  
Reply With Quote
Old 06-19-2006, 12:37 PM
  #4
SORE MEMBER
Platinum Member
 
Wobble's Avatar
 
Join Date: Apr 2004
Location: 2950'49.74"N 95 5'17.55"W.......TEXAS
My Boats: SeaDoo RXP & RXP-X, Stryker Equalizer 28, Eliminator Daytona Jet
Posts: 6,709
Default Re: Help possible vapor lock????

could also be water in the fuel, empty the fuel filters into a glass container and let it stand for a minute, if it's water you will see it at the bottom.
Wobble is offline  
Reply With Quote
Old 06-19-2006, 01:07 PM
  #5
Registered
 
fund razor's Avatar
 
Join Date: Mar 2004
My Boats: Apache 28 Brave
Posts: 8,170
Default Re: Help possible vapor lock????

Quote:
Originally Posted by Wobble
could also be water in the fuel, empty the fuel filters into a glass container and let it stand for a minute, if it's water you will see it at the bottom.
That's exactly what I was thinking... happened to me with a merc260 and every time the bow started to rise the water in the filter would cut off the fuel and it would die.

The thing is... if you empty the water/fuel separator or put in a new one... you need to pre-fill it with some fuel or it will take forever to get it started.
fund razor is offline  
Reply With Quote
Old 06-19-2006, 01:42 PM
  #6
Gold Member
Gold Member
 
Join Date: Jan 2004
Location: Houston, Texas
My Boats: 34 Fountain trip 300's
Posts: 491
Default Re: Help possible vapor lock????

We've had boats in south Texas that have run fine for years. Many all of a sudden started having running problems similar to yours. All mechanics are saying it is the new gov't. required ethanol added to the fuel here. You may want to check to see if the ethanol has been added to your fuel. We're still trying to find a solution. If the marinas don't drain their regular fuel tanks prior to adding the ethanol based fuel, it causes all the water from moisture in their tanks to be mixed throughout their fuel and then their water drain systems are useless.
THLWL is offline  
Reply With Quote
Old 06-19-2006, 02:12 PM
  #7
Registered
Thread Starter
 
Join Date: Feb 2001
Location: Norwalk, CT 06850
Posts: 81
Default Re: Help possible vapor lock????

Yeah I emptied it but I was out on the water and just put it back on, it wouldn't start but I know that motor ran fine because the problem switched motors. I have a feeling it is Vapor Lock or bad gas because they did put Ethonal in the new gas, for the price we are all paying for gas you think that the last thing it would do would cause issues with the boat!!!!! I will put new water seperators on and fill them with gas, hopefully this will fix it.
Donzi26ZX is offline  
Reply With Quote
Old 06-19-2006, 02:42 PM
  #8
Registered
 
Join Date: Jul 2004
Location: Palm Harbor, FL
My Boats: Fountain 34CC, Boston Whaler 15 Sport
Posts: 438
Default Re: Help possible vapor lock????

If it was vapor lock, the motor should start and run fine once it had a chance to cool down. It hapened to me about 3 weeks ago and the next day the motor started and ran fine.
Loan Ranger is offline  
Reply With Quote
Old 06-19-2006, 02:46 PM
  #9
Registered
 
txriverrat2001's Avatar
 
Join Date: Jan 2004
Location: Channelview, Texas
My Boats: 1993 Cruisers Inc Twin Diesel, 23' CC 225 Optimax
Posts: 911
Default Re: Help possible vapor lock????

Question - Do you currently have the plastic covers/shrouds/guards around the fuel filter/water separator?

I've seen many boats where the owners or their techs change the fuel filters and never put the covers back on. They are there to keep the fuel in the filter from getting hot causing vapor lock. Many people think they are there to look pretty - but they do serve a purpose.

I've attached a .bmp - #'s 14 and 15 must be in place!!
Attached Thumbnails
Help possible vapor lock????-fuel.bmp  
txriverrat2001 is offline  
Reply With Quote
Old 06-19-2006, 03:13 PM
  #10
Registered
Thread Starter
 
Join Date: Feb 2001
Location: Norwalk, CT 06850
Posts: 81
Default Re: Help possible vapor lock????

Yes the plastic covers are still there, I took them off yesterday only to switch the filter to see if that was the problem. I am assuming that when they both wouldn't start and I let them sit for a little while that is probably why one of the motors started and ran fine. My concern is will this happen again, how do you own a boat that you go away on and have to worry about this happening once again???
Donzi26ZX is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Brandon
General Q & A
5
08-18-2007 07:41 AM
tbenza
General Q & A
4
06-14-2007 04:08 PM
dawiz74
General Q & A
1
04-20-2004 12:09 AM
Pure Energy
General Boating Discussion
10
07-22-2002 12:56 PM
American Dreamer
General Q & A
2
06-03-2002 11:50 PM



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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 02:50 PM.


Copyright 2011 OffShoreOnly. All rights reserved.