Fuel lines & primer bulb

Gramas · 26 March 2014, 09:43

Before I fit new lines and bulbs is it best to have primer bulb nearer engine or the tank?? I have too tanks to rig up.
First being located at transom directly by outboard the 2nd at fwd end of rib in front of console

Gramas · 26 March 2014, 10:08

Forgot to add I also have a water separator mounted on transom so is it good idea to have after or before it?

SteveHall · 26 March 2014, 11:24

Fuel primer nearer to the engine than tank and after the fuel / water seperator

Gramas · 26 March 2014, 11:41

Cheers

Barrowboy · 26 March 2014, 12:05

....make sure you have the arrows on the bulb pointing in the desired direction of flow.

two stroke mick · 26 March 2014, 13:15

On the subject of primer bulbs. I have noticed on the net that there are complaints about certain makes of bulb and experanced problems with a new tempo bulb. where can a man get a good quality primer bulb?

TSM

peterwhite · 26 March 2014, 21:19

Speak to rob (turbodiesel) and get a genuine quicksilver one. Not expensive and very good quality. A bad primer bulb can blow an engine to smithereens from running lean and make sure to use the right size hose and clamps to install.

Gramas · 26 March 2014, 21:40

So for a 90 yam yr 1990 ish is 3/8" fuel hose right?

peterwhite · 27 March 2014, 22:33

Yes that's spot on. The bigger the line the better as it reduces the restriction in the system giving better performance and reduces the possibility of lean running.

Wibs · 27 March 2014, 23:26

Quote:

Originally Posted by SteveHall

Fuel primer nearer to the engine than tank and after the fuel / water seperator

Oh bugger..!

I've just set up a second fuel tank and a water separator. I was advised to fit fuel bulbs(I have two-one per 25ltr fuel tank)before the separator.

I then have a short length(approx 500mm) of 3/8" fuel line from separator to outboard (suzuki DF50).

Does anyone see a problem with this....I'm testing next weekend.

Chris Caton · 28 March 2014, 08:57

Quote:

Originally Posted by Wibs

Oh bugger..!

I've just set up a second fuel tank and a water separator. I was advised to fit fuel bulbs(I have two-one per 25ltr fuel tank)before the separator.

I then have a short length(approx 500mm) of 3/8" fuel line from separator to outboard (suzuki DF50).

Does anyone see a problem with this....I'm testing next weekend.

seems a but complicated, are you using standard removable 25ltr tanks, the sort you can take out to re-fill? thought just a standard fuel line with primer would have been fine, just cut it before the engine to fit the separator, less to go wrong

Wibs · 28 March 2014, 15:44

My rib originally had one 25ltr removable fuel tank located in the console, a primer bulb located to the stern, then the quick release connection into the outboard.

The original tank is a pain in the arse to get to, ok if your moored up in a marina- but horrible to re fill out in the sea.!!

So I decided to install another 25ltr removable fuel tank to the stern. This also comes with its own primer bulb.

I also installed a water separator, fixed on the transom. The inlet side of the separator has a quick release connector. That way, I can swop fuel tank hose's quickly. Both fuel lines have their own primer and quick release connector.!

The outlet side of the water separator just has a short length of 3/8" hose(400mm) going to the outboard.

This is how I was advised to do it.....

Do you think ANOTHER bulb is required from separator to outboard.?

This would make 3 in total.!! Don't want too many parts if not needed..!

Thanks for any info

Wibs · 28 March 2014, 15:46

.....good god.

I've just read that back to myself, and even I'm confused now.!!

Chris Caton · 28 March 2014, 16:38

yes, makes perfect sense to me, must be coz I'm a bit thick only being a spark n all

anyway, yes, I see what you're getting at now, I think you may have been better off with just the one primer bulb between the separator and the engine, so you would suck the fuel through the separator rather than pushing it through, but in reality don't suppose it makes that much difference. I guess if you've got quick release fittings on both ends of each line it gives you the chance to swap lines if you have a problem when out on the water.

Wibs · 28 March 2014, 17:01

I suppose it wasn't clear that I have two independent fuel lines connected to separate fuel tanks.

I like this, as it means I can monitor my fuel.

I've had it tested on muffs, seems to work fine, I just didn't want any type of fuel starvation at WOT.

Not that it matters too much with my fuel injected 4st, it'll just run rough, rather than overheat from running too lean on the older 2st's..?

Thanks Chris

Chris Caton · 28 March 2014, 17:15

let's know how you get on