Thank you wyo H1 CAT. you told me more in a few lines than the mechanic told me in the 10 minutes i spent with him. he also called me later telling me he needed to change the fuel pump and possibly fuel injection. he said my cost is approx 500 for the arctic cat. once i get the machine back i will follow your instructions. thank you very much i appreciate it. by the way, we r a small roofing company with a shop in a marina where everyone involved there is associated with boats.we can see now that its obvious that its time for us to move.
Whoops initially read as a 500 not the EFI 550 so no carb bowl to worry about. As for the fuel pump, this one may work on the 550 also. (see below) It does on the 700H1 and the Tcats from what I understand. You'd have to visually compare to know for sure, and would be easy to change out yourself too. I haven't done this myself so may have to replace the old fuel pump on the pick up tube/sender assembly with the new pump. (Guessing here) several months ago, someone reported here that they was able to cross reference the ford pump to the cat pump and replace with success. I saved the model and part number in case I'm ever in need of a new pump. You would remove rear rack, rear plastic and pull the 3 screws that hold the pick up tube/sender and pump assembly in place in the gas tank, may have to change or swap wire ends too. For flushing or cleaning the fuel tank you're going to have the rear plastic off and fuel pump assembly out anyhow.
You could test the present fuel pump for pressure, as long as it puts out around 42 lbs +/- a little of pressure and good volume, I wouldn't think it would need to be changed at all.
Electric Fuel Pump EFI models
fuel pump from a 1990 Ford Mustang 4cyl.
This is Auto Zone part #E2061
retails for around $90 bucks.
the same inlet, outlet, diameter, and height
I'd also change the fuel injector yourself also, pretty much just plugs in. One screw holds the injector in place into the intake manifold with an O-ring seal then a wiring connector to plug in. 10 minute job if you can get to the injector and wiring connector without removing front plastic.
I didn't look up the cost for the injector but for a few hours of your time and probably under $200 you could change those two items and save $300 or so if you do in fact have to replace them items. If you are already committed to the mechanic to repair it, maybe you can have him pick up the Ford pump instead of the EXPENSIVE cat pump