Mercruiser MPI ?

Islandtrader · #1 01-22-2009, 06:04 PM

I am thinking of putting one in the 21.

The question I have is do these MPI need a fuel pump in the gas tank, like some 4 stroke outboards or do they have a electric fuel pump some place on the engine.

Anybody out there running one of these?

Dilligaf · #2 01-22-2009, 08:03 PM

i dont believe mine has one at fuel tank i have the 350mpi

Islandtrader · #3 01-23-2009, 08:55 AM

Thanks, I just did not want to button up the floor and then go OH POOP

1bayouboy · #4 01-23-2009, 01:20 PM

My Mercury 350MAG MPI Horizon has what is called a "Cool Fuel" module....it's an aluminum housing the fuel line goes into that has a filter and the fuel pump inside. There's a T in the raw water line between the seawater pump and the heat exchanger and seawater is pumped through the module to "cool" the fuel (and maybe the pump too). Before I put the MP engine in I had a carbed engine and it just had a standalone electric fuel pump. So all you should need is the spply line from the tank pickup.......

Gary Hill · #5 01-23-2009, 05:17 PM

yOUR BOAT WILL NOW REQUIRE A RETURN LINE TO THE GAS TANK, SOMEBODY MAKES ONE TO GO IN LINE WITH THE FILL HOSE. THAT WAS ONE OF THE REASON'S I WENT WITH THE CARB. MOTOTOR AND I CAN TROUBLESHOOT IT.

scrapper · #6 01-23-2009, 09:11 PM

Quote:

yOUR BOAT WILL NOW REQUIRE A RETURN LINE TO THE GAS TANK, SOMEBODY MAKES ONE TO GO IN LINE WITH THE FILL HOSE. THAT WAS ONE OF THE REASON'S I WENT WITH THE CARB. MOTOTOR AND I CAN TROUBLESHOOT IT.

this is wrong,there's no return line for fuel.

Islandtrader · #7 01-24-2009, 11:25 AM

Quote:

Before I put the MP engine in I had a carbed

How do you like the new MPI? Do you have the smart panel (gauges).

gofastsandman · #8 01-24-2009, 02:18 PM

Hey Terry,
There`s an `05 6.0L Crusader mpi on THT page 2 w/ 35 hrs. No price. Ad just says "steal it from me". Let me know if you need an ankle bracelet. It`s in Hudson , Fl.
GFS

Islandtrader · #9 01-24-2009, 04:52 PM

Thanks, I sent him a email

1bayouboy · #10 01-25-2009, 03:18 PM

I have the Smartcraft Speedo and Tach with the link guages.....there's a single CAN connector on the engine and cable up to the helm that connects to a hub that the speedo and tach also connect to.....the volt, oil pressure and temp gauges all daisy chain off the tach or speedo (can't recall which at the moment). I also have a separate system monitor that has all the functions of the tach that I can also connect to the hub and use as a multifunction gauge. I started out with just the monitor and the info was so good I fianlly swung for all the guages. Each guage (speedo, tach and monitor) keeps their own stats about fuel usage....so if you're careful about when you reset the guages, you can reset one on fill up and reset the other after each trip and that way you keep up with total used and total used per trip. The fuel use numbers are amazingly accurate, as are all the engine stat numbers you get. If you hook it up to a NMEA 0183 GPS and use a smartcraft fuel sending unit you can get range info and fuel efficiency numbers as well. You have to get an add on pitot tube kit to get water speed with the speedo...basically a small sensor that connects to the engine harness and pitot tube from the outdrive. The horizon package requires a seacock for enough cooling water, bt the FWC is pretty efficient as my engine temp is 159 degrees most of the time....rnning on a hose it will go to 161. It's very efficient as I get around 2.7mpg at cruise on a 4600lb dry weight hull. In 6 tripes offshore where it's a 60 mile one way run to the ledge, it's used 80-70-80 gals with 7-9 hours or trolling.