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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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Old 09-16-2013
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High Pressure at Racore Filter

I have a 81' Universal Atomic 32hp. My Racor filter gauge is reading a high pressure of between -15 to -18lbs, well into the red. I was told that it should be running between -4 to -6lbs. I have a primer pump built into the system. When I turn the primer pump on the pressure drops down to -10 lbs. The primer pump is before the filter. When I bought the boat this was also the case. I was told I needed to change my fuel filter.
Since then I have replaced both the racor filter and the fuel filter on the engine. I have pulled the tank and had it cleaned, put in a new pickup tube and installed a new vent hose. The pressure remains high. In my mind the problem should be between the tank and the racor is that correct?

There is an Algae X fuel polisher in line but when I researched that it has no moving parts and claims to be mainteance free. Could this unit be the reason for the high pressure? Could the gauge on the racor be bad? I should add that the engine runs like a top and does not seem to be suffering what so ever from fuel starvation.

Thanks for your input. Scup
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Old 09-16-2013
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Re: High Pressure at Racore Filter

The Algae-X isn't going to create a high pressure reading. Mine doesn't visibly affect the pressure at all.

Did you set the Racor guage to zero by carefully removing and replacing the tiny pin at the top? Does it rest at zero with the engine off?

Sounds like you've done the reasonable things, so maybe there's no problem at all.

What size Racor filter do you use? 2 microns, 10 microns, or 30 microns?

Bill
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Old 09-17-2013
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Re: High Pressure at Racor Filter

I am using a 10 micron filter. I did not know that the racor filter guage could be reset. I will try and do that and see what I get. Thanks for your input.
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