PO used auto pump, where does OEM pump go?

[munsonbw]

Boat: 1994 Caravelle with a carbed 4.3

I went to winterize the boat after it was sitting for a few months without running and the fuel pump was not working. I removed it and hooked up 12V with no signs of life. In researching for the replacement I discover that the pump is one of these generic autoparts store pumps (E8012S) and not the Mercruiser that should be on it. After lots of research here I have decided I don't mind spending the money for the piece of mind knowing I have a marine rated pump. It appears I have two options: 1. replace it with a generic marine pump from ebay. It is cheaper and looks like it will fit the old bracket and fuel plumbing that is now on my boat. This reduces the PITA factor. 2. Get the OEM pump and replumb to suit. The big problem is after a google search, I can't find where this thing went and how it was plumbed, or the bracket used to hold it. Can anyone help me out here? I am leaning towards the OEM pump because I just have a bit of doubt that the "marine" pumps on ebay that look like the generic pump I have are really marine. There is no end to the deceit that goes on there, and in the end $50 is not that much cash.

Thanks,
Ben

 

[ErieRon]

Re: PO used auto pump, where does OEM pump go?

Ben, best to paste your engine's serial number for a quality answer. Or, go right here at iboats and search it out yourself. OEM is good, but Sierra is decent/same quality.

 

[munsonbw]

Re: PO used auto pump, where does OEM pump go?

Unfortunately the boat is over an hour away, so the serial number is a no go. If it helps, it is a 1994 4.3L with a Gen II drive, 2 barrel carb.

Is there any reason to believe that this is not a marine pump:
http://cgi.ebay.com/ebaymotors/ws/e...0&_trksid=m39&_nkw=310177566255&_fvi=1&_rdc=1 item#310177566255

The pressure might be a little low, but it *looks* like what was on the boat and would be the easiest to install. By the way, no connector for the merc pump either.

Thanks,
Ben

 

[ErieRon]

Re: PO used auto pump, where does OEM pump go?

Unfortunately the boat is over an hour away, so the serial number is a no go. If it helps, it is a 1994 4.3L with a Gen II drive, 2 barrel carb.


Thanks,
Ben

Ben, I don't know about the EBay pump...looks cheesy to me, but that's just me. I'm not big on substituting from OEM on things that could blow up my boat.

I looked up your pump, with the info you posted (no serial numbers) and found the original OEM P.N. - 805656A2, superceded by P.N. 86115A6. It crosses to a Sierra (quality brand) P.N. 18-7326. Problem is, the Sierra description does not match your year.

Take a look here for OEM and compare:

http://www.mercruiserparts.com/Show...=1599&bnbr=60&bdesc=FUEL+PUMP+AND+FUEL+FILTER

The Sierra is available right here at iboats. Again, I would go OEM or Sierra, and wait until you have your serial number in hand...just my opinion.

Good luck.

 

[sdoomaha]

Re: PO used auto pump, where does OEM pump go?

Disclaimer - I have a 1994 Caravelle with 4.3 2 barrel, assuming they are the same.....

To see how the original was mounted and plumbed, go to the "adults sticky" at the top of this forum and download the manual. Electric fuel pump removal and install is noted in Fuel Systems 5B-5. It has very good pictures and instructions. The bracket the pump fits into actually bolts to the engine block right near the water separater. One fuel line from the separater to the bottom of the pump, one from the top of the pump to the carb. While not difficult to replace, the price of the OEM pump was over $200.00 when locally purchased. FYI, OEM does come with the mounting bracket, so if you need one to return the pump to it's proper location, it is supplied. Not knowing where your current pump is located, no idea if replacemet fuel lines will be required.

When it comes to fuel delivery and the possibility of leaks....I feel most comfortable with OEM....

Good Luck whichever was you decide to go.....

 

[Bondo]

Re: PO used auto pump, where does OEM pump go?

The pressure might be a little low

Nope,... That's about Right for a Carbed motor....


There's Nothing wrong with the fuel pump you have now,...
But,..
If you insist on blowing the $300. or so it'll take to bring it back to Merc spec.s,...
Go ahead,...
You'll probably need the original steel fuel lines from the filter to the pump,+ from the pump to the carb too...

 

[munsonbw]

Re: PO used auto pump, where does OEM pump go?

Bond-O,

Since the pump I have now doesn't pump, it isn't so good But, I see your point.

The pumps I have seen that are OEM replacements are $130, without brackets and the hardlines that are missing. I can bend fuel line, so that is not a big deal, plus I am not afraid to use small sections of marine fuel tube either. But, the big question still remains: Is there a generic marine pump that will work? How does one ensure that it is certified, as I understand not all parts carry the SAE stamp. I would prefer to use the same basic style as what I have because I am not well suited for fabrication work at my lake house and I haven't had a tow vehicle in 3 years+. I am not die hard loyal to merc parts... quite the opposite as they are not cheap. I am sure the Holley/Carter/etc pump is a better pump for the money, but it offers no real advantage over the merc. They both will require modifications to the existing setup.

Thanks again,
ben

 

[Bondo]

Re: PO used auto pump, where does OEM pump go?

How does one ensure that it is certified, as I understand not all parts carry the SAE stamp.

Ayuh,....I guess it depends on how anal you want to be about a paper trail or numbered sticker....
Carter makes an electric fuelpump that Looks exactly like the ebay link,..
Maybe that 1 Is a Carter,... I donno....
With electric fuel pumps,+ Marine applications,..
How it's wired, rather than the pump itself is the Issue...
It needs fail-safe shut-offs...

 

[munsonbw]

Re: PO used auto pump, where does OEM pump go?

In the brief things I have read here, the concern was that the marine pumps are "spark proof". How this is I cannot say, but I do know that is what people were stating as reasoning. Alternators I buy, fuel pumps I have to just accept that it is fact. My pump is wired exactly like the factory pump: it will not work unless the engine is running or cranking. So, I have that aspect of the safety covered. Now the issue becomes making at least a half-hearted effort to buy a marine grade. I will search out that Carter pump, that sounds like the ticket.

Thanks,
Ben

 

[Bondo]

Re: PO used auto pump, where does OEM pump go?

In the brief things I have read here, the concern was that the marine pumps are "spark proof". How this is I cannot say, but I do know that is what people were stating as reasoning. Alternators I buy, fuel pumps I have to just accept that it is fact.

Ayuh,... Don't believe everything you read on the internet,....
I've never seen an unsealed electric fuelpump...

'ell,.. Automotive electric fuelpumps are now mounted Inside the fuel tank....

 

[zbnutcase]

Re: PO used auto pump, where does OEM pump go?

I too, have never seen an unsealed electric pump, probably because any dirt/water etc, would make them very unreliable. 'nutcase

 

[munsonbw]

Re: PO used auto pump, where does OEM pump go?

I suppose the design of the Merc pump might be less likely to leak at the crimp? Anyone know how a marine electric fuel pump is different? Maybe this another thread...

 

[Bondo]

Re: PO used auto pump, where does OEM pump go?

Anyone know how a marine electric fuel pump is different? Maybe this another thread...

Ayuh,... If you're that concerned about it,...
I believe in the Restoration Forum there's the Coast Gaurd Regs listed in a sticky at the top...
If you can't find it there,... Google it up....

I don't see another thread about it, that's pretty much the title of This 1....
"Re: PO used auto pump, where does OEM pump go?"

 

[munsonbw]

Re: PO used auto pump, where does OEM pump go?

OK gang, after much digging and time wasting (good thing time isn't always literally money) I have found my answer. The pump used on my boat to replace the Merc pump was in fact not rated for marine use. However, there is a similar pump the Airtex E8337 pump that is marine rated per this document:
http://www.airtexproducts.com/TSB/TSB-0108-01_ATX.pdf

It is rated exactly the same as the E8012S, except this one is stated as marine. The good part is that it is available at AdvanceAuto for $52.

Problem solved!

Thanks for all the advice gang.