Fuel Filter issue????

[peterb]

I recently bought a 1978 Seacraft FS. It has twin 1998 SW series HP engines, w/Raco fuel filters.<br /><br />I had the filters changed out and the boatyard (which is 2 hours away said everything ran fine).<br /><br />I just turned over the engines. One engine ran fine and the other did not. The one that sounds like its operating several cylinders short has a fuel bulb that i cannot get hard. Hence I think that I may have a fuel inflow problem. i called the boatyard and they say that I should check my lines, but that the fuel filter has to be fine.<br /><br />On my Yamaha fuel management system it alarms with the "bad engine". It looks like that it is indicating a water seperator alarm.<br /><br />Some quick questions.<br /><br />How do i check this? Do I remove the screw at the bottom of the filter in question?<br /><br />Would this restrict my fuel inflow?<br /><br />Has anyone ever experienced a problem like this?<br /><br />Any other ideas & input would be greatly appreciated.<br />Thanks,<br /><br />Peter

 

[Ray Neudecker]

Re: Fuel Filter issue????

Are these carb motors?

 

[peterb]

Re: Fuel Filter issue????

Yes they are.<br /><br />FYI, I took the lines off and saw ample fuel in the good motor, but not with the one that is giving me the trouble.

 

[bigbrownbuku]

Re: Fuel Filter issue????

go right over your fuel system.<br />first is the filter primed? some folks dont fill a filter before they fit it leaving the work up to the engine pumps, this may work if the carbs are full but usually doesnt.<br />are all your lines in good condition?<br />are all the fittings tight? any kinks or leaks that may lead you to a cause?<br />if all of the above checks out get the engine started on a day tank, is everything engineside behaving normally?<br />get the filter primed and fuel to the engine, reconnect it all and add a vacuum guage into the line at the tank side of the engine filter(the small one under the cowl). work backwards from there checking for vacuum problems(make sure one of your guage lines is clear)keep an eye out for bubbles in the fuel line also. at idle you should draw an inch or 2.