4.3L Cobra with electric fuel pump.

av8or09

Cadet
Joined
Mar 4, 2004
Messages
21
Being new to boating, I recently purchased a 1989 Sunbird with a 4.3L OMC Cobra O/D. The motor is brand new and I got the boat at a great price. Well, the more I find needs fixing, that price is looking less and less great!! My current problem is when I checked out the boat I noticed it had an aftermarket automotive electrice fuel pump. I didnt relize what a problem that could be until I read a post concerning engine fires. I decided to replace the pump right away with the proper mechanical pump. Well. to my suprise, the new motor is a fuel injected block meaning the fuel pump port is blocked off and when you remove the plate, low and behold there is no thru hole for the pump shaft. Does not even need the cover plate, just cleans up the block. Since buying another block is out of the question right now at least, I need to know if anyone has any suggestions on an electric pump that can be made safe. I know there has to be a way considering all of the fuel injected boats out there. I have access to all the stainless steel line and fittings I need, so hard plumbing it seems to be my best option. If this can not be done safely than this boat will just have to sit for now. I will not risk my family or friends lives because of the cost of marine parts.
 

denniz

Senior Chief Petty Officer
Joined
Aug 21, 2002
Messages
743
Re: 4.3L Cobra with electric fuel pump.

I do side work for a wholesaler, He does crap like that all the time,I just shake my head and tell him it isnt right. Risking people lives is not worth saving $50.00 on a fuel pump.Better get it checked out. Dennis
 

vinney

Chief Petty Officer
Joined
Oct 29, 2002
Messages
437
Re: 4.3L Cobra with electric fuel pump.

Carter makes marine electric fuel pumps List 110.00 And Holley makes a marine electric fuel pump. It has a blue stripe on it they list for 140.00 Sierra offers the carter electric fuel pumps
 

fireship1

Chief Petty Officer
Joined
Aug 26, 2003
Messages
581
Re: 4.3L Cobra with electric fuel pump.

Hello, If you refit with a marine grade pump and you do it yourself make sure you wire it right. Install an oil pressure switch on the motor. Ground the pump through this switch. This way if any lines ever pop off or break you will stall out, the pump will loose power and not flood the bilge with fuel. Just some good safety advice! Good luck! :)
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,097
Re: 4.3L Cobra with electric fuel pump.

Are you Sure, That's Not the Right Pump there Now ??????<br /><br />With Ele. Pumps, The Only Difference I know of, Is the Way it's Wired............(as per Fireship's post)
 

DHPMARINE

Captain
Joined
Dec 16, 2003
Messages
3,688
Re: 4.3L Cobra with electric fuel pump.

Marine use usually refers to 'spark proof'.I would think most electric fuel pumps meet this requirement.(I hope)I don't think any electric pump would dump fuel into the bilge during a diaphram failure.I also suspect the 'marine pumps' aren't constructed with non-rusting materials.<br />The safety in marine electric fuel pumps comes in the wiring.Voltage when cranking,none when running without oil pressure.<br />DHP
 

av8or09

Cadet
Joined
Mar 4, 2004
Messages
21
Re: 4.3L Cobra with electric fuel pump.

Ask and you shall recieve!! Thanks to all who replied!! Ordered the Carter fuel pump and a oil pressure switch today. Will hard plumb from the pump to the carb, maybe from the tank too with a section of marine grade fuel hose for the last 2 feet for vibration and engine tourque. THANKS AGAIN FOR ALL THE HELP!! I maybe mechanicaly up to speed on cars, but boats are a new beast to me!
 
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