new fuel line installation

[TimB]

Hi all, just ordered and received new fuel hose and primer bulb for my 4.8M Ribcraft.
I have from 25 litre tank via primer bulb, to transom mounted fuel filter then from fuel filter to Mariner 60 HP efi engine.

I assume i wont need to worry about the pressure in the old fuel line, just disconnect old hoses and fit the new ones, if that makes sense

[paulbrown22]

Yes, should be a simple case of disconnect from the fuel filter, raise that end up to let any fuel in the old hose drain back into the tank, disconnect from tank, connect up the new pipe, prime your new bulb, and go boating!

The fuel system isn't high pressure, and the fuel pump is in the engine sucking the fuel up, so there won't be a sudden fountain of fuel going everywhere once you disconnect.

[TimB]

Thanks, also can i use or SHOULD i use a bit of ptfe tape on the threads before sliding the new fuel lines on.

[Jeff]

I wouldn't use ptfe tape ,, most outboard manufacturers specify that in their blurb. Small bits of the tape can come off & block injectors, carbs etc ,,, allegedly
I think most fuel fittings are taper thread so ok without anything but for belt & braces this is good stuff

https://www.google.com/amp/s/www.hyt...l.html%3famp=1

Originally Posted by TimB

Thanks, also can i use or SHOULD i use a bit of ptfe tape on the threads before sliding the new fuel lines on.

[TimB]

Thanks all, didnt use anything in the end as all connections were barbed/pushfit, and to be honest were so tight fitting, i am happy with what i have done.