1995 GT-40 Intermittent no start

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   Let me preface this by saying I am speaking on behalf of my Dad.  I know very little of boat engines but am very comfortable on the internet.  My Dad is the opposite.  So his 1995 GT-40 will occasionally not start.  We hear the fuel system prime when turning the key.  The fuel pumps turn on for about 1 sec.  But the engine will not turn over.  Sometimes turning the key on/off for 3 or 4 times will get the engine started.  But that is not a 100% fix.  Sometimes just can not get it started. Once started the engine runs fine, so he has ruled out dirty fuel or water in the fuel. He had a mechanic by one day, but they could not get it to fail.  The had the diagnostic tool connected and there were no stored error codes or anything like that.

I have spent quite a lot of time on these forums.  Currently my Dad is out getting a couple relays to replace the ECA and fuel pump relays.  We are really just going on a hunch, since they seem to be a common problem and have never been replaced.  Also an in-expensive and easy job.

So I would appreciate any words of wisdom.  We are located in Central Maine, so if anbody knows of a local guru who could diagnose over the phone, that would be great also.  We are having a house full of people of the next 6 days, and would love to put this headache behind us.

Thanks in advance,

Dave  

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Mainer222 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-24-2012 Location: Hartland, ME Status: Offline Points: 7	Post Options Post Reply Quote Mainer222 Report Post Thanks(0) Quote Reply Topic: 1995 GT-40 Intermittent no start Posted: July-24-2012 at 12:15pm
	Let me preface this by saying I am speaking on behalf of my Dad. I know very little of boat engines but am very comfortable on the internet. My Dad is the opposite. So his 1995 GT-40 will occasionally not start. We hear the fuel system prime when turning the key. The fuel pumps turn on for about 1 sec. But the engine will not turn over. Sometimes turning the key on/off for 3 or 4 times will get the engine started. But that is not a 100% fix. Sometimes just can not get it started. Once started the engine runs fine, so he has ruled out dirty fuel or water in the fuel. He had a mechanic by one day, but they could not get it to fail. The had the diagnostic tool connected and there were no stored error codes or anything like that. I have spent quite a lot of time on these forums. Currently my Dad is out getting a couple relays to replace the ECA and fuel pump relays. We are really just going on a hunch, since they seem to be a common problem and have never been replaced. Also an in-expensive and easy job. So I would appreciate any words of wisdom. We are located in Central Maine, so if anbody knows of a local guru who could diagnose over the phone, that would be great also. We are having a house full of people of the next 6 days, and would love to put this headache behind us. Thanks in advance, Dave

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4945	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 12:34pm
	Dave, I put together this thread to document all the fixed GT-40 problems. Basically, not to ask the questions, but to document the resolution. See if anything looks familiar, and be sure to look at the Google Docs spreadsheet that is linked within the thread: http://www.correctcraftfan.com/forum/forum_posts.asp?TID=25584&title=poor-mans-gt40-diagnosis Just want to clarify one thing. Are you talking about an engine where the starter motor is cranking, but the engine doesn't start? Or is the starter not even cranking?

Mainer222 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-24-2012 Location: Hartland, ME Status: Offline Points: 7	Post Options Post Reply Quote Mainer222 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 12:44pm
	Thanks, I have reviewed the poor man's guide. That is how I kind of narrowed in on the relays. It gets confusing, sometimes a thread seems to be related to my problem, but then it takes a turn, and I am headed down another path. To clarify, when this happens the starter motor is cranking, but the engine does not start.

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4945	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 12:50pm
	Have you been able to confirm whether you are getting spark in every instance?

Mainer222 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-24-2012 Location: Hartland, ME Status: Offline Points: 7	Post Options Post Reply Quote Mainer222 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 12:58pm
	Yeah, getting a spark every time. My Dad tested that by spraying ether into the air breather and it will start.

Silver15 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: March-24-2010 Location: Orlando Fl Status: Offline Points: 398	Post Options Post Reply Quote Silver15 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 2:08pm
	Dave, are you saying that when you spray ether in the intake, it will start and continue to run? OR start and run until the ether runs out? Both scenarios would call for different courses of action. Jake
	2000 Air/Sport 1978 T16

Mainer222 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-24-2012 Location: Hartland, ME Status: Offline Points: 7	Post Options Post Reply Quote Mainer222 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 2:52pm
	Jake, one spray of ether with start it, then it will start to die, another spray will keep it running, then it will run on fuel. Thanks, Dave

Mainer222 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-24-2012 Location: Hartland, ME Status: Offline Points: 7	Post Options Post Reply Quote Mainer222 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 2:57pm
	Took a shot and replaced the two relays (fuel and ignition) on the back of the engine. Did not fix the problem. Dave

Mainer222 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-24-2012 Location: Hartland, ME Status: Offline Points: 7	Post Options Post Reply Quote Mainer222 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 3:00pm
	FYI: My Dad is running high octane fuel through, thinking it is a fuel problem. My thoughts are that if it were a fuel problem it would not run that well, but once we get it started she runs perfect. Dave

TRBenj Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-29-2005 Location: NWCT Status: Online Points: 21125	Post Options Post Reply Quote TRBenj Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 3:03pm
	I have heard of the fuel pickup tube in the FCC (which holds the HP pump) can crack and cause issues. Have you opened it up to inspect? My memory could be failing- I dont recall is that was a GT40 or Excal issue (or both).

crobi2 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: April-05-2011 Location: Texas Status: Offline Points: 112	Post Options Post Reply Quote crobi2 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 4:13pm
	Do you have a fuel pressure tester to check fuel pressure at the rail? EDIT: From the symptoms, it does not really sound like a lanyard issue.
	C-Rob 2000 SAN

Silver15 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: March-24-2010 Location: Orlando Fl Status: Offline Points: 398	Post Options Post Reply Quote Silver15 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 4:27pm
	As Rob hinted at, sounds like you've got low fuel pressure. (could be caused from a variety of things) A good thing to do would be to test the fuel pressure when it is doing its "thing". It should be about 40psi. You can test this by hooking up a fuel pressure checker to the shrader valve on the front of the starboard fuel rail. Let us know. Jake
	2000 Air/Sport 1978 T16

Tim D Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-23-2004 Location: United States Status: Offline Points: 2635	Post Options Post Reply Quote Tim D Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 9:06pm
	The first thing I would do is take the drain plug out the bottom of the fuel control cell and drain it to see if water is blocking.
	Tim D

lewy2001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234	Post Options Post Reply Quote lewy2001 Report Post Thanks(0) Quote Reply Posted: July-24-2012 at 9:42pm
	Fuel pressure is the first thing you should check. The ECM does not check for fuel pressure so no codes will be stored. It sure sounds like it is lacking fuel. Jumper the STO (EEC Test Connector) to make pumps run continually will make measuring fuel pressure easier if it will not start. This was mentioned in AMB's thread on fuel supply problems. Have a good read through that thread. It will give you a good understanding of the fuel supply system. Have you opened the FCC canister and checked fuel filter and the high pressure pump connecting hose that Tim mentioned ?
	If you're going through hell, keep going 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta

1995 GT-40 Intermittent no start

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