Twin, fuel pump, regulator, return line ?
05-09-2005, 12:38 PM
#1
Registered
Thread Starter
Join Date: Oct 2002
Location: Cincinnati, Ohio
Posts: 1,477
Likes: 0
Received 0 Likes
on
0 Posts
Twin, fuel pump, regulator, return line ?
Can someone tell me if on a factory twin MPI or EFI setup if there will be two fuel pumps, factory regulators, and return lines? Or does the system run in series with one setup and return line back to the tank? MY question pertains to a 98 Scarab with twin 350 MPI's but I would assume most are configured the same.
Brian
Brian
05-09-2005, 01:18 PM
#2
Registered
Join Date: Nov 2003
Location: Melbourne, FL
Posts: 1,243
Likes: 0
Received 0 Likes
on
0 Posts
Re: Twin, fuel pump, regulator, return line ?
My boat has MarinePower engines with Atizona Speed EFI. Each engine has it's own fuel pumps, filters, regulators and returns lines.
Not all EFI systems have a return line so it's engine.EFI specific regards fuel return line. In fact I think mine is the exception to the rule.
I think it's standard for each engine to have a low and high pressure fuel pump, regulator and filter.
Not all EFI systems have a return line so it's engine.EFI specific regards fuel return line. In fact I think mine is the exception to the rule.
I think it's standard for each engine to have a low and high pressure fuel pump, regulator and filter.
05-09-2005, 02:24 PM
#3
Registered
Re: Twin, fuel pump, regulator, return line ?
Brian,
Assuming you have Mercruisers, you should have the "Cool-Fuel" system. This system only has one fuel pump, one fuel cooler, one pressure regulator and one return line (going back to the fuel water seperator, not the tank) per engine.
Dave
Assuming you have Mercruisers, you should have the "Cool-Fuel" system. This system only has one fuel pump, one fuel cooler, one pressure regulator and one return line (going back to the fuel water seperator, not the tank) per engine.
Dave
05-09-2005, 02:27 PM
#4
Registered
Thread Starter
Join Date: Oct 2002
Location: Cincinnati, Ohio
Posts: 1,477
Likes: 0
Received 0 Likes
on
0 Posts
Re: Twin, fuel pump, regulator, return line ?
This is exactly what I have. what will be differerent with twins? I do have two filter assemblies.
Awesome pic, helps a lot. I have a line drawing from my research today. I am stuck and work and can't get my hands on the boat....
Awesome pic, helps a lot. I have a line drawing from my research today. I am stuck and work and can't get my hands on the boat....
05-09-2005, 02:34 PM
#5
Registered
Thread Starter
Join Date: Oct 2002
Location: Cincinnati, Ohio
Posts: 1,477
Likes: 0
Received 0 Likes
on
0 Posts
Re: Twin, fuel pump, regulator, return line ?
Originally Posted by tssteph
This is exactly what I have. what will be differerent with twins? I do have two filter assemblies.
Awesome pic, helps a lot. I have a line drawing from my research today. I am stuck and work and can't get my hands on the boat....
Awesome pic, helps a lot. I have a line drawing from my research today. I am stuck and work and can't get my hands on the boat....
I think I may have misread your post the first time. Each of the components are per motor right?
05-09-2005, 02:57 PM
#6
Registered
Re: Twin, fuel pump, regulator, return line ?
Yes. Each engine has it's own totally independant fuel system. If you do a search on "Cool-Fuel" you will get some more good information.
Dave
Dave
