Fuel Injection?

Away Point

Away Point

Member
Apr 24, 2009
292
Lake St. Clair, MI
Boat Info
330 Sundancer
Engines
Big, Gas Lovin', American V-8's :-)
1997 330 SunDancer

Boat for sale, currently in winter storage.

Seller is sure it has fuel injection. However, in the photo, sure looks like carbs to me.

What's your opinion? Fuel injection or Carburetor?

Thanks!!!
75610622_1020654924954577_8852932993065418752_n.jpg
 
I think 1998 is when the fuel injected 7.4s started going into the 330's. I see what looks like linkage, a choke and a fuel pump failure line that leads me to say that's a carburetor. That all said, nothing wrong with a carbureted 7.4, lots of them run just fine - simple to work on.
 
Get him to send you the engine serial numbers and you can look them up on the Mercruiser website.

It is either a carb or TBI (Throttle Body Injection). TBI basically uses two fuel injectors mounted inside a carb body to provide the fuel. A lot of retro kits are using TBI again (Holley, FAST and a few others). Looking closely at the pictures.....my money is that it is a TBI system.
 
if you could get a pic under the cover , that would reveal the answer either way
 
IMG_4230.JPG
IMG_5005.JPG
This is what fuel injection looks like on a 7.4 Merc.
 
Are you buying another 330? One isn't enough - you need a backup? :)

Serial numbers... or a picture without the plastic cover off.

Just looking at the specs on SR's website, in sterndrive form the 330DA for that year could have been carb'd, EFI injection or MPI injection. But in V-drive configuration (which this one obviously is), only a carb'd or MPI. It's obviously not an MPI, so that leaves a carb'd as the only option. *

* Of course, the spec sheets from Sea Ray aren't always 100% accurate and there are sometimes mid-model year changes.

It's hard to see completely on my phone, but it does look like a carb setup.
 
Espos4 said:
I only see two.
Looks like they loop around and pass over near the top of the choke housing.
Click to expand...

I guess we will see if the OP shows back up. Just seems a bit strange that an owner would confuse carbs with fuel injection. Even some of the worst owners I have met knew what they had because at one point they had someone work on their engines who could tell the difference.
 
Thanks guys!!!!

Knew I could find some good experienced opinions here.

What looks like an electric choke coil, the single nut on top which makes you expect a round flame arrester below, and a lack of wires and relays, all said carburetor to my untrained eyes.

And no, lol, not buying a second 330. A buddy is looking and ask me, so I turned to you all here.

Cheers!
 
+1 above. Here's what 97 MPI 7.4's look like as well. I wonder if they would have offered throttle body and MPI in the same model year?

49127196286_53cca910a4_c.jpg
 
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