Vacuum line for Suzuki 2.5HP 4 stroke outboard

[Mc Tool]

Either cut the old jet out and re-use or get just about anything the right dia (like a piece cut out of a brass bolt ) and drill a hole in it about the same size . I used a roll your own cigarette butt stuffed into the hose to dampen pulses on my fuel injected Ducati ...been there for years . Or if you have money to spare go buy a fuel metering jet off something .

 

[99yam40]

From what I am seeing the hose is still available. The jet from Suzuki, apparently not.

But if really needed I suspect www.jetsrus.com could come up with one if needed.

I guess I was correct in the #11 hose/line being the pulse line to the pump.
strange that the OP does not understand what he is seeing

 

[Mc Tool]

If you look at the photo I included,you will see the bottom part of the lighter grey hose is attached at the back of the carb.... I'm sorry, I don't know what it's called, but that's the one that needs replacing.

What your refering to as the back of the carb is actually the intake port and thats where the pump gets its pulse from ....as the intake stroke happens there is a vacuum pulse as the piston descends sucking air in ....this vacuum sucking/ pulse is transferred along the light gray hose in question to the pump diaphragm . I think that the reason that brass orifice is there is to dampen the pulse a bit because the gray hose is quite short.....for example compared to the same hose on my quads which is over a foot long and as such is self dampening . Heaps of small and some large 4 stroke motors that have to lift fuel ( not gravity fed like a motor bike with the tank higher than the carb ) have a vacuum operated fuel pump . While Suzuki have gone to some length to make this harder than it need be any hunk of ( uscg approved )hose with some similar sized restriction will do the trick .