LED lighting, soundproof, Sailor's Solutions Inc.      

Vacuum Monitoring of Diesel Fuel Systems

      

Vacuum gauges and alarm switches, shown above, are used to monitor your diesel fuel system, including the filter element. As the element becomes clogged, fuel flow becomes more restricted resulting an increase in vacuum on the engine side of the fuel filter.

A vacuum gauge can be used for more than just checking the condition of your fuel filter. Many variables in your fuel system will affect the readings on your gauge. Here are some examples:

Some possible causes for
high readings:

Some possible causes for
low readings:
  • Dirty Primary fuel filter
  • High density filter media being used (2 micron filter cartridge. 30 micron is recommended)
  • The use of a fuel strainer on the pick up tube in the tank
  • Undersized fuel Lines
  • Fuel valves not fully open
  • Blocked fuel tank venting kinked hose or
    insects in the overboard screen (check your Fire Extinguisher Hose ends weekly)
  • Fuel hose inner liner collapsed
  • New secondary fuel filter
  • Lower fuel level in tanks
  • Fuel Gelling (very cold temp.)
  • Dirty secondary fuel filter
  • High level of fuel in tanks
  • Worn fuel pump
  • New Primary filter
Other Tips:
  • Readings should be taken at cruising RPM or higher while under load. The drag point feature really comes in handy because it remembers the maximum vacuum.
  • Some engines use the fuel flow in the system for cooling of the injectors and pump. Even though the engine is running well, you might have a improper fuel flow. Check with your engine dealer.
  • Most Diesel engines use a mechanical fuel pump (lift pump), which will cause the needle to vibrate. Dash mounted (hose run dampens) and gauges with a restricter will also dampen this effect. With the proper valves it can also be used to check for any leaks in the suction side of the system.
Find our vacuum products in our Engine Room.

Click here for Racor marine filter information.
product<br>image
Portable LED cockpit and anchor light with daylight sensor and cigarette lighter plug
Be safe - Light up your cockpit and keep an extra anchor light on board Doubles as a cockpit/ utiltiy light
$34.95
product<br>image
SCAD Solo Tank Tank Monitor with Gauge Panel and External Tank Sensor
Sensor installs easily on the outside of your tank. Awarded Practical Sailor Editor's Choice 2009
$154.95
product<br>image
Signal Mate 2NM LED Tri-Color & 2NM Anchor with Wind Indicator Illumination Includes mounting bracket
Compact and rugged Designed for many years of operation Made in USA
On Sale through February. MSRP $351.00, Now $285.00!
$285.00
product<br>image
Signal Mate 2NM LED Tri-Color plus Anchor, Wind Indicator Illumination and Daylight Sensor (bracket included)
Compact and rugged Designed for many years of operation. Daylight sensor turns Anchor light on/off Made in USA!
On Sale through February. MSRP $371.00, Now $310.00!
$310.00
product<br>image
Ultra Tef-Gel - Anti-Seize Lubricant for fastening stainless screws to aluminum
Non-lanolin 100% synthetic formula US Navy spec.
$15.49
product<br>image
Perfect Pole Telescopic Handle for Hooknife Rated #1 by Powerboat Reports!
This is the best pole/handle for our line slicing Hooknife. Extends your Hooknife's reach by 6'
$29.95
product<br>image
3M™ Scotchlite™ SOLAS Reflective Tape 2 inch wide- SOLD BY THE FOOT
See and be seen! Sold by the foot
$1.79
product<br>image
Coolnet Sailboat Hammock - Unique 3-point design sets up fast and stores easily
If you want a really nice place to lounge or sit you need this hammock! that you can rig in a few minutes
$169.99

Go to top of page.