You can get efi without return lines but you may want to replace your tanks 
anyway.

Sent from my iPad

On Dec 8, 2010, at 6:30 AM, John Strong <[email protected]> wrote:

> Crusader is a marine engine company that uses GM cores.  Marine Power and 
> Mercruiser use GM too.  I'm assuming you have Velvet Drive transmissions - 
> they're simple and tough, and usually worth keeping.  I've got a Salty Dog 
> with carbureted 350's and they will push the boat at 22 knots at around 3000. 
>  Don't know the fuel burn.  Don't want to know!  
> 
> The new engines will come with new cooling systems, so be sure you get them 
> with fresh-water-cooled exhaust manifolds.  The only raw water will be in the 
> heat exchangers and the exhaust elbows.  You'll never need to replace the 
> manifolds.  Bigger cooling systems may mean bigger thru-hulls, seacocks, 
> strainers, etc.  Replace all the metal in the exhaust system with fiberglass, 
> and replace all the hose too.
> 
> EFI will mean modifying the fuel tanks with return line fittings.  It may be 
> time for new fuel tanks anyway.  You can get new tanks from Uniflite's 
> original tank maker, Coastline Mfg. - they still have all the drawings.  As a 
> portion of a repower, not all that expensive.
> 
> http://coastline-tanks.com/
> http://www.mercurymarine.com/engines/inboards/
> http://www.marinepowerusa.com/replacement.php
> 
> Your Sport Sedan is *absolutely* worth repowering. What a great boat!  
> Replacing it with something new of equivalent quality would probably cost 
> $200K.  You can do the repower for a tenth of that.  Go for it!
> 
> John Strong
> [email protected]
> 
> 
> On Wed, Dec 8, 2010 at 4:04 AM, Suzy-Q <[email protected]> wrote:
> Thanx Kenny,
> 
> The quote was for new carburated 350's.  I don't know if they were
> "Crusaders" or not.  Is the "Cursader" an upgraded 350?
> 
> 
> 
> On Dec 6, 11:28 pm, Keith Washburn <[email protected]> wrote:
> > That's not a bad price if your talking about the crusader efi 350s I 
> > repowered  my 32ss with the  Crusader 8.1 efi  I had 454s the efis are way 
> > more efficient and trouble free. My old engines gave me 13 to 15 knots sob 
> > at about 28 gph the new engines give me about 20 to 22 knots at the same 
> > fuel burn .
> >
> > Sent from my iPad
> >
> > On Dec 5, 2010, at 10:01 AM, Suzy-Q <[email protected]> wrote:
> >
> >
> >
> > > I have a 28' Sports Sedan with twin 318's.  Engines were most likely
> > > overhauled in mid-90's.  The boat sat for many years, ran rough for a
> > > while and it was not until late this summer that I got the engines
> > > working well and could cruise at 2800-3000 rpm. (19 - 22 mph speedver
> > > land at that rpm).  After a few hours of cruising the starboard engine
> > > started smoking when I returned from a fishing trip.  The compression
> > > was 120psi+ for all cylinders except #4 which was low at 60 psi.  I
> > > pulled the heads and found that the head gasket had failed.  No water
> > > in the oil just oil in cylinder #4.
> >
> > > I was planning on replacing the exhaust manifolds/elbows and risers on
> > > both engines this winter which is not going to be cheap.  Now I'm
> > > faced with the decision to repair/replace the stbd engine as well.  My
> > > mechanic recommends repowering with new 350's and reusing the
> > > transmissions (approx $22k).  To install a rebuilt 318 would cost $8k -
> > > $9k, including exhaust parts.
> >
> > > Anyone with experience in this area?  Will the 350's be more
> > > economical, provide more speed or be easier to maintain over the life
> > > of the boat.  I'm trying to talk myself into spending the money to
> > > repower the boat and enjoy expensive but some hassle free fishing.
> >
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