GENERAL INFORMATION
The Mr. Gasket (Micro) Electric Fuel Pump #12D is a gravity
feed pump designed for use with diesel applications, either
as a stand alone, booster or fuel transfer pump. Pump is
self-priming, with a two bolt and two wire installation. Aver-
age 2 amp draw at maximum delivery. Operating fuel pres-
sure range for is 4 – 7 PSI and flow is 35 GPH.
MOUNTING PROCEDURE
Step 1
Make sure the fuel tank is very close to empty. Drain if
needed. Inspect the current fuel line – if it is cracking, re-
place it with a new fuel rated hose. Install supplied in-line
filter to prevent small particles from entering the pump.
We highly recommend installing a filter as well between
the carburetor and fuel pump to prevent small particles
from entering the carburetor. If you choose to no longer
use your mechanical fuel pump, make sure to install a
block-off plate or plug the pump inlet and outlets. All fuel
line connections should be leak-proof.
Step 2
Mount the pump about 12” from the fuel tank and as close
to the lowest level of the tank to ensure proper fuel sup-
ply. Refer to Figure 1. Make sure mounting area is clean
of all rust, paint and grease.
Step 3
Using the pump mounting bracket as a template, drill two
7/32” holes. Next, use the supplied self-tapping bolts and
star washers to secure the pump and ground lead to the
frame. Always mount the pump in a location that allows
you to add the safety nuts provided. Install the supplied
filter in the pump inlet and install outlet fitting using thread
sealer and tighten to 10-ft-lbs. NOTE: Never install pump
in engine compartment.
Step 4
Attach the hose to the inlet side of the supplied filter using
automotive quality hose clamps. Some tank outlets may
have 3/8” instead of the supplied 5/16” fittings. You may
need to purchase one 3/8” barb x 1/8” NPT x 3/8” length.
If using 3/8” fitting, you may need to purchase a 3/8” filter.
DO NOT USE PUMP WITHOUT A FILTER. Install the
correct size fuel line from the outlet port on the fuel pump
to the factory metal fuel line going to the engine bay. If
no fuel line exists, fabricate a hard line from the pump to
the engine compartment. NOTE: Never run rubber fuel
line from the rear of the vehicle to the front. Always
minimize use of rubber hose. When possible, use steel
hard line.
Step 5
Make sure to use the red lead for 12 Volt power (fused
5 amp max) and the black lead for ground. The red
positive lead needs to be connected to the switched
ignition terminal. Use a 5 amp fuse or in-line fuse holder.
Use only automotive grade electrical cable - minimum
16 gauge. If wire is run over 20 feet, use 14 gauge.
Ensure that all connections are secured and sealed
from the elements. NOTE: This pump is for negative
ground systems only.
INSTALLATION INSTRUCTIONS
(MICRO) ELECTRIC DIESEL FUEL PUMP – Mr. Gasket Part No. 12D
FORM 12D2012-REV2
READ ALL INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. FOR NEGATIVE GROUND SYSTEMS ONLY. NOT FOR USE
WITH FUEL INJECTED SYSTEMS, HIGH PERFORMANCE OR MODIFIED ENGINES, AIRCRAFT OR MARINE APPLICATIONS.
FIGURE 1:
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