Fuel Line for 4 BBL conversion

[fast94impala]

Have a 96 Maxum with 5.7l Mercruiser and converted it to a 4 BBL this summer. Any one have part# handy for a replacement fuel line that works with an Edelbrock carb? Added rubber hose temporarily.<br /><br />Thanks in advance,<br /><br />Mark

 

[bluewater19]

Re: Fuel Line for 4 BBL conversion

As long as the line is coast gaurd approved you can use rubber.<br />I'm sure mercruiser has the correct hard line for you boat just go to your local marina and tell them you need the hard line for a carter type 4bbl carb.

 

[tommays]

Re: Fuel Line for 4 BBL conversion

CG wants hard lines on the pressure side of the fuel pump and does not want a hose clamps spring force to be the sole means of holding a fuel line<br /><br />in plain english i believe they only want flexable lines that can use a pressed fitting simalar to a hydralic line<br /><br />they write it as conufsing as they can<br /><br />tommays

 

[fast94impala]

Re: Fuel Line for 4 BBL conversion

Really looking for part numbers. Have tried Dealers twice and inevitably it's the wrong line. Is there specific years that the Carter 4bbl was used on the Mercruiser 5.7?<br /><br />Thanks,<br /><br />Mark

 

[rodbolt]

Re: Fuel Line for 4 BBL conversion

in your case use seamless steel tubing and custom bend it. after fitting it remove it and paint it .<br /> good luck and keep posting

 

[Bondo]

Re: Fuel Line for 4 BBL conversion

Of all the motors I've seen,<br />Rochesters were used on the 350s.....<br />Merc./Weber/Carters were used on the 4.3l,+ the 454s......<br /><br />I'd do like rodbolt says,+ use a piece of 3/8s brake line......

 

[Northern Eclipse]

Re: Fuel Line for 4 BBL conversion

I upgraded to the Edelbrock 4bbl this past spring the fuel line part from Merc is #32-805360t its described as '5.7l alpha with weber carb' 1987 -1996 ,along with this you will also need to change the fuel outlet fitting at the pump to an elbow thats also available from merc, part number is #22-43276. I used these parts and everything fit perfect, the fuel line was around $40usd and the elbow was about $5.

 

[Destin]

Re: Fuel Line for 4 BBL conversion

The Coast Guard has a revised document, Nov 2003, that is much improved. It has detailed descriptions and drawings of all parts of approved fuel systems. You can use flexible hose between the fuel pump and carburetor if you use the specified hose, fittings and clamps. They tell you everything you need to know in detail. I personally would feel safer with the crimped on fittings.<br /><br /> http://www.uscgboating.org/regulations/boatbuilder/downloads/fuelsystem.pdf <br /><br />Excellent info on fuel tanks and other components also.

 

[tommays]

Re: Fuel Line for 4 BBL conversion

Destin<br /><br />thanks that is much beter and easery to understand than anything i have read before on the fuel system<br /><br /><br />tommays

 

[mikeneal]

Re: Fuel Line for 4 BBL conversion

I would goto to a local hose suppiler. (we have goodyear industrial around here) or any auto parts that can make power steering or AC hoses and have them crimp the fittings. I also would worry about a total stainless (no flexible portion) stress cracking from fatquie as stainless fatigues pretty quickly. A good idea could go very very wrong if the line cracks.<br />My 2 cents anyhow.<br />Mike

 

[bomar76]

Re: Fuel Line for 4 BBL conversion

Originally posted by Bondo:<br /> Of all the motors I've seen,<br />Rochesters were used on the 350s.....<br />Merc./Weber/Carters were used on the 4.3l,+ the 454s......<br /><br />I'd do like rodbolt says,+ use a piece of 3/8s brake line......

My 94 5.7 came factory with the Weber/Carter AFB carb.<br /><br />Every 5.7 4bbl I have seen of that year had the same carb.

 

[Bondo]

Re: Fuel Line for 4 BBL conversion

Hey.............. I Never said I Know Everything................. <br /><br />Northern Eclipse says they were used on the 87s thru the 96s.......<br />That's Great News to me.... I Love the Merc./Weber/Carter/Edelbrocks.............<br />And, I Hate the Rottenchesters........<br /><br />bomar76, is Marysville up in the northwest corner of your state ??????<br />Is there/ Was there a former Movie Theater, turned Night Club in downtown ????<br />Had a Great Time in there 1 night.......<br />Back in the 80s..........

 

[bomar76]

Re: Fuel Line for 4 BBL conversion

I agree that the old AFB is a far superior carb for marine useage. Square bores make a lot more sense in this application. All around better carb too.<br /><br />Marysville is just a little NW of Columbus.<br /><br />In Lima OH there is an old movie theater downtown that has been a night club for quite a long time.

 

[steve n carol]

Re: Fuel Line for 4 BBL conversion

Question, What is the angle on the stainless steel flare? (at the connection). I know that it is less than alumnium as SS does fatuige. I used to know these things before I forgot...sl