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
Winch Handle Holder

$24.95
product<br>image
Wireless 12 Volt DC Remote Switch
Use the same technology that unlocks your car door to turn your deck lights on before you board from up to 75 Yards away - Makes boarding easier and safer!
$39.00
product<br>image
Outdoor Collapsible Solar Lantern. Luci Outdoor 2.0

$19.95
product<br>image
60-100-SR-IG alternator, ARS-5-H regulator, MC-TS-A Alternator Temp Sensor, MC-TS-B Battery Temp Sensor
Everything you need to upgrade your Yanmar,Perkins or other saddle mount dual foot alternators to the most efficient charging system for AGM or flooded cell batteries

Charge faster Charge better!
$939.95
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
WinchRite ABT Cordless, Lightweight, Electric Winch Handle
Boat Show Special through February! Instantly electrify all your winches!
$749.00
product<br>image
Automatic Loading Multi-bit Screw Driver will make you the feel like Matt Dillon! Works like a pump gun!
Loads and chambers a bit from its magazine/ handle. You never touch the bit!
$19.95
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

Go to top of page.