Splitting fuel line for twin engines

redthunder · 29 January 2013, 10:14

Just fitting twin engines. I need to get a Twin lift fuel bowl. Where the fuel tank goes in one side then two hoses come out the other side. Any ideas where I get one from?

Nos4r2 · 29 January 2013, 14:26

Why not use separate fuel tanks and two bowls?

Alternatively,you can get another take-off barb for a standard Quicksilver bowl if it'll flow enough fuel. They have the threads in them and a blanking plug yoiu just unscrew,

uncle al · 29 January 2013, 15:09

carefull if you run two engines of one fuel bowl, (it could make the engines run to lean)and cause damage, it would be better with two separate fuel systems as Nos4r2 suggests

jyasaki · 29 January 2013, 15:33

Standard Racor bracket has provisions for dual inlets and outlets. I'd go with a separate filter for each engine (at the least. I would have to think about going to separate tanks; I seem to have enough trouble remembering to monitor level in one.)

jky

redthunder · 29 January 2013, 15:41

I was thinking of taking the fuel hose to the transom form the tank then splitting it with a T connector with each one going into a separate water separator then into the engine. The engines have come with their own water separators. Will that work or do I need something else. Is a bowl a water separator ?

Dirk Diggler · 29 January 2013, 16:29

What size are the motors? (hp)

hamster · 29 January 2013, 16:35

Do as you suggest above. Run a line to the transom and split to the two filters/water separators. Ensure the line is big enough diameter to supply enough fuel to both engines at WOT. Consider putting shut off valves in case you need to isolate an engine for any reason.

The order of parts should run - Tank - filter/separator - primer bulb - engine. Think about how you connect to the filter and engine etc in case you want to run either engine on an auxiliary tank for any reason. This can be done in many different ways to either connect straight to the engine or through the individual filters by using standard fuel line connectors in the desired places rather than hard connecting everything.

redthunder · 29 January 2013, 16:46

Thanks hamster. The motors are 150 merc four strokes

mick · 29 January 2013, 16:55

Mine has 2 lines coming from the sender unit in the console to 2 Racor filters that has 2 inlets so I am having 1 permanent main feed and then 2 quick connectors for auxiliary tanks.

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Dirk Diggler · 29 January 2013, 17:06

Quote:

Originally Posted by mick

Mine has 2 lines coming from the sender unit in the console to 2 Racor filters that has 2 inlets so I am having 1 permanent main feed and then 2 quick connectors for auxiliary tanks.

Unless they're self sealing when unattached your gonna need several fuel taps!

mick · 29 January 2013, 17:12

Quote:

Originally Posted by Dirk Diggler

Unless they're self sealing when unattached your gonna need several fuel taps!

Have wondered about that think I will get two taps to be sure I haven't done it yet but could put a tap on and a quick connector on the tap.

Dirk Diggler · 29 January 2013, 17:19

you'll also need a tap on the line from the tank

mick · 29 January 2013, 17:28

Quote:

Originally Posted by Dirk Diggler

you'll also need a tap on the line from the tank

How come if I have one between the tank and filter

Ribochet · 29 January 2013, 19:20

Quote:

Originally Posted by redthunder

Thanks hamster. The motors are 150 merc four strokes

I would be worried about a single fuel line being able to feed these babies at WOT - should be a great rig BTW

willk · 29 January 2013, 19:37

Mick - this is what you need - 2 x supply lines, 2 x filters, 2 x taps. Oddly, the bulbs were in different locations on either side, but it didn't seem to make any difference...

peterwhite · 29 January 2013, 19:53

Would have to agree with the above. I would not under any circumstances run two engines from a single supply. Must be separate supplies to feed each engine. It is also much safer in the respect that if you get any contamination in a tank then you always have a backup. As uncle al mentioned it could cause fuel starvation problems in the engines and should the engines run lean then you will have no comeback with warranty on any engine. Also remember to pipe the engines correctly I.e. no fuel primer bulbs and use 10mm Id fuel hose all the way. Will be a machine when it's ready though those engines are absolutely incredible. Good luck. Peter

hamster · 29 January 2013, 20:13

Use these if you want to be able to quickly disconnect the main fuel line and connect an auxiliary tank in place.

MERCURY FUEL LINE TANK END CONNECTOR QUICK RELEASE KIT BOAT OUTBOARD | eBay

I've seen a twin engine/twin tank set up use these to enable both engines to run off either tank by having a split pip with two connectors from each tank. Each filter had a brass connector for connecting which ever fuel line you like. Both engines could be connected to the same tank or run off their seperate tanks. Guess you could set up a similar system with various pipes and taps.

mick · 29 January 2013, 20:22

Quote:

Originally Posted by willk

Mick - this is what you need - 2 x supply lines, 2 x filters, 2 x taps. Oddly, the bulbs were in different locations on either side, but it didn't seem to make any difference...

Can't you just have the primer bulb next to the engine

willk · 29 January 2013, 20:26

Quote:

Originally Posted by mick

Can't you just have the primer bulb next to the engine

If you trace them out, you can see they were both ways! I guess with wee 90s on those big hoses, it didn't matter a whole lot?

Chris · 29 January 2013, 20:31

Quote:

Originally Posted by willk

If you trace them out, you can see they were both ways! I guess with wee 90s on those big hoses, it didn't matter a whole lot?

Did you run your engines on 25 litre tanks then, no fitted tank?