93' OMC Cobra Spudder Part 2

[Danno5.0]

Okay - new season - new thread.
Here's the original thread for reference: http://forums.iboats.com/showthread.php?t=321059&page=4

Picking up where I left off.....

I replaced the PIP inside the distributor hoping that it would be the culprit...
But - It wasn't - Well, not yet anyway because now the engine just dies when I try to increase the throttle any amount past idle.

Note: I took the distributor into my local NAPA store, they ordered and installed the PIP for me. The part was $40.00 and it was ~ $15 in labor because the gear and the collar had to be removed, and the shaft had to be pulled out to replace the part.

Now, I'm back to square one to see why it won't do anything beyond idle.
Gonna check for any new codes....
Do a static ohms test on the new part (compared to the original)
Try to advance the timing a bit more to see if it needs to be more than the 5 degrees suggested int he manual.

Other than that - I'm scratching my head and asking more questions....

Will report back after I get a chance to get back into it...

Dan

 

[Danno5.0]

Re: 93' OMC Cobra Spudder Part 2

Well, after too many days trying to get it timed in, I decided to have the NAPA store put the original PIP back in. Put her back together, and the timing dropped right in and I was back to where I was w/ the rev limit problem.

Put it in the water to see how it would run, thinking I could at least putt - putt around. Sure enough, I can run it up to about 20mph if I take off slow, but still back to my original problem....

Anyone want to buy a boat?

I did some browsing around for blue book values on these and looks like mine in good running condish is worth maybe $4,500 ??.
I don't want to sink another grand in it by taking it to the dealer and letting them fumble around.....

I did run across a guy in my neighborhood that has been making a living for 25years fixing boats. Ran my story by him w/ all that I have tried, and he was stumped. He called around to a few guys that do work for him and they were acutally trying to trouble shoot another boat like mine w/ the same problem, so far they haven't found it yet either.......

Oh well - life goes on......

 

[HT32BSX115]

Re: 93' OMC Cobra Spudder Part 2

Howdy,


Sorry about your problems......It's a common "thread" with OMC engines that were produced during the "end-times" for OMC. Now that there's no easy fix (or parts) for Spitfire ignition systems or OMC EFI,

If I had your boat, I would remove all things EFI/Spitfire and replace with an MSD (or similar) marine ignition system and a carburetor.

In fact, I would pull the 5.0L engine completely and replace with a 5.7 truck engine and carb. You can probably part out the EFI and ignition "stuff" to other lost souls that continue to hang on to their OMC EFI boats!

I had an OMC 460 King Cobra that I removed from my boat and the first thing I sold was the points type distributor to a local guy with a Spitfire (electronic ignition) 460. He couldn't buy any parts for it and just ripped it all out to install the distributor to get it back on the water!

I went one step further and ripped ALL the OMC "stuff" out!



Regards,






Rick

 

[Danno5.0]

Re: 93' OMC Cobra Spudder Part 2

Rick,

Thanks for the comment....But I don't have the time, tools, or expertise in changing out the motor. I did consider an MSD system, I checked w/ a few suppliers and they reccomend a Mallory Marine system, but neither had a marine contoller. Not sure if that really matters, but that kinda took the wind out of my sails......

Dan

 

[HT32BSX115]

Re: 93' OMC Cobra Spudder Part 2

I know what you mean. If you could find someone to help, should be able to replace the manifold, (with one for a carb) and put any good marine distributor on it to get yourself on the water.

I think you could also probably sell all the EFI & ign parts on Ebay etc.....

Sorry I don't have a better suggestion. Without certain N/A parts you're sort of "dead in the water".

Your best bet is probably an aftermarket dist and any good marine carb. It might not perform as well as it did with EFI and the original ignition, but it will get the boat back running again.

 

[rsemprum]

Re: 93' OMC Cobra Spudder Part 2

after all the reading and performing similar procedures and replacing several parts

still have the same problem, not getting past 8 mph/ 2000rpm no plane

only in neutral "it does red line" if you wanted to...

I still refuse to take it to the dealer, specially after all this hard work... I know some day it will pay off...

 

[Blk-n-Blu]

Re: 93' OMC Cobra Spudder Part 2

Looks like your chasing a gremlin, might want to go back to basics. This from Dons Adults Only Stickey:http://forums.iboats.com/showthread.php?t=295070

 

[Blk-n-Blu]

Re: 93' OMC Cobra Spudder Part 2

I also remembered this link, especially under the "My Own Cobra Experience" paragraph the link to "hints" and the ESA. Maybe it will help:
http://www.hastings.org/~stuart/cobra/

 

[NateL]

Re: 93' OMC Cobra Spudder Part 2

Didn't see all your original problems and what you have tried so far but I had a similar problem and I think the original fuel tank is screwed. Ran a jerry can and boat seem to run fine. Got a new tank on the way and praying that it is my fix. 89 2.3 liter OMC cobra. Like a said dont know what you've tried so it's just a thought.

 

[NateL]

Re: 93' OMC Cobra Spudder Part 2

I went back and looked at your first post guess the tank thing is out. Sorry thought i could lead ya to some help. Keep trying though and good luck.

 

[Blk-n-Blu]

Re: 93' OMC Cobra Spudder Part 2

Look at the "Hastings LinK" the ESA can cause the problems you describe.
Sometimes the obvious is overlooked!!!

 

[Danno5.0]

Re: 93' OMC Cobra Spudder Part 2

I finnaly found the problem.
It was the water temp switch.
Its in tha same circuit as the Oil Pressure Switch. If either are bad it puts the boat in the SLOW mode limiting the RPM to 2800.

You can test it by disconnecting the sensor which keeps the circuit open and at 9 volts.
Once the Overtemp or lack of oil pressure occurs, the switch takes the line to ground, and the ECC enters the SLOW mode limiting the RPM to 2800.

The design seems opposite to me because you can run w/ either wire unplugged and the ECC will think all is okay.
I was told by 2 local boat stores that they don't make the part anymore. But, I found one at another store....

Also, there are automotive replacements but, they may not have the same temp rating.
I saw other temp switches online that have a 200 deg. trip point.


See:
http://www.boatpartstore.com/page32.asp
http://www.marineengine.com/newparts/part_search.php?part_num=OMC3854711&my_part_number=Y

Dan

 

[joemamma]

Re: 93' OMC Cobra Spudder Part 2

I would isolate the wire and watch your gauge and enjoy the summer

 

[Danno5.0]

Re: 93' OMC Cobra Spudder Part 2

Yeah, I thought about that, but I have teenagers that will be using the boat and they will be paying more attention to their girly friends......
In that case, they will be the only ones over heating and not my boat.

 

[sw33ttooth]

Re: 93' OMC Cobra Spudder Part 2

glad you got it fixd

 

[bouros]

Re: 93' OMC Cobra Spudder Part 2

glad you got it fixd

I have the same problem. I did change both sensors(oil & water) with no lack. Should I unplug both of them?

 

[shaps1001]

Re: 93' OMC Cobra Spudder Part 2

It's funny you got it fixed. I was lurking in your other threads for years because I thought I had the same problem. I just solved mine the other day after a few seasons of lousy performance. It turned out to be flappers blocking the exhaust bellows.

 

[HT32BSX115]

Re: 93' OMC Cobra Spudder Part 2

I finnaly found the problem.
It was the water temp switch.
Its in tha same circuit as the Oil Pressure Switch. If either are bad it puts the boat in the SLOW mode limiting the RPM to 2800.

Great! Enjoy the Summer!

Make sure you winterize properly for next year and when Spring comes around, SELL IT!!

Cheers,


Rick