How does the Force/Merc Sport Jet 90 fuel system hook up and how does it work

Redbarron%%

Chief Petty Officer
Joined
Dec 7, 2017
Messages
479
I have a sport jet 90 that has a few problems and I wanted to verify how the fuel recirc system works and how it hooks up.
My question is about the top cylinder to the manifold.
The picture shows the bottom two going to the the corresponding cylinders while the top one shows going to a fitting on the front of the engine.
Is this right?
I wonder if the top two hoses might be swapped since the other two cylinders are plumbed differently?
3b-fuel-system-and-carburation-8-728.jpg
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
17,923
Why change it?
The setup from the factory should be the best?

One thing you should do is check/clean the hoses and one way valves.
​They set and get clogged over time.
​Replace the hoses if they are soft or falling apart.
 

Redbarron%%

Chief Petty Officer
Joined
Dec 7, 2017
Messages
479
I just wanted to make sure it was correct since the connections for the #1 cylinder is different from #s 2 and3
 
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