200 Ocean Runner Fuel Pump

[jeremyeasen]

This has been an ongoing saga, but its narrowed down so I thought I'd start a new topic. I found quite a bit of crud in my newer fuel/water separator filter so I changed filters. After nearly 3 hours of solid running at 4500 to 5000 I thought she was fixed. Then the alarm started chirping...fuel restriction. We made it home and I checked the filter. It was clean fuel, no crud. Next I will take a spare tank and bypass the filter to check this out, but before I do I'd like to know if its possible for these fuel pumps to "get tired" after long stretches of running. Everything else is great. FYI, no VRO and its not an overheat. Motor is 1994, with original pump. thank you all. By the way I've found that this restriction sensor has been very effective. It goes off about 5 minutes before the motor shows the effects of running out of fuel.

 

[JB]

Re: 200 Ocean Runner Fuel Pump

I suppose it is possible, Montauk, but I think it is very unlikely.<br /><br />I think it is more likely that there is debris in the tank restricting the outlet, intermittent vent restriction, bad anti-siphon valve or intermittent air leak in the lines.<br /><br />If the trouble happens to coincide with a certain level in the tank you may have a pickup tube crack that starts sucking air when the fuel level drops below it.<br /><br />All of those possibilities should be bypassed with a portable tank and fresh lines.<br /><br />Good luck, and let us know what you find.

 

[jeremyeasen]

Re: 200 Ocean Runner Fuel Pump

Here's the latest...checked venting and its fine, anti-siphon valve was removed awhile back, and I found a loose clamp from tank outlet. That leaves debris and an intermittent vent restriction JB. My latest question (from someone that knows just enough to be dangerous) is... would the fuel restriction alarm go off if the system has an air leak? doesn't it only recognize if the pump is pulling a vacuum, therefore not recognizing an open system? I'm going to get a vacuum tester to check the system. That will help me find an air leak, but I don't believe that's the problem. Something else I've noticed is that the fuel/water separator is the Mercury type with the smaller diameter screw on fitting. All the hoses on my fuel system are 3/8 per OMC, but the OMC style separator have the larger diameter screw fitting? could that be an issue? I know its a lot of questions, but I'm just running through every possibility.