1994 Mercury 200xri dies giving it throttle!

[ajc549ff]

Hey all,

I have a 1994 Mercury 200xri on my Nitro bass boat. Last weekend during a tournament began to run outta gas while heading to weigh in. Boat would die I would start ot back up, floor it and get onto plane for 15-30 seconds then the speed would gradually vome down and not move. So long story short I had to do that like 8 times to get back with 2 minutes to spare Got it on the trailer just fine then went straight to the gas station and put 4.5 gallons. Took it out yesterday and it started just fine, idles just fine, gets into gear just fine at a low no wake speed then when you give it gas to get going the engine just bogs down and sounds like crap not moving us anywhere.

Stopped by a local Merc mechanic and he told me sounded like a fuel issue and to replace the fuel line with the pump ball and the fuel/water seperator. So today I did and just pumped up the ball until it was hard, cranked it over just see it would start before driving to the lake.

After launching it, the engine started just fine, idled just fine. Died once at idle speed but started right back up. Continued to the end no wake and had the same exact thinh happened! Only had it running for 10 minutes. So briught it back home hooked up the muffs and ran it for 25 minutes at idle just fine.

Ideas?

[Kongfish]

Well,
Check these things after you do this. Run the boat by putting your fuel line in a gas can, a 2.5 or 5 gallon can of gas. This will narrow the problem down greatly for you. If the problem stops while using the gas can then you know the problem is somewhere from your gas tank to the location in the line where you separated the fuel line for the test.
If the problem is still there, that will tell you the issue is located somewhere from that point of the fuel line up to your fuel injectors.
First check these things
- Faulty gas cap,
- Fuel Vent tube clogged up.
- Replace the fuel bulb. ( is the fuel bulb staying hard? ) tell tell sign of air leak
- Anti- siphon valve, these are a common thing to have go wrong.
- leak or crack in your gas tank
- check your fuel water separator. Carefully remove it and pour the contents into a clear container, if you have water in your fuel you will see the two different liquids. That will eliminate water in the gas.
- look for tiny little black specks in the fuel, a rotted fuel line may be collapsing under pressure only. You won't see it until it has enough vacuum pull on the line under a Load.
- if the problem is from the fuel line in the alternate gas tank, forward into the engine.
- check for a crack in the fuel pump diaphragm
- check for the black speaks in your fuel filters. Rotted fuel line
- squeeze the fuel lines all through the entire fuel system & motor looking for cracks.
- check for a faulty fuel injector/s by unplugging one at a time.
- check for a possible location in the fuel line that might be getting kinked once under a load.
- possible you have a bad coil or stator but unlikely.
That's everything I can thing of to tell you to check.
A lot of people will knock the ball bearing out of the anti siphon valve because they are so common to get stuck or cause problems in the system. I've even had several faulty brand new anti siphon values, and fuel bulbs to be bad out of the box.
Using the alternate fuel source will give you a solid direction to focus on and cut it down to either the motor, or from the fuel lines back to the fuel system.

[Ski]

Put a fuel pressure gauge on it. I'm guessing you cooked the high pressure fuel pump when you ran it out of fuel.